"Brumation" illustrated

"Brumation is a term used to refer to dormancy of reptiles, which is metabolically somewhat different from mammalian hibernation.

The video above shows alligators lying dormant, not in tunnels in mud, but right in a frozen-over pond, with just their nostrils protruding above the ice.

If anyone has even the faintest doubts about the survival capabilities of this superpredator, this video should change your mind.

Reposted from 2018 to add a photo and excerpted text from the Minnesota Star Tribune:

“If the ice is clear, you can sometimes see snapping or painted turtles moving slowly under the ice,” said Jeff LeClere, zoologist and amphibian and reptile specialist with the Minnesota Biological Survey.

“All of Minnesota’s nine species of turtles overwinter aquatically,” he said.

This winter dormancy, called brumation, requires them to be deep enough to avoid being fatally frozen in ice and to slow their metabolism drastically to conserve energy. Most don’t move at all once this turtle equivalent of hibernation begins. It also minimizes their need for oxygen, which they absorb from the frigid water through a process called cutaneous respiration...

Softshell turtles tend to bury themselves about an inch beneath sand, silt or gravel, while other species sidle under logs or rocky nooks. Map turtles like to congregate along the wing dams, which are rock structures along navigation channels of the Mississippi River, LeClere said. Having shelter can lessen the threat of winter predators such as otters...

Some turtles, such as painted or snapping turtles, simply seek the right depth at the bottom of a lake or pond. They may congregate in areas where natural springs or a lack of shade encourages quicker melting — with vital access to sunshine and food — in the spring.

The embedded image is a screencap from a video posted at this Field Ecology Blog.