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Lungless Salamanders: Plethodontidae - Diet

water lungs eat crustaceans

Lungless salamanders eat small crustaceans and insects but sometimes eat worms. Larger species sometimes eat smaller species. Lungless salamanders capture prey with an explosive flicking of their tongue. Crustaceans (krus-TAY-shuns), such as crayfish, are water-dwelling animals that have jointed legs and a hard shell but no backbone.

WHERE DID THE LUNGS GO?

Lunglessness is thought to have evolved as an adaptation for life in flowing water. Larvae are small, and lungs would tend to act as air sacs that might make the salamander float in the water. This would dislodge them from their food source and threaten their survival. Water in a stream is constantly being mixed with air, and salamanders can breathe through their skin, so there is little natural selection for keeping lungs.

Lungless Salamanders: Plethodontidae - Behavior And Reproduction [next] [back] Lungless Salamanders: Plethodontidae - Physical Characteristics

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