![John Singer Sargent - Muddy Alligators (1917)](http://totehugh.es/blog/wp-content/uploads/Sargent-Muddy-Alligators-1917.jpg)
- Some crocodilians 1 bait birds by putting nest-worthy twigs on their snouts. When a bird flies down to pick up the twigs, the crocodilian lunges up and eats it.
- Crocodilians use gastroliths for digestion and maybe also for buoyancy and balance.
O.crocodilia contains three families: f.gavialidae, the gharials and false gharials; f.alligatoridae, the alligators and caimans; and f.crocodylidae, the crocodiles.