Nature in the ‘Hood

There is something that can be found in one place. It is a great treasure which may be called the fulfillment of existence. The place where this treasure can be found is the place where one stands.

~Martin Buber

Indeed, there are beauties all around us, so it really doesn’t matter where you stand, or live. I have not posted as much lately as I would have liked, and one of the reasons is that I have changed that place where I will stand and live. It is not far from my beloved Roads End (yes, I really did live at the end of Roads End, hence the name of this blog) and it, too, is a place of beauty, but without quite as much habitat diversity as the power line corridor at Roads End provided. The woods are older here, comprised mainly of towering Tulip Poplars, White Oaks, and various hickories. One added natural feature is that there is a little water here – some woodland pools and an intermittent wet-weather stream. With that, and the appropriate upland habitat, comes a special group of animals.

Salamander egg mass

Spotted Salamander egg mass (click photo to enlarge)

I had seen a few Spotted Salamander egg masses in the pool right before all the cold weather hit and was anxious to see how they would fare after their home was frozen for the past 2+ weeks. Since the female salamander had attached most of the egg masses to twigs well below the water surface, almost all of the eggs seem to have survived quite well. I lifted one of the twigs to show the egg mass for the photo above. This is a great sign of things to come here in these woods.

And, as if to help in the transition, there have been a few other special wildlife moments – a Red Fox trotted through the woods behind the house during the snow; a Barred Owl was hunting one morning in some trees near the porch; and this morning when I drove in, an adult Red-shouldered Hawk flew from a perch above the salamander pool. The hawk was surveying this mini-wetland for a possible amphibian meal, no doubt. All good signs indeed of the treasures to come. Now to capture some with my camera. Stay tuned…

Salamander Jelly

I shared an early sign of spring about a month ago when I posted some images of Spotted Salamander spermatophores (Salamander Candy) in a woodland pool near my home. Last week I checked out that pool, and a few others, looking for the next step in the recipe for creating a full-baked Spotted Salamander – the egg masses.

early egg mass

Recently deposited egg mass of a Spotted Salamander (click photos to enlarge)

These jelly-like blobs usually contain 50 to 200+ individual eggs. When first deposited, they are about the size of a golf ball. Over the next few days, the gelatinous mass absorbs water and grows much larger, often almost attaining the size of a somewhat elongate softball.

Spotted Salamander eggs no flash

Early development of embryos from shady woodland pool

Most of the egg masses I saw in the shady woodland pool were still in the “nub” stage – the developing embryos are not yet recognizable as salamander larvae.

Spotted Salamander eggs with flash overhead

Macro shot of egg mass using twin flash

The amount of detail you see depends greatly on the light used to illuminate the egg mass. It will probably take another week or two of warm weather before these hatch.

road side ditch

Roadside ditch containing salamander larvae and eggs

That same day, I traveled to an open roadside site near Jordan Lake where I found salamander eggs in the past during my amphibian workshops for the museum. The site has been altered since I last visited and is smaller now due to some bulldozing nearby.

Spotted Salamander egg mass in net

Egg mass from roadside ditch

To my delight, there are still salamanders hanging on at this site.

egg mass before hatching

These are much further along in their development. They may have been deposited at an earlier date than those from the other location, but since this site receives full sun most of the day, these eggs probably develop faster than those from the shady woodland pool.

egg mass before hatching flash

Egg mass using flash

Again, the angle and type of lighting gives a much different look to the art of the egg mass.

Here are a few close ups of the developing larvae…

_-4

The embryo lengthens after the “bud” stage

early embryos in whale stage

At this stage they remind me of tiny whales or manatees encased in glass bubbles

_-3

You can see a larval form now including the “balancer” under the chin – one of two fleshy appendages the larva has for a few days after hatching that help it maintain position in the water column

_

The last stage before hatching. Note the two layers to the egg (all of which is also embedded in a gelatinous matrix with the other eggs). You can also see the symbiotic green algae in the egg layer.

The gelatinous matrix begins to deteriorate right before the larvae start hatching so you get these individual, greenish salamander globes in the water. I think this may be my favorite part of the recipe.

Salamander Candy

Spring is here. Maybe not in its totality of warm days and flowering plants, but there are signs – signs of new life. This week I heard the first dawn chorus in my woods – the songs birds sing, especially in spring, at the first light of day. The lilting notes of the Bluebirds are particularly noticeable after having been so quiet for many months. And the first frogs have been heard calling from what should be woodland pools full of water after our wet winter. Sunday was one of the first spring-like days we have had in these parts in quite some time, so it demanded a walk in the woods. My walk ended up along the creek that flows across the power line a half mile or so from the house. In its lifetime, the creek has created several oxbows and pools in the floodplain and these are home to some of my favorite living things, the creatures of vernal pools. These often ephemeral pools are home to a host of amphibians and invertebrates that are found only in waters that contain no fish. One of the most interesting to me is the Spotted Salamander, Ambystoma maculatum.

spotted salamander

Spotted salamander in woodland pool (click photos to enlarge)

These large woodland salamanders make their way to vernal pools on warm, rainy nights in late winter and early spring, to breed and lay eggs. They are most easily seen by flashlight at night or by gently turning over logs near the edges of the pools. During the breeding frenzy, male salamanders deposit specialized structures, called spermatophores, on the bottom of the pool. At first glance, the spermatophores may look like bird droppings littered about on the leaves in the pool.

Spermatophores in pool

Spermatophores in pool

But a closer look reveals something quite different. I remember thinking they resembled a gelatinous Hershey’s Kiss the first time I picked one up. These salamander candies are about 6-8 mm tall, with a clear, gelatinous base, and a multi-pronged whitish stalk on top of which is a cap containing the sperm.

spermatophore 1

Spotted Salamander spermatophore close up

I have watched pools and noticed that usually about two to three days after I first see the spermatophores on the bottom, I find the first egg masses. After the courtship bout, the female salamander picks up the spermatophore in her cloaca and about two nights later starts laying egg masses.

Spotted laying eggs

Spotted Salamander laying eggs

The heavy rain had been on Friday night, but the pool I saw on Sunday contained no eggs and it was getting very shallow, so it started me wondering about the spermatophores. I had always assumed the female picked up the entire gelatinous packet. But I decided to check it out before posting something about this whole process. I quickly turned to an excellent salamander resource on my bookshelf, Salamanders of the United States and Canada, by James. W. Petranka. I had a chance meeting with Dr. Petranka at sunrise this past winter on the viewing platform at Pungo Lake. After observing and discussing the birds for a few minutes, he introduced himself, and I excitedly blurted out, “Oh, you’re the salamander guy”! His book is an amazing compilation of detailed information on the life histories of salamanders and I have referenced it countless times, so it was an honor to meet him in person, and he was gracious to not laugh at my enthusiasm. Petranka referenced the females “picking up sperm caps”. That implies that maybe they do not take in the entire spermatophore. So, I emailed another excellent resource on all things natural history, Jeff Beane, Collection Manager for Herpetology at the NC Museum of Natural Sciences. He responded saying the female squats over the spermatophore and takes up seminal fluid from the top with her cloacal lips, leaving behind most of the gelatinous structure. She may do this with several different spermatophores. And the gelatinous base may remain visible in the water for a few days afterward before decaying. Mystery solved. Yesterday, three days after the presumed breeding bout during the rains of Friday, a few spermatophores were still visible in the pool. These may either not have been utilized by a female salamander, or, they may just be the bases slowly decaying. Later this week, I will check that and other nearby pools to see if there are any egg masses. I always look forward to seeing the “globs of jelly” that result from the nights of salamander candy.