Amphiumas spend most of their time foraging in the bottom of streams, hunkering down beneath leaf litter and vegetation.
Amphiumas love crayfish, but they'll eat anything they can get in their mouths, including aquatic insects, worms, and tadpoles.
When small bodies of water get hot, oxygen levels plummet, and that's when amphiumas will sometimes rise to the surface and gulp air, a talent that newts and tadpoles also possess.
One day, after setting several traps in a heavily vegetated pond in the Five Forks unit of Petersburg National Battlefield, he and his colleagues made an unexpected discovery: an enormous black salamander called a two-toed amphiuma.
North America's largest salamander, the two-toed amphiuma (Amphiuma means) grows to nearly four feet long and resembles a big black eel with scrawny little legs.