American alligator ~ Alligator mississippiensis
If you’re anxious for blue skies, light breezes, and spring’s moderating temperatures, you’re not alone. Retreating before winter’s onslaught, the cold-blooded among us took to mud, rock crevices, and brushpiles to protect themselves from the unforgiving season. Now, lengthening days and sunlit hours are tempting the reptiles into the open, ready to bask in the rising warmth.
In southeast Texas, the sight of an alligator basking on a bayou bank is as sure a sign of spring as dandelions or daffodils. Alligators don’t hibernate, but when cold weather comes calling, they undergo a period of dormancy called brumation. As temperatures drop, they excavate tunnels or depressions in the mud to serve as winter retreats. Once the temperature drops below 70 degrees, they stop feeding; below about 55 degrees they enter dormancy, slowing their metabolism and becoming lethargic.
Alligators brumating on the bottom of bayous or swamps still are able to respond to temperature changes and to move; from time to time they’ll resurface to breathe. Occasionally one can be spotted with only its nostrils visible while it catches some breath before slowly sinking back into its protective mud.
Red-eared slider ~ Trachemys scripta elegans
Red-eared sliders, Texas’s most common aquatic turtle, prefer quiet, slow-moving waters with mud bottoms, but they’re highly adaptable and can tolerate anything from brackish waters to man-made ponds. Like alligators, they’re cold-blooded and rarely leave the water except to bask, sunning themselves on convenient rocks and logs.
Basking turtles also remain buried in mud during the winter months, living off stored fat deposits while their metabolism slows. Below 50 degrees, they become nearly motionless, rising to the surface only occasionally for food, water, or air. On especially warm days they may become active, leaving the water to bask at the surface, but when the temperature drops, they return to the mud and a state of brumation.
Northern cottonmouth ~ Agkistrodon piscivorus
It’s common enough for rattlesnakes to emerge and prowl Galveston’s dunes on warm winter days, but the presence of a northern cottonmouth on a Brazoria Wildlife Refuge road was unexpected. Also known as water moccasins, these snakes can be found around swamps, sloughs, irrigation ditches, rice fields, and salt marshes.
As temperatures drop, they also enter brumation, sheltering underground or in isolated crevices to wait out the cold. Like alligators and turtles, they don’t fully sleep, but they become much slower and less active: not eating, but taking an occasional drink of water, or venturing out to warm themselves in a sunny spot.
Snake sightings are less common in winter than in spring and summer, but on sunny days after cold nights, it’s worth watching for them.
Not a snake in the grass, but a sunning snake in the gravel
Another common Texas reptile, this fine example of what I take to be a prairie lizard (Sceloporus consobrinus) inhabits grasslands with sparse vegetation, open canopy oak-hickory forests, and sandy soils of upland pine forests like those found in the Big Thicket.
Generally terrestrial, it will climb logs, fence posts, and trees to escape danger, and often basks on fallen debris or rocks as it takes in the winter sun. Otherwise, like its reptilian friends, it seeks shelter in burrows and engages in brumation when conditions turn cold, waiting like multitudes of humans to enjoy another season in the sun.
East Texas lizard ~ Definitely Sceloporus, and possibly consobrinus

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