Autumn in the Pineywoods

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East Texas Waterfall

As I write this, on a cold and rainy day at the end of December, all but a handful of brave trees have cast their leaves in preparation for the darkness and cold that winter brings.  Days like this it’s easy to long for the milder days and brilliant colors of fall.  This year was a particularly beautiful autumn in the Pineywoods, with many species putting on displays of color that I had not seen for some time.  To fight off the gloom of this winter’s day, I decided to live vicariously through my memories as I chronicle my autumn explorations here.

We’ll start on my birthday.  At the start of October, the days have become shorter and the temperatures begin to cool.  October has always been one of my favorite months here in Texas.  The colors begin to turn, and the climate is mild.  Cool enough that it is pleasant to be outside, yet warm enough that many winter-adverse species such as reptiles and insects are still active.  A number of interesting fall-blooming plants are also on display in this month of the Hunter’s Moon.

On my birthday we set out to find a few such plants.  The first that we came across was the Indian Pipe (Monotropa uniflora), also known as the Ghost or Corpse Plant.  This interesting fungus-eating plant is a member of the blueberry family, of all things.  It does not produce chlorophyll like most traditional plants, but rather obtains its energy and nutrients from the mycorhizzal fungi of tree roots.  In Texas they may begin to bloom in late August or early September, and I have seen them as late at January (late in the sense that it is at the end of the blooming season for this species).  The flowers’ superficial resemblance to a pipe as inspired stories in Native American folklore, including the idea that these plants mark the graves of old chiefs, and provide them a vessel with which to smoke from the afterlife.

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Indian Pipes

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Indian Pipes

Growing near the Indian Pipes, in the shade of American Beech was a rare treat, Tall Rattlesnake Root (Prenanthes altissima).  Though it may line the roadsides further east, it is known from only a few isolated locations in extreme eastern Texas.  Here it grows on steep hillside springheads and the banks of springfed streams in mature hardwood forests.

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Tall Rattlesnake Root

Ample rains in September fueled a profusion of fungi, whose fibrous filaments draw moisture from the earth and feed on the ample detritus beneath the leaf litter.  Fungi are fascinating, beautiful organisms.  They lead most of their lives hidden below ground, but grace us with a spectacular display when their fruiting bodies form.  Perhaps my favorites are the many varieties of coral fungus.  Each is unique, and contain an intricate maze of protrusions that seem crafted by some avant-garde architect.

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Coral Fungus

Many species of fungus are quite toxic to humans, but there are some that are said to be delicious.  I personally have never been brave enough to try wild mushrooms.  It seems like for every edible species there is a lethal, or at least debilitating look-alike.  One species that is favored by foragers is the Indigo Milk Cap (Lactarius indigo) which an be found in hardwood bottoms in late summer and early fall.

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Indigo Milk Cap

Fungi come in a staggering array of shapes and colors.  They are also fun to photograph, and lead the mind to find interesting angles and compositions with which to present them.

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Fungi (I believe these are chanterelles)

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Fungi

Autumn also signals the beginning of the salamander breeding season in East Texas.  In mid-October conditions were right for Marbled Salamanders (Ambystoma opacum) to make their annual breeding migrations.  Unlike most members of the family Ambystomatidae, which breed in the water during late winter and early spring, the Marbled Salamander breeds on dry land, and the females lay their eggs under woody debris within dry vernal pool basins.  They will then guard the eggs as they wait for winter rains to fill the pools and disperse and hatch their offspring.  By doing this they get a leg up on the competition, so to speak, which comes in the form of other amphibian larvae that won’t begin to develop for another couple of months.

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Marbled Salamander Male

Marbled Salamanders are one of relatively few amphibian species that are sexually dimorphic.  The males (pictured above) have bright silvery white dorsal patterns while the females (pictured below) have duller silver to coppery markings.  The males also display a swollen cloaca at the base of their tail during the breeding season.

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Marbled Salamander

In late October Caro and I spent a damp autumn day in the woods with our friends James and Erin.  It provided a chance to capture more images of interesting fungi, like these Earthstars, which look like little puff balls wearing tutus.

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Earthstars

We also observed a number of insects like these seemingly affectionate Six-spotted Flower Longhorn Beetles (Strangalia sexnotata).

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Six-spotted Flower Longhorn Beetles

We also found a few Rainbow Scarabs (Phanaeus vindex), a spectacular beetle that I highlighted in a previous blog post.

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Rainbow Scarab

And then there were the Indian Pipes.  We found hundreds in a remnant Longleaf Pine savannah, pushing up through the dense carpet of needles and cones.  It became somewhat of a game seeing who could spot the most.  Per usual, Caro won by a landslide.

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Indian Pipes

One October day I received a call from my wife that she had found a recently hit Gray Fox next to the road. Being eccentric biologist types, we decided that we wanted to try to get its skeleton for study and admiration. So we called James and Erin, who own a large tract of land, and asked if we could set it out there to decompose. Being a couple of biologists themselves, they gladly agreed and we loaded the fox carcass in the bed of my truck and set out on the half-hour or so journey to their farm.

Just after we arrived, I heard my wife call out, “Look at this!” No surprise really, as she has an uncanny talent for spotting creatures, plants, and any other thing that remains invisible to most. She had found a large adult female Carolina Mantis (Stagmomantis carolina), hiding among the goldenrod blooms near the Childress cabin.

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Carolina Mantis

Of course, in our haste to make our morbid delivery I had forgotten my camera.  Fortunately James was kind enough to lend me his. We approached the scene and I tried to formulate a plan on how to best photograph this spectacular insect. As we drew near we noticed the carcasses of Common Eastern Bumblebees (Bombus impatiens) scattered about the ground, dismembered and drained of their juices. Oblivious to the danger, there were several more bees nectaring on the goldenrod just inches from the mantis. So I found a good angle and waited to see if I might capture some action. I set the lens on a bee that was slowly creeping closer and closer to this devourer of pollinators. The bee brushed against the mantis’s leg, yet still the predator remained still. Its head slowly cocked and it’s antennae twitched ever so slightly. Deliberately and methodically it crept toward the ravenous bumble bee. Its movements were almost imperceptible. I captured the image below as it zeroed in on the bee and prepared its strike.

Seconds after I captured this image the mantis did strike, though I only managed to record a blur of green. It missed, and the bee flew to a distant part of the same plant to continue feeding. Later we would see the mantis in the middle of devouring another unfortunate Bombus impatiens, though we missed the strike. In all it would seem that this ruthless hunter his doing quite well on the goldenrod she has staked claim to.  She remained on that withering goldenrod well into December.

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Seconds from Disaster

A few days before Halloween, Caro and I set out to look for signs of fall along backroads and deep in the forest. Colors were beginning to change, with vines like Virginia Creeper and Poison Ivy putting on a brilliant display. Elms, hickories, and even some red maples were beginning to lose their chlorophyll while baldcypress was nearing peak color.  Monarchs are passing through en masse, and were joined at fall blooming plants by Gulf Fritillaries, Buckeyes, and American Ladies.

In the late afternoon we came across a stunning Canebrake Rattlesnake (Crotalus horridus) taking in the Sun’s fading warmth. It was one of the lightest snakes I’ve seen, with narrow bands of almost pure white along its chevrons. I would put it at a bit under three feet in length, a decent size. And like most of its kind that I’ve encountered it rattled only briefly, and was incredible docile and non-aggressive throughout our interaction.

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Canebrake Rattlesnake

After spending some time with this spectacular denizen of the deep woods, we were able to turn up a couple of Marbled Salamanders and Southern Leopard Frogs adjacent to a series of ephemeral wetlands. I then noticed a large fallen tree, its branches arching above the forest floor. While admiring the verdance of the mosses and Resurrection Fern coating the bark, I glimpsed an unusual creature swaying back and forth. It was a huge Megarhyssa atrata (a type of giant ichneumon) busy probing the chambers of horntail wasp larvae with her ovipositor. She lays her eggs in the soft flesh of these larvae, where they will hatch and consume their host as they develop. This downed tree was literally swarming with Megarhyssa atrata and M. macrurus. Though they may be “creepy” looking, these large insects are harmless and fascinating.

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Megarhyssa atrata

In early November we set out to look for Long-lipped Ladies’ Tresses (Spiranthes longilabris) a rare orchid of fire-maintained Longleaf Pine Savannahs.  A species of the coastal plain, they reach the western extent of their range in East Texas.  Uncommon to rare throughout their range, in Texas they are known from only a handful of sites in the Big Thicket.

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Long-lipped Ladies’ Tresses

Another East Texas rarity is the Kidney-leaved Grass-of-Parnassus (Parnassia asarifolia).  To my knowledge, they only persist along a single drainage in the Pineywoods.

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Kidney-leaved Grass-of-Parnassus

A favorite past time of Carolina and me is wandering around Ellen Trout Park here in Lufkin.  There are usually a variety of interesting things to be seen, including several resident Great Egrets (Ardea alba).

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Great Egret

The star attraction of the park, however, is a pair of Bald Eagles (Haliaeetus leucocephalus) that nest there each year.  It wasn’t so long ago that Bald Eagles were nearing extinction, but a variety of factors including the banning of DDT and Federal regulations like the Endangered Species Act and Bald and Golden Eagle Protection Act brought them back from the brink.

While most of East Texas’s species suffered greatly from the construction of large reservoirs, this is one of a few species that has actually benefited. The damming of the major rivers of the region created tens of thousands of acres of suitable habitat for the large raptors.  In East Texas, Bald Eagles prefer to nest near the top of large pine trees adjacent to large water bodies. I composed the image below to capture the essence of this habitat.

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Bald Eagle

By late November, fall color had begun arriving in earnest.  One one of our frequent evening drives, I spotted the stereotypical Pineywoods scene below along the backroads.

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Florida Maple (Acer floridanum) generally displays a brilliant golden yellow during autumn.  This year they put on quite a show on slopes and along riverbanks.

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Florida Maples

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Florida Maples

In some areas Florida Maples can be found growing alongside Red Maples (Acer rubrum).  In the fall, Red Maple comes in a variety of colors, including yellow, orange, and red.  In the image below it held up to its namesake, and provided an excellent contrast to the bright yellows of the Florida Maple next door.

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A Meeting of Maples

The Pineywoods of East Texas are known for their towering forests. While breathtaking in their own right, the abundance of trees blocks the horizon, and there are not many places in East Texas that offer broad views of the landscape. There are a few exceptions on high ridges, however, like this spot east of Nacogdoches. Here the crowns of pines and a diversity of hardwoods creates a beautiful fall palette of greens, oranges, and yellows.

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Bird’s Eye View

Many species of butterfly remain active well into the fall.  One of the most common is the Gulf Fritillary (Agraulis vanillae).  We often see them nectaring alongside other species on fall blooming wildflowers like these asters.

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Gulf Fritillary

In late November, Carolina and I made our way north to explore the forests of Cherokee and Smith Counties.  Here we found countless beautiful scenes, of which I attempted to capture just a small fraction of their brilliance with the images below.

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Dressed in Gold

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Autumn Exposure

During this day trip, we visited Tyler State Park for the first time.  The State Park system of Texas protects a multitude of important and interesting natural and cultural features.  The park was beautiful, with ample fall color among mature mixed pine-hardwood forests and infrastructure created by the Civilian Conservation Corps.

I generally avoid including man-made elements in my images, however the road through the state park seemed to be asking to be photographed.  I captured the image to remind me of one of my favorite past times – driving quiet back roads in fall…

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The Road to Autumn

…and hiking in the autumnal forest.  If you look closely in the image below you can see a hiker’s footbridge beneath Flowering Dogwoods with foliage aflame.

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Tyler State Park Trail

The color of the day was definitely orange, a deviation from the standard yellows and occasional reds typical further south.  The Red Maples in particular were glowing.  We enjoyed our time in the park, and will likely be making a repeat visit soon!

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Autumn’s Orange

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Maples in the Midstory

Some autumn scenes display a more subtle beauty.  I captured the scene below in the floodplain of the Neches River.  The Inland Sea Oats blanketing the ground had turned brown.  The bark of Sugarberries added contrast while the fall foliage of distant elms added a splash of color.

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All that Remains

Perhaps the most spectacular fall scene would not reveal itself until December, when I went to visit a waterfall recently discovered by my friend Scott.  This waterfall is hidden deep forest in an area where steep ravines funnel water, whose power carves shallow canyons into the erodible mudstone of the Wilcox Formation. The slopes that grade down to this stream are decorated with the golden autumn foliage of American Beech and likely harbor a vernal flora rich in peripheral species of the great Eastern deciduous forests.

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There are few things that bring me more joy than a walk in the autumn woods, and though the season has turned, it’s hard to fret too much.  Winter resident birds have arrived and salamanders have begun to breed.  Though winter may seem the bleakest of seasons, there is lots of life for those willing to look.  So for now, I will look forward to the winter and spring, and say, “until next time, autumn!”

Vernal Pools: The Kingdom of the Amphibians

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Ovipositing Spotted Salamander

There are few things more magical, few moments more memorable, and few experiences more rewarding than exploring a vernal pool in late winter and early spring.  I wish everyone could know the joy that I feel standing ankle deep in the frigid water amid a deafening cacophony of Spring Peepers and chorus frogs.

Vernal pools are isolated wetlands that form in upland depressions.  In the great forests of the eastern United States, of which the Pineywoods of East Texas are essentially an extension, they often occur in open, mature forests over pockets of dense clay scattered among a matrix of otherwise loamy soil.  They may also occur in the scars of old stream beds left after some waterway changed course millennia ago.  The unique topography of these areas result in pools that hold water during the winter and spring and dry in the summer and fall.

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A dry vernal pool in fall

Vernal pools begin to fill in the late fall and early winter with the return of regular rainfall patterns associated with frequent fronts.  At the same time trees and other plants are entering a period of dormancy, when their water requirements are reduced dramatically.  This reduction in plant activity results in a rising of the water table.  In more northerly climates the pools may not fill until the spring snow melt funnels water to them.  By later spring and early summer, the water table begins to drop as thirsty roots draw from it.  Evapotranspiration increases, and by late summer these depressions will be dry as a bone.

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A full vernal pool in late winter

The ephemeral nature of these wetlands means that fish are unable to survive here.  This does not mean that vernal pools are devoid of life, however.  A multitude of invertebrates specialize in vernal pools and a spectacular array of amphibians depend on them to breed.  It is, in fact, the absence of fish that allow these organisms to thrive here.  Without these voracious piscene predators, and with an abundance of invertebrate prey, amphibian larvae can flourish.

Many amphibians typical of eastern North America reach the southwestern extend in East Texas.  Most of these species breed during the first substantial warm rains of late winter and early spring, often undergoing mass migrations from upland refugia to reach the vernal pools.  Easily the most spectacular of these amphibians, and perhaps my favorite animal of all time, is the Spotted Salamander (Ambystoma maculatum).  These large, brightly colored members of the family Ambystomatidae are like the “poster children” of vernal pools.  Their fate is so closely tied to these unique habitats that they are indicator species for them.  And as healthy vernal pools depend on a healthy, mature forest, the Spotted Salamander is, in turn, an indicator species for the health of the entire forest.

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A male Spotted Salamander

Spotted salamanders spend the majority of their lives confined to small burrows, generally excavated by some species of rodent or other fossorial creature.  As the warm winter rains begin to saturate the soil they slowly emerge from their underground haunts and make their way, en masse, to the vernal pools of their birth.  The males arrive first.  They can be identified this time of year by their swollen cloacas.  When all is said and done they will outnumber the females several to one.  After entering the water they dutifully set out to find the perfect spot to deposit their spermatophore, a gelatinous deposit containing their genetic material.  Here they await the arrival of the females.

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A Spotted Salamander emerges from the leaf litter

When the females do arrive their are swollen with a gelatinous mass of eggs within.  The males dance and display around their spermatophore with a series of flips, gyrations, and underwater acrobatics.  Once they have caught the eye of a female they gently guide her over their spermatophore.  She picks it up with her cloaca and uses it to fertilize her eggs.  She then deposits an impossibly massive egg mass on a submerged twig or vegetation.  The salamanders do not dawdle in the ponds, and as soon as they arrived they return to their upland burrows.  Here they will remain for the rest of the year.  Part of what makes seeing a Spotted Salamander so special is knowing that they are only visible to the above-ground world for a few shorts weeks of the year.

The salamander eggs are protected by a thick gelatinous mass that is resistant to desiccation should the pool dry for a short time during their development.  The Spotted Salamander have a mutualistic relationship with an algae, Oophila amblystomatis, which is found exclusively within the salamanders’ egg masses.  The algae benefits from the nitrogen-rich waste products produced by the developing embryos while the embryos themselves are oxygenated through the biproducts of the photosynthesizing algae.

Eventually tiny, legless gilled salamander larvae will emerge from the egg masses.  They will feed and grow within the vernal pools until sometime in late spring when their legs and lungs are fulled developed.  They will then absorb their gills, lose their tail fins, and emerge from the water to begin a terrestrial life.

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Spotted Salamander Egg Mass

There are other species of salamander that utilize vernal pools.  The Mole Salamander (Ambystoma talpoideum) is a small, stocky salamander of the southeastern United States.  They occur in a variety of ephemeral wetlands, from vernal pools to permanent fish-free ponds within longleaf pine savannahs.  Populations in East Texas often contain both terrestrial and neotenic adults.  In neoteny, adults retain juvnile characteristics; in this case gills and aquatic morphology.  These neotonic adults enjoy an entirely aquatic existence, even breeding in the water.  If the pool begins to drain, however, these aquatic adults can absorb their gills and morph into terrestrial adults.

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Mole Salamander

In East Texas, Smallmouth Salamanders (Ambystoma texanum) seem to be most common in large ephemeral wetland complexes in floodplain forests.  They will still utilize traditional vernal pools, however.  They are variable in pattern, having a variety of lichen-like blotches and flecks ranging from blue-gray to rusty brown.  In Texas they occur in scattered populations throughout much of the eastern third of the state.

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Smallmouth Salamander

The Marbled Salamander (Ambystoma opacum) is an anomaly.  While the other Ambystomatid salamanders in East Texas breed in the late winter/early spring, the Marbled Salamander breeds in the fall, when the vernal pools are still dry.  During autumn’s first cool rains they migrate to the dry pool basins.  Here they breed on the land, and the female deposits her eggs on dry earth beneath logs and other natural debris within the depression.  Here she will stay, guarding her eggs, until the winter rains fill the pools and inundate the eggs.

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A female Marbled Salamander guarding her eggs.

There is method to this madness, however.  By the time the eggs of the Spotted, Mole, and Smallmouth Salamanders have hatched, the Marbled Salamander larvae have been growing for weeks.  What ensues is a mass slaughter of intra-generic predation, as Marbled Salamander larvae consume hundreds of their congenerics.  This spring we observed hundreds of Spotted Salamander egg masses, and most had at least one Marbled Salamander larva sitting atop them.  For a short while at least, the Marbled Salamander is the king of the vernal pool.

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A male Marbled Salamander

Marbled Salamander adults are sexually dimorphic.  Males have bright white to silvery dorsal markings while the markings of the female are a duller silver or copper.  Males arrive to the dry pools first, and as with the Spotted Salamander, significantly outnumber the females.

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Marbled Salamander male (upper right) and female (lower left)

The above mentioned salamanders all have fascinating life histories, but they pale in comparison to the complexity of the life cycle of the Central Newt (Nothophthalmus viridescens louisianensis).  The Central Newt starts life as an aquatic larva emerging from eggs laid in the water.  After a short time they morph into a terrestrial juvenile known as an “eft”.  During this time their skin is noticeably dry to the touch.  After spending a couple of years on land, these juveniles typically return to the water, where they will morph again into an aquatic adult.

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Central Newt Eft

To those exploring a vernal pool at night, their eyes are undoubtedly drawn to the salamanders swimming below the water’s surface.  Their ears, however, belong to the frogs.  Depending on the time of year, a multitude of intricate frog calls may ring out, often in deafening spectacularity.  One of the best known of these anurans is the Spring Peeper (Pseudacris crucifer).  These tiny harbingers of spring fill the night air with their peeping calls that seem too loud to come from such a tiny thing.

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Spring Peeper

Our East Texas representative of the Pseudacris feriarum complex is the Cajun Chorus Frog (Pseudacris fouquettei).  These diminutive frogs seem to breed just about anywhere that water remains for more than a few weeks.  Their call has been likened to a finger running through the teeth of a comb.  In my area P. fouquettei typically starts calling in early to mid December.  I have found many a good vernal pool by following the calls of the Cajun Chorus Frog.

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Cajun Chorus Frog

The Gray Tree Frogs (Hyla chrysoscelis and Hyla versicolor) typically begin breeding in mid Spring, later than the Spring Peeper and Cajun Chorus Frog.  The two species of Gray Tree Frog can only be differentiated by their calls.  In East Texas they typically begin calling in late February/Early March, and may call well into the summer following heavy rains.

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Cope’s Gray Tree Frog (Hyla chrysoscelis)

Perhaps my favorite anuran inhabitant of vernal pools is the Pickerel Frog (Lithobates [Ranapalustris).  They can be differentiated from the similar Southern Leopard Frog by the two rows of large-block like blotches on their back and bright yellow inner legs.  While they are common throughout much of their range, the Pickerel Frog is uncommon in East Texas.  Along with the Southern Leopard Frog, it is one of the earliest breeding Ranids in the Pineywoods.  The Pickerel Frog is known for its toxicity.  Some people who handle these frogs report sensations from mild tingling to moderate pain in their fingers afterwards.  Fortunately I have never had a reaction.  They are also toxic to other amphibians, and may kill other species that are confined to plastic bags with them.

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Pickerel Frog

The Southern Leopard Frog (Lithobates sphenocephalus [Rana sphenocephala]) is one of our commonest Ranids.  I remember the first time I heard their haunting call.  I thought I was listening to some dispute between raccoons or some similar mammal.  Southern Leopard Frogs are quite variable, but their spots are always smaller and more randomly distributed than those of the Pickerel Frog.  They also lack the bright yellow inner legs of their toxic cousins.

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Southern Leopard Frog

The annual amphibian migration to vernal pools is truly one of nature’s great spectacles.  I remember one night a few years ago when Carolina and I, accompanied by some of our closest friends, went out to a vernal pool at night.  A warm front had moved in, drenching East Texas with bands of rain throughout the day and into the night.  As we began travelling to our destination the rain began to pick up, and branched lightning descended from the clouds, dancing across the sky and illuminating the columns of shadow in the dark forest. I was full of anticipation and doubt as we approached the pond. Though the conditions seemed perfect, I had tried this very thing before and turned up empty handed.

Almost inexplicably, at nearly the exact moment we arrived at the pond, the rain had stopped. I rushed to the ponds edge, flashlight in hand. Immediately it became clear that all of my doubts were for naught. As my light crossed the leafy bottom of the vernal pool I could see hundreds of yellow spots; Spots decorating the backs of dozens of Spotted Salamanders that darted back and forth beneath the clear water. We did it, I thought, we timed it perfectly. The calm night was interrupted by the voices of innumerable Cajun chorus frogs that sang from the pool’s edge. It was, without a doubt, one of the most incredible natural events I had ever witnessed.

It was at that moment, when I thought that things couldn’t be more perfect, that my heart could not be more whole, that Carolina said, “look at the sky.” I looked up and saw that the clouds had broken, and in their wake the brilliance of millions of stars shone in the moonless night sky. And though I may be a secular person, the sensation I felt at that moment was no less profound than some deeply religious experience. For the most incredible moments in life need not be some miracle brought on by divine powers, but rather the countless natural wonders of the very world to which we all are a part.