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. 2020 Nov 16;17:34. doi: 10.1186/s12983-020-00373-x
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Additional file 2 Video 2. High-speed movie from an anterio-lateral perspective, showing a mid-metamorphic I. alpestris processing a lake fly larva (Chironomidae) under water. Five full processing cycles can be observed, cycle 1, 4, and 5 are mixed, or immediately followed, by transport movements. Note how the tongue cyclically rasps the prey along the palate. The movie was recorded at 500 Hz and is played back at 50 Hz, which corresponds to 10% of the actual speed.