• Hiking Among Giants

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    Walk in the Sequoia woods at any time of the year and you will say they are the most beautiful and majestic on earth.

    ~John Muir

    I am far behind in posting about recent events, sightings and travels. But I guess that is a good problem to have – doing and seeing so much that I don’t have time to write about it! So, here is the first of several  posts on our travels this past month. We finally made it to see the giant sequoias and the incredible high country of the Sierras. Melissa was awarded a trip for an interpretive training session in California, and I flew out to join her and Megan for a rather unplanned camping trip afterward. Our first planned trip had been postponed a few years ago when wildfires blanketed the area with smoke, so we made some last minute changes and hiked the Lost Coast Trail instead. Now we had the time, but little in the way of concrete plans (no reservations for campsites, since they fill up months in advance and this trip had been planned on much shorter notice). I flew into Reno, Nevada, and we drove several hours into the Central Valley of California, home to what looks like our country’s largest source of fruits, nuts, and vegetables, with mile after mile of irrigated farmland. After an overnight near Fresno, we were up early and headed into Kings Canyon National Park. We lucked out and got a back-country permit for a 10-mile hike in Redwood Canyon, home to some large groves of giant sequoias. Since we only planned to hike a couple of miles before pitching camp our first evening, we decided to first take in a few of the iconic sites accessible by road.

    deep canyon over 8000 ft deep
    Junction View looking into Kings Canyon (click photos to enlarge)

    Kings Canyon is considered one of, if not the, deepest canyons in North America. Just outside the park boundary, the canyon is almost 8200 feet deep from the Kings River to the top of an adjacent mountain peak. It is incredibly rugged and dry. The latter was the big surprise to me. No wonder forest fires are such a part of this landscape.

    Zumwalt meadow Kings Canyon NP
    Zumwalt meadow

    The wettest habitats are, of course, along the waterways. We stopped at one of the classic Sierra landscapes, Zumwalt meadow, and arrived just in time for a ranger-led walk. The ranger was a young seasonal who had an amiable style and almost immediately shared a new learning.

    Ranger next to incense cedar
    A huge incense cedar was one of the first stops on the guided walk

    What I at first assumed was a young, yet still substantial, giant sequoia, turned out to be an incense cedar, a common species in these habitats. There are several notable features that distinguish the two species, so it was a good lesson for our hikes to come.

    Lorquin's admiral wings open
    Lorquin’s admiral butterfly

    At the meadow proper, we saw several butterflies – a few monarchs flitting about some milkweed out in the meadow, add a striking Lorquin’s admiral along the trail. We continued around the loop after the ranger finished his talk, but not before he gave us a good tip on a feature to look for on our drive out of the canyon.

    chevron folds Kings Canyon
    The famous geologic fold in Kings Canyon

    A geologic highlight no less (those that know me know how unusual this is for me). The ranger (who had a degree in geology) told us about a distinctive fold on the highway which I now know is famous as the Kings Canyon Fold. He said it was the textbook example of how rocks can be deformed at high temperatures and pressures. Sure enough, it is not only on textbooks, but is also an exhibit at the American Museum of Natural History. The canyon does provide incredible views of a landscape shaped by glaciers, rivers, and huge geologic forces that have occurred over the millennia. But what I most wanted to see were the living things that have survived the millennia – the giant sequoias.

    General Grant Tree
    General Grant tree

    A must stop for anyone in Kings Canyon is the General Grant tree, the second largest tree  (by volume) on Earth. Coastal redwoods are the tallest living organisms, but giant sequoias are the most massive. Giant sequoias (Sequoiadendron giganteum) grow naturally only on the west slope of California’s Sierra Nevada range. Redwoods (Sequoia sempervirens) grow naturally only in a narrow strip along the Pacific Coast.

    A few facts about the General Grant tree

    • It is the widest sequoia known, being 40 ft across at its base ( with a circumference of 107 ft, it would take 20 people holding hands to completely encircle its massive trunk)
    • 268 ft tall
    • Estimated age – 1700 years (a full 1500 years younger than the oldest known sequoia)
    • First branch is 129 ft above the ground
    Ranger hat with sequoia cone
    Giant sequoia cones as symbols on National Park Service hat

    The cones of these massive giants are a little larger than a chicken egg, and the seeds are like oak flakes. The ranger pointed out that the giant sequoia cone is one of the symbols on every National Park Service ranger’s uniform – on the band of their iconic wide brim hats.

    Huge sequoia
    A forest of giants

    Late that afternoon, we finally made it to the trail head into Redwood Canyon (Giant sequoias are sometimes called Sierra redwoods). We started our climb and immediately passed through groves of huge trees that included giant sequoias, sugar pines (with the largest pine cones in the world), and Douglas firs.

    Sugar Pine cone
    Sugar pine cone
    Grasses on ex[posed slope in Redwood Canyon
    Grasses along a dry ridge in Redwood Canyon
    Dead shrub twig pattern
    Patterns of twigs

    Late in the day we reached a rocky ridge line overlooking a small canyon. A few open areas provided great views and some interesting patterns in the growth form of plants.

    campsite in Redwood Canyon
    Our first campsite in Redwood Canyon

    We finally settled on a spot near the edge of the ridge with a panorama on one side and a grove of giant sequoias on the other. The forest was incredibly quiet, a fitting silence in such a place of reverence.

    Giant sequoias at sunset silhouette
    Sunset among the giants
    View from campsite B&W
    The view at sunrise from our camp

    Megan initially planned to sleep in the hollow base of one of the giants, but ended up setting up her tent in the middle of the night when the scurrying sounds of small mammals, and the more worrisome sound of some larger species, interrupted her sleep (we found what we assumed were three bear day beds on the slope above our campsite).

    Sasquatch shadow
    Origin of Sasquatch?

    On a morning walk I discovered a surreal figure on one of the sequoia trunks – a burn scar that had an eerie resemblance to a human form, especially when viewed at a distance.

    Sugar Bowl trees 1
    We spent a lot of time looking up at the canopy in awe
    Tunnel tree from far end
    A tunnel tree
    Tunnel tree with hiker
    Walking through the downed giant with our backpacks and room to spare
    Giant sequoia with Megan for scale
    Megan standing at one of the giants in Redwood Canyon

    Our second day was a longer hike ( about 7 miles) through incredibly beautiful terrain that included dry ridges, clear mountain streams, and more giant sequoias. Along the way we spotted a variety of birds, some deer, and an array of wildflowers.

    Columbine flower 1
    Crimson columbine against a backdrop of a small waterfall along the trail
    Indian paintbrush
    Indian paintbrush was a common splash of red on our hike
    Whisker brush
    The beautiful flowers of whisker brush in a sunny spot
    Sequoia stump
    Our camp the second night was in the vicinity of an old logging camp dotted with massive stumps

    We camped the second night along a stream surrounded by the weathered stumps of sequoias cut long ago in the age of loggers in these mountains. I can’t imagine cutting down one of these giants – both the physical effort and time required (it often took a couple of days just to cut through the trunk), and the process of getting the wood out of this steep terrain. We hiked out the next morning and headed to the adjoining Sequoia National Park (our second oldest national park) with the goal of seeing the General Sherman tree.

    General Sherman tree outline
    Melissa stands in the “footprint” display of the General Sherman tree

    The largest tree (by volume) on Earth, the General Sherman tree is in a forest of behemoths, appropriately known as the Giant Forest. Described by John Muir when he entered this grove in 1873 – A magnificent growth of giants…one naturally walked softly and awe-stricken among them. I wandered on, meeting nobler trees where all are noble…this part of the Sequoia belt seemed to me to be the finest, and I then named it “the Giant Forest”.

    General Sherman tree
    The General Sherman tree from a distance

    We all are thankful for the efforts of Muir and the many others who saw the majesty in these trees and fought for their preservation. There is something magical and humbling about walking among them, and it is a feeling you cannot find anywhere else. As Muir noted after walking the ridges of this area …it seemed impossible that any other forest picture in the world could rival it. I will have to agree with him, there is no place like the sequoia woods.

     

     

  • Sweeping Grass and Rolling Logs

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    The art of teaching is the art of assisting discovery.

    ~Mark Van Doren

    We had an adventure on one of the last weeks of summer camp at the Garden. It was all about discoveries – trees, dragonflies, aquatic macroinvertebrates, field and forest insects and animal tracks and signs. A highlight for me was sharing the incredible diversity of Mason Farm Biological Reserve with those budding naturalists. We sampled both field habitats and forest edges using various techniques from sweep nets (swinging a mesh net back and forth through tall grasses and examining your catch) to log rolling (gently turning over downed logs to check for decomposers and other critters).

    Phidippus clarus, Brilliant Jumper, good eye view
    Brilliant jumper, Phidippus clarus, in a sweep net (click photos to enlarge)

    The kids were excited about their finds as they swept the nets back and forth along the edge of the meadows. I was so busy helping them catch and identify things I didn’t have much time to photograph anything, but when one camper saw a tiny jumping spider in his net, I had to grab the camera. I have a weakness for jumping spiders and their bold colors, huge eyes, and “inquisitive personalities”.

    Phidippus clarus, Brilliant Jumper, looking up
    Brilliant jumper right before it did just that (up onto my lens)

    I later identified it as a brilliant jumper based on the green chelicerae and the orange pattern on the abdomen. I shot several images as it crawled about the edge of the net, pausing frequently to stare up at my camera gear looming overhead. It finally did what they often do, and leapt up onto my lens, ending its photo session.

    Rabid wolf spider, Rapidosa rapida?
    Rabid wolf spider, Rabidosa rabida

    As we walked along the forest edge, someone spotted a huge wolf spider. I bent over for a closer look and a quick picture of its enormous (and numerous) eyes. I’m not sure how the common and scientific names came about (rabidus is Latin for wild, crazy, raging), but maybe some early arachnologist laid down and looked into the face of one of these huge spiders and felt a slight twinge just as I did.

    We showed the campers the proper technique for rolling a log (gently roll it toward you so that any larger critters can escape away from you instead of coming at you).

    Psallis beetle in gallery in log
    Passalus beetle, Odontotaenius disjunctus, in one of their tunnels in a log

    One log revealed a treasure trove of beetles – some adult passalus beetles (in the family Passalidae), and several large beetle grubs. These common large beetles are also called patent leather beetles, horned beetles, horned passalus beetles, bess beetles, and many other common names,

    unid beetle grub;  not a psallis 1
    Large beetle grub under log

    The first two grubs were huge, curled in a C shape under the log. I did a quick glance and told the excited kids those were probably the larvae of the passalus beetles and bent down to pick one up. I then noticed another larva crawling nearby. It was slightly slimmer and was actively moving instead of being curled up.

    Psallis beetle grub on finger for scale
    Another, more slender, beetle grub

    At first, I assumed they were just different ages of passalus beetle grubs. I remembered reading that their larvae have a reduced pair of legs used for stridulation (making sound by rubbing one body part against another, in this case, the reduced leg against the adjacent larger leg).

    Unid beetle grub; probbly not a psallis
    A closer look at the first grub shows 3 pairs of legs with the first pair slightly reduced

    I always had wanted a photo of the reduced pair of legs (it’s what we nature photographer types do) so I flipped over one of the larger grubs and took a couple of quick shots. Sure enough, the first pair of legs was smaller then the other two pair. We gently replaced that log to its original position and rolled another. More beetles! And something else…

    Psallis beetle pupa
    Beetle pupa

    There were a couple of beetle pupae under the log (I assumed they were passalus beetles). This was really cool as I had never seen large beetle pupae before. One was attached to the underside of the log in what looked like a chamber made of wood debris and maybe beetle frass.

    Immature psallis beetle
    Juvenile passalus beetle is brown in color

    There was also a brown-colored passalus beetle. These are juveniles and they will gradually darken to black as they mature (I wasn’t able to find how long this takes).

    Adult psallis beetle
    Adult passalus beetle is black

    Passalus beetles are fascinating critters and a frequent live animal used for environmental education demonstrations. They are one of the few beetles that are social and tend their young. They feed by chewing galleries through the soft wood of downed trees and then re-ingesting their frass after it has been colonized by bacteria and fungi. They also feed this mixture to their larvae. One way they maintain this social structure is through a complex communication system created by stridulation. Adults stridulate by rubbing rows of spines on the undersides of the soft, flying wings (the membranous wings hidden under their hard outer wing structures – the elytra) against a hardened textured area on the top of their abdomen. As I mentioned earlier, the larvae can also make sounds, and these are believed to be important not only for social communication, but also defense against predators. Pick a beetle up and hold it close to your ear, and you are likely to hear some squeaks (click this link to hear passalus beetle stridulation). This same reference states that passalus beetles have 17 known audio signals for both adults and larvae, making it the most elaborate sound communication system known for any arthropod.

    I was all set to write up a blog post when I double-checked my information on the life cycle using various online resources. Then it happened…I began to think I had made a mistake in my identification of the large grubs. I found a reference that stated passalus grubs have a reduced pair of legs, but it is the third pair, not the first, as I had seen on the large grubs. Plus, it said these small legs were so reduced as to be difficult to see. Dang, I had to go back and check out those grubs again. Well, as luck would have it, it rained a lot the next day and the creek rose making it tough to drive across to Mason Farm. Things were busy at work that week, but as I was walking on our nature trail one afternoon preparing for a program, I saw a log off the side of the path. I walked over and flipped it, hoping to find…

    Psallis beetle grub and adult
    Passalus beetle adult and larva

    There was an adult passalus beetle and a large slender grub! There were actually a couple of grubs under that log, so I gently grabbed one and flipped it over to look at its legs.

    Psallis beetle grub showing reduced leg
    The third pair of legs is greatly reduced on this grub

    Yes, indeed, that third pair of legs is reduced and very difficult to even see on a passalus beetle larva! So, I had been wrong in my ID on that first quick glance. Those large grubs are most likely the larvae of some other beetle, perhaps a stag beetle. Not only did they not have the greatly reduced third pair of legs, but they were all curled into a C shape. Passalus grubs are usually straighter in posture and more slender. I’m not sure about the pupae, as I didn’t manipulate them to see all sides, but I think they still may have been passalus pupae. It was a good reminder that I need to make careful observations and to double-check my information. Of course, now I want to go back and check on the pupae and see if they are still there, and, if so, maybe keep one to see what emerges. It also showed me that there is always something more to learn about even the common creatures we share our world with, and that learning truly is a life-long endeavor.

  • Garden Ramblings

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    A garden must combine the poetic and the mysterious with a feeling of serenity and joy.

    ~Luis Barragan

    If I am going to be working, it may as well be in a beautiful place like the North Carolina Botanical Garden! Just walking to and from my car offers glimpses of beauty and wonder every day. But, my favorite time is after the gates close and everyone has gone home…a stroll through the quiet garden habitats can be magical. Here is some of that magic from the last few weeks.

    Bumblebee on Great Blue Lobelia
    Bumblebee gathering pollen and nectar from a great blue lobelia (click photos to enlarge)
    Green frog juvenile
    Green frog resting on a floating leaf as it transforms from a tadpole to a frog
    Pitcher plants
    The symmetry of some Okefenokee hooded pitcher plants
    Young snapping turtle
    A young snapping turtle in our Coastal Plain habitat
    Yellow Fringed Orghid
    The delicate flowers of yellow-fringed orchid
    Meadow beauty seed "pod"
    The urn-shaped seed vessel of meadow beauty
    Aphids
    Aphids gathering for a picnic
    Jack in the Pulpit seeds
    Jack-in-the-pulpit seeds ripening to their striking red color
    Baby box turtle
    A young (maybe 2 years old) Eastern box turtle on the path
    Silver-spotted skipper on pickerel weed
    Silver-spotted skipper on pickerelweed
    American lotus seed head close up
    Close up of the seed head of an American lotus
    American lotus seeds close up
    After the seeds of an American lotus mature
    Green Lynxx Spider
    A green lynx spider awaiting a meal
  • Backyard Rambles

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    The world is full of magic things, patiently waiting for our senses to grow sharper.

    ~William Butler Yeats

    There are times in this blog when I don’t seek to tell a detailed story of the life of some natural creature, but simply to share the awe-inspiring scenes that surrounds us, in this case our backyard here in the woods. It doesn’t take long to find exquisite beauty if you look, listen, and move at a slow pace. This is our refuge, our special place. I hope you can find one near you.

    Here are a few of the small wonders found one evening this week on a slow ramble around the yard…

    Imperial moth
    A tattered female Imperial Moth (click photos to enlarge)
    Red-humped caterpillars 1
    Red-humped caterpillars feeding on Redbud
    Acanaloniid Planthopper
    Acanaloniid Planthopper
    Red-spotted purple egg
    The sculptured egg of a Red-spotted Purple Butterfly on Wild Cherry
    unid katydid nymph
    Katydid nymph
    Citrus Flatid Planthopper
    Citrus Flatid Planthopper
    Double-lined prominent ?
    Double-lined Prominent caterpillar
    Carolina anole young
    Young Carolina Anole
    Blue dasher dragonfly close up
    Blue Dasher dragonfly
    Blue dasher head shot
    A closer look at the marvelous eyes of a dragonfly
  • Catching Up

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    You are surrounded by gifts every living moment of every day. Let yourself feel appreciation for their presence in your life and take the time to acknowledge their splendor.

    ~Lou G. Nungesser

    It has been a whirlwind summer thus far with work keeping me a little busier than I care to be at times. I have had several opportunities to carry a camera but not as much time as I like to post things or learn more about the many plants and critters I have encountered. So, here is a rambling collection of things I have seen in recent weeks. It is truly amazing how much beauty and wonder surrounds us.

    Nessus sphinx moth egg on VA Creeper
    Nessus sphinx moth (Amphion floridensis) egg (click photos to enlarge)

    One morning during summer camp, I spotted a beautiful Nessus sphinx moth hovering near some Virginia creeper leaves, one of their host plants. The gathered summer campers were able to witness her laying three eggs. I collected one to raise since one egg had only one leaf for the future larva to consume.

    Nessus sphinx larva about 2 days after hatching
    Nessus sphinx larva two days after hatching
    Nessus sphinx larva
    Six days later it looks like this…still a long way to go
    Walnut sphinx moth just after emergence
    Walnut sphinx moth (Amorpha juglandis)

    The pupa I shared in an earlier post produced this beautiful walnut sphinx moth about two weeks after the pupa formed.

    Swamp milkweed
    Swamp milkweed (Asclepias incarnata)
    Hibiscus flower buds
    Rose mallow (Hibiscus moscheutos) flower buds
    American lotus flower
    American lotus flower (Nelumbo lutea)
    Cardinal flower
    Cardinal flower (Lobelia cardinalis)
    Cranefly orchid
    Cranefly orchid (Tipularia discolor) – the delicate flower stalk appears in late summer, long after the single leaf disappears

    I need to spend more time appreciating the incredible flowers that surround me every day…after all, I do work at a botanical garden!

    Southern flannel moth
    Southern flannel moth (Megalopyge opercularis), the adult of a bizarre, so-called stinging caterpillar, the puss caterpillar (or asp)
    Rosy maple moth
    A strikingly beautiful rosy maple moth (Dryocampa rubicunda)
    Clymene moth
    Clymene moth (Haploa clymene)

    We set out moth lights on a couple of nights the past few weeks and were rewarded with a variety of nocturnal visitors. Shown above are a few of my favorites.

    small hellgrammite
    Small Eastern dobsonfly (Corydalus cornutus) larva (also called a hellgrammite) found under a rock in the swift waters of Morgan Creek
    Pickerel frog
    Pickerel frog (Lithobates palustris)
    Powdered dancer damselfly, male
    Powdered dancer damselfly (Argia moesta), male
    Margined Madtom 1
    Margined madtom, Noturus insignis, a small (~5 inches) catfish found in swift waters like Morgan Creek

    One of our favorite summer camp activities is a hike out to Morgan Creek, where we sample a riffle area in this surprisingly pristine Piedmont stream. We always manage to see a variety of interesting creatures including hellgrammites, caddisfly larvae, mayflies, crayfish, and a few species of fish.

    Robber fly and moth victim
    Robber fly with moth victim
    Walnut caterpillar
    Walnut caterpillars (Datana integerrima) feeding on hickory leaves
    Resident bullfrog
    Huge male American bullfrog (Lithobates catesbeianus)
    Argiope spiders
    A pair of female black and yellow argiope spiders (Argiope aurantia) – they are also commonly called writing spiders and garden spiders

    Any stroll through the Garden produces a rich variety of sights and sounds. The key is, you have to be out there to enjoy them. So, get outside and see what you can find.

     

  • Plight of the Polistes

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    Let us turn elsewhere, to the wasps and bees, who unquestionably come first in the laying up of a heritage for their offspring.

    ~Jean-Henri Fabre, entomologist, 1823-1915

    We had a wasp sting two weeks ago at summer camp. The wasps had a nest inside the locking mechanism for one of our pedestrian gates, and when the gate clanged shut, an angry wasp flew out and stung the closest person. Then, last week, a wasp stung a co-worker as she tidied up the small fairy house we have in the children’ garden. Since that area is used by many visitors, especially children, I went out to check on it, and found a wasp nest inside, which I removed. We later stuffed something in the crack where the wasp probably entered, so hopefully that will take care of the situation.

    paper wasp nest
    Paper wasp nest under the eaves of my office building (click photos to enlarge)

    We have plenty of these paper wasps (Polistes sp., maybe P. metricus?) under the eaves of our buildings (and I have in them at home) and we all manage to get along just fine most of the time. It is usually just when the nest is down low that problems may arise. So it was, with the nest I removed. I don’t like doing that, but, after the deed was done, I decided to look more closely at that nest and the ones under the eaves. First on the list of amazing things about these creatures is that the nest is paper! Wasps scrape wood from surfaces, mix it with their saliva, and slowly create the hexagonal shapes that become cells for their eggs and developing young. The nest is suspended from a pedicel under a protected area like the eaves of a building, inside a bird house, or some other sheltered location.

    Paper wasp nest close up
    Closer view of the nest showing different life stages being tended by worker females

    The first nests of spring are started by a mated female queen wasp that overwintered in some protected spot. She constructs that first nest by herself or with some subordinate females (usually sisters) that may have overwintered as well. Her first fertilized eggs are all female and are destined to become workers. Once they emerge, they take over the duties of caring and feeding new larvae. Workers forage for caterpillars and other soft-bodied insects that they chew up and feed to the larvae. Adult paper wasps feed on rotting fruit and nectar, so wasps are important pollinators and biological controls of plant-eating insects.. The photo above shows a worker female tending some of the brood cells. Eggs, in various stages of development, can be seen in some cells. The fat, white larvae with grayish heads, can be seen in others. Cells with paper coverings contain pupae.

    paper wasp egg
    Close up of a paper wasp egg

    I gently tore open the nest I had removed and examined its contents. Eggs are small, somewhat oval in shape, and attached on the side walls of the cells.

    paper wasp pupa
    An early stage wasp pupa

    As I was teasing apart one of the cells, a pupa fell out (above). I am guessing this is still a female this time of year. Toward the end of summer, the queen (also called the foundress) lays a series of unfertilized eggs, which become males. Some of her fertilized eggs will receive additional care and nutrients and may become future queens that will mate and overwinter. At the start of cooler weather, the males, female workers, and original queen all die, leaving the new batch of potential queens to overwinter.

    Paper wasp larva and pupa
    Paper wasp larva and late stage pupa

    I placed the pupae from this nest in a container and will watch to see if they emerge. What started out as an effort to rid a space of a stinging threat has turned into a greater appreciation of a common species that I have tended to overlook all these years.

  • Summer Details

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    The beauty of the natural world lies in the details.

    ~ Natalie Angier

    It has been a hectic few weeks at work with summer camp. One good thing is I am out in the Garden daily, and, anytime you are out in a place with that much diversity, there are plenty of things to see. I managed to take the camera out a few days before and after camp, and found some interesting subjects. Here are a few of the recent highlights…

    Waved sphinx larva
    Waved sphinx moth larva feeding on fringetree (click photos to enlarge)

    Walnut sphinx pupa
    The mummy-like pupa of a walnut sphinx moth (the antennae of the future moth can be seen outlined in the pupa as they curl down from the top into a point just above my finger)

    Snowy Tree Cricket
    Snowy tree cricket  (Oecanthus fultoni), male – this is the so-called thermometer cricket. The frequency of the chirps made by this species (made by the males as they rub their wings together) is considered a fairly reliable estimate of the air temperature. In the Eastern U.S., Fahrenheit temperature can be estimated by counting the chirps in 13 sec. and adding 40.

    Yellow jackets on caterpillar
    Yellow jackets dispatch a pink-striped oakworm to feed to their larvae

    Rabbit running in Garden
    One of the many bunnies that reside at the Garden (quite happily, I presume)

    Black-spotted prominent
    Gardener’s friend – a black-spotted prominent larva feeding on lespedeza

    Black-spotted prominent rear end
    This caterpillar practices deceit with its back end looking like a front end

    Sassafras berries
    The beautiful and wildlife-friendly berries of a sassafras tree

    Handsome Trig 1
    A handsome trig (also called a red-headed bush cricket). This one is a male. The handsome part is self-evident; the trig part refers to the family Trigonidiinae, or Winged Bush Crickets.

    Handsome Trig nymph
    Handsome trig nymph (wings are still developing)

    Dogbane Leaf Beetle
    Dogbane leaf beetle, an iridescent beauty

    Planthopper - Rhyncomitra microrhina
    A very pointy-headed planthopper (Rhyncomitra microrhina) that we caught while sweep-netting

    Planthopper - Rhyncomitra microrhina, top view
    Dorsal view of same planthopper

    Rear end of tulip tree silk moth cayerpillar
    All is well that ends well…the rear end of a tuliptree silk moth caterpillar. Eggs were laid by a female on 5/18/17, hatched on 5/30; caterpillars had all pupated by 6/29; first adult moth of this summer’s second generation emerged on 7/20. This new generation will overwinter as pupae.

     

  • Ambushed

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    We are not afraid of predators, we are transfixed by them, prone to weave stories and fables and chatter endlessly about them, because fascination creates preparedness, and preparedness, survival. In a deeply tribal way, we love our monsters…

    ~Ecologist, E.O. Wilson

    I took a stroll through the Garden after work one day this week, looking for some flowers to photograph as a backdrop for a needed poster. I wanted a flower off to one side, with black background for the lettering.

    Ironweed, which sp?
    Ironweed (click photos to enlarge)

    I stopped at an ironweed plant, a great nectar source for all sort sorts insects, and took a few quick shots. I saw some movement on another plant, and went over to grab a pic of a pollinator…

    Silver-spotted skipper on ironweed
    Silver-spotted skipper on ironweed

    The skipper was moving from flower to flower, probing for nectar. I moved to get another angle, and noticed something odd dangling below another flower…

    Silver-spotted skipper hanging from Ironweed
    Silver-spotted skipper dangling below a flower – look closely at the flower

    It was another silver-spotted skipper, apparently hanging by its proboscis. How did that happen? As I bent down to look, I noticed something on the underside of the ironweed flower – a small insect – a jagged ambush bug, genus Phymata. This is one of the sit-and-wait predators often seen lurking on flowers, waiting for an unsuspecting pollinator to get too close. Most predators of this sort are camouflaged to help conceal them while they wait. This one appears to look more like the developing seeds in the flower to the right in this picture, than the bright purple of the flower itself, so I am guessing it waited on the underside and grabbed the much larger skipper when it landed. I gently touched this tiny tiger to get it to move up for a better look.

    Jagged ambush bug close up
    Jagged ambush bug close up

    Ambush bugs are stout-bodied predators with enlarged, raptorial front legs, somewhat resembling those of a praying mantis. They look like some sort of alien tank out of a science fiction movie to me.

    Jagged ambush bug beak
    Powerful beak of an ambush bug can be seen here tucked under its head

    When a prey gets close enough, they lash out and grab it with those legs and stab it with their powerful beak, injecting toxic saliva with digestive enzymes. As the insides of their prey dissolve, the ambush bug sucks up the nutrients, leaving an empty shell of its victim behind. I am guessing this skipper had just settled in for a nice sip of nectar when terror struck, leaving its proboscis stuck down in a flower tube which led to the scene I discovered.

    Ambush Bug
    Jagged ambush bug

    The bug soon walked out onto the stem for an better view, so I snapped a few more images, When I looked at them on my laptop this morning, I noticed something else…

    Hitchhiker on ambush bug
    Another insect hitching a ride on the ambush bug

    During the entire sequence of shots of the ambush bug, it had another insect (or perhaps an insect larva) crawling around its body. Was it a harmless hitchhiker, or some parasite? A quick web search showed another image of an ambush bug with what looks like a small lacewing larva hitching a ride, and my somewhat fuzzy image looks similar. Coincidence or collaboration? I guess I will try to find this little guy again next week and see if I can get a better image of the hitchhiker for identification and clarification of this mystery.

     

     

  • Baby Spiders

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    Once you begin watching spiders, you haven’t time for much else.

    ~E.B. White

    I have been raising some tulip-tree silk moth larvae at home and at work which has necessitated the periodic collecting of small branches of tulip poplar. Last week, when I cut one and brought it in I noticed one of my favorite spiders sitting on the underside of one of the leaves.

    Magnolia Green Jumper female
    Magnolia green jumper looking up at the camera (click photos to enlarge)

    It was a female magnolia green jumper. I recently did a post about the males of this species when I found a couple on some pawpaw trees at the house. But this was a female (distinguished by the lack of swellings near the tips of her pedipalps) and she was apparently guarding something very precious…

    Magnolia green jumper eggs
    Eggs of a magnolia green jumper

    …a cluster of eggs in a loosely spun silken case on the underside of a tulip poplar leaf. They did not resemble the usual spider egg case, which tends to be enclosed in a globular silken egg sac. These were loosely dispersed beneath a sheet of silk as individual eggs. I checked online just to make sure and found some other images that confirmed these were indeed her eggs. Since I had already cut the branch, I decided to keep them and watch what happened.

    Magnolia green jumper seggs hatching close up
    Spiderlings just after hatching

    Three days after I collected the leaf with the eggs, I noticed a change. There appeared to be spider-like blobs poking off the green eggs. I must admit, I just could not figure out how this worked. Was this thing with leg-like appendages the spider emerging from the egg? The more I looked at it, I decided that the old egg shell is actually the whitish crumpled blob you can see next to each green orb in the photo, and that the roundish green thing is the abdomen of the a new spider.

    Magnolia green jumper spiderlings group
    Cluster of magnolia green jumper spiderlings

    This was confirmed over the next couple of days as I watched the spiderlings unfold their legs (this occurred on day 5 after I collected the eggs and two days after the previous photo was taken).

    Magnolia green jumper spiderlings close up
    Three days after I first saw the baby spider legs appearing to unfold from the eggs

    Magnolia green jumper spiderlings
    Magnolia green jumpers three days after hatching

    The young spiderlings have continued to develop as I watch them each day, their eyes appearing larger and darker in color, and they seem to be moving more, albeit still inside the silken covering laid down by their mother. Today, I will probably go ahead and clip their leaf to a tulip poplar branch and watch to see when (and how) they manage to leave this protective lair. I imagine, somewhere nearby, their mother is looking on with proud eyes (all 8 of them)…

    Magnolia green jumper female close up
    Magnolia green jumper female

     

  • Spittlebugs

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    In the spring, the eastern half of North America turns into one big spittoon…

    ~Amy Breau

    They have always fascinated me, these little blobs of “spit” on vegetation. Must be the leftover 4th grade boy that still resides in one corner of my brain.

    spittlebug spit
    Spittle (click photos to enlarge)

    Once or twice a year, I can’t resist the urge to touch one of the the little balls of spit, gently brushing away the foam to see what lies beneath. It is usually the same little green blob of an insect that greets me.

    Spittlebug nymphs
    A pair of spittlebugs revealed

    Usually there is only one, but this year, after reading there are often multiples hidden beneath the bubbles, I actually found two spittlebug nymphs in one of the frothy masses.

    spittlebug
    Close-up of spittlebug

    The aptly-named spittlebugs are related to other plant-suckers like aphids and cicadas.. The immature stage, or nymph, is the one that creates the spittle (it has also been called frog spit or snake spit) as both a protection from predators, and as the ideal humidity and temperature control chamber that helps them keep from drying out in warm temperatures. The nymph sucks on plant juices while facing head-down on a stem, and uses anal appendages to froth up the excess liquid exuded as a by-product of its feeding habits. The bubbles flow downward with gravity and eventually envelope the nymph. Interestingly, the bubbly mass has good staying power (the bubbles may last several days), which makes me wonder if there might not be some commercial use for whatever it is they use to give their bubbly cover such longevity. Another oddity about this critter is that, unlike most sap-sucking insects, this one tends to tap the xylem, the tissue that transports water from the roots to the shoots. Most other sap feeders use the phloem, the tissue that transports food from the leaves down to the roots as it is generally more nutrient-rich. This may explain why they must process large quantities of fluid (they pump 200+ times their body weight in fluid every day) to sustain themselves.

    Two-lined Froghopper
    Adult form of one species – the two-lined froghopper

    Adult spittlebugs also feed on sap, and some are considered agricultural pests. Many are known by the common name, froghopper, due to their incredible jumping ability. A few resources state they may be the all-time champion jumpers, worthy of superhero power status, as some froghoppers can leap up over 100 times their body length, the equivalent of a six-foot tall human jumping the height of two football fields!

    I am beginning to see some small frothy masses appear again on vegetation at the Garden and references state that, for many species, there are two generations per year. So, you still have time to get out and rub some spittle to see what’s underneath. Just make sure there are no 4th grade boys around.

     

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