Tui De Roy / Nazca booby (Sula granti), adult killing chick. Genovesa Island, Galapagos.

Tui De Roy / Nazca booby (Sula granti), adult attacking chick. Genovesa Island, Galapagos.

Nick Garbutt / Leopard (Panthera pardus) female with one of its cubs killing a feral / domestic dog on rocky outcrop. Jawai / Bera in Rajasthan, India.

Ingo Arndt / Honey bee (Apis mellifera) worker killing a drone in late summer, Germany

Ingo Arndt / Honey bee (Apis mellifera) workers killing drone after mating season, Germany.

Ingo Arndt / Honey bee (Apis mellifera), worker bee killing drone after mating season, Germany

Ingo Arndt / Honey bees (Apis mellifera) attacking a hornet (Vespa crabro). Honeybees survive a 1 degree Celsius higher body temperature than hornets. When they attack the hornet, they cover it, heat their own bod...

Ingo Arndt / Honey bees (Apis mellifera) attacking a hornet (Vespa crabro). Honeybees survive a 1 degree Celsius higher body temperature than hornets. When they attack the hornet, they cover it, heat their own bod...