Sight is also important in identifying kinds of prey, such as those with a large energy content and or that may be distasteful or harmful. For example, toads learned to reject bumblebees by sight alone. Amphibians also use smell and hearing to hunt prey. Some species of toads can locate prey just by smell alone. Smell sense is of great value in tracking the prey, once it is located.
Some amphibians can also detect insects by the sounds they make.
A species of toad, Bufo marinus, is attracted to calling insects. Many caecilians and large anurans use fang like teeth to hold struggling prey. The tongues of amphibians have glands that produce a sticky substance, that immobilizes the prey. Terrestrial caecilians feed primarily on long prey, such as earthworms located on the ground or in burrows. Prey capture involves a slow approach towards the prey until contact is almost made, then the prey is captured by a powerful bite.