Because alligators are ectothermic, they have to rely on external sources of heat to regulate their body temperature.

Gasps can be heard by tourists on a swamp boat tour in south Louisiana as their guide jumps in the water to feed chicken and marshmallows to two alligators. At one point the guide puts a marshmallow ...

Because alligators and crocodiles are ectothermic, they have to rely on external sources of heat to regulate their body temperature, according to the Florida Fish and Wildlife Conservation Commission.