The coral snake, picture 5, is very venomous. The American crocodile is only found in Florida. Crocodiles are lighter in color, bigger, and have a long narrow snout. Alligators are dark green, and have a short, wide snout. Depends on the size of the alligator.
Alligators eat all kinds of animal.
Feel lucky to see a snake. Most snakes are not aggressive. The smallest snake is the blind snake. The kingsnake is not venomous but the coral is. The yellow rat snake in picture 16 is eating a mouse.