Woodhouse's scrub-jays that hold funerals for dead birds by making loud noises and avoiding the corpse, behavior that may be warning other birds of fatal threats. Northern mocking birds that recognize individuals who may threaten their nests and attack only those individuals rather than attacking all passersby indiscriminately. Aplomado falcons that hunt cooperatively in pairs and thereby increase their hunting success by a large margin through this teamwork. Jays that hide hundreds of seeds and nuts in fall and manage to retrieve the majority of them over the course of the winter, exhibiting great recall for hiding places.
