A Mozambique rain frog waggles its feet when offered a mealworm, and the sound recording (from both toes) indicates that the motion taps out strong vibrations, which could play a role in nabbing prey.
Posted in 'Morse toad: When amphibians tap their toes' at sciencenews.org/view/generic/id/38412/title/Morse_Toad_When_amphibians_tap_their_toes
Source: Sloggett & Zeilstra. 2008 Animal Behaviour
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