Aquatic insects are common in paddy fields and ponds, where frogs and fish are abundant. Therefore, we have been investigating the anti-frog and -fish defences of aquatic insects. 

   I found active escape of the aquatic beetle Regimbartia attenuata (Coleoptera: Hydrophilidae) from the vents of frogs via the digestive tract.

Publication

Sugiura, S. (2026) Small prey fight back: post-capture defences shape prey–predator size relationships. Scientific Reports, 16: 7198. 

Sugiura, S. (2025) Effects of predator species and size on prey escape success through the digestive tract. Ecology and Evolution, 15(12):  e72477.

Sugiura, S. & Hayashi, M. (2024) Defenses of whirligig beetles against native and invasive frogs. PeerJ, 12: e17214.

Okai, K. & Sugiura, S. (2023) Death feigning in adult diving beetles (Coleoptera: Dytiscidae). Journal of Asia-Pacific Entomology, 26(2):102082.

Sugiura, S. (2020) Active escape of prey from predator vent via the digestive tract. Current Biology, 30(15): R867–R868.