 Bioko drills are also known to consume animals, including most commonly; beetles, land crabs and other crustaceans, millipedes and hymenopterans, a class that includes ants, flies, wasps, and the African giant snail.In one instance, the remains of rodents and frogs were found in faecal matter of a drill, and they have also been noted to forage for marine turtle eggs on beaches.Additionally, the drill's response to distress calls of duikers may be indicative of their willingness to consume them.