MYN / Paul Marcellini / Sequence of an American alligator (Alligator mississippiensis) hatching from its egg, Palmdale, Florida, USA. Digital composite.

Ingo Arndt / American alligator (Alligator mississippiensis) split level, Everglades, USA, January.

Ingo Arndt / American Alligator (Alligator mississippiensis) split level, Everglades, USA, January.

Ingo Arndt / American Alligator (Alligator mississippiensis) in water, Everglades National Park, Florida

Pete Oxford / American Crocodile (Crocodylus acutus) nest excavated by nesting female Green Iguana (Iguana iguana), Banco Chinchorro, Yucatan Peninsula, Mexico

Scott Leslie / American Alligator (Alligator mississippiensis) juvenile, Florida

Luciano Candisani / Jacare Caiman (Caiman yacare) young in wetland, Pantanal, Brazil

Luciano Candisani / Jacare Caiman (Caiman yacare) two weeks old young in wetland, Pantanal, Brazil

Luciano Candisani / Jacare Caiman (Caiman yacare) waiting for fish to swim through open mouth in wetland, Pantanal, Brazil

Luciano Candisani / Jacare Caiman (Caiman yacare) standing on bottom of wetland, Pantanal, Brazil

Luciano Candisani / Jacare Caiman (Caiman yacare) swimming away, wetland, Pantanal, Brazil

Luciano Candisani / Jacare Caiman (Caiman yacare) waiting for fish to swim through open mouth in wetland, Pantanal, Brazil