15 Amazing Birds That Can Swim and Fly Birds are some of the most ... Their diet consists of fish, eels, and water snakes.

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These snakes dubbed the infamous rhyme ... Cottonmouths are semi-aquatic, meaning they can swim and prefer moist or wet living conditions. Cottonmouths have large venom-filled jowls.

They feed on small animals like birds, frogs and other snakes, too. A bite from a timber rattlesnake can be serious, but if there is good news it is that they can often be fairly docile ...

The West African gaboon viper has the longest fangs of any snake. In a 6ft (1.83m) long specimen they measured 2in (50mm). Snakes don’t blink as they have transparent eyelids that are fused shut.