Reciprocal altruism refers to the behavior of mutual benefit between two unrelated animal individuals through mutual cooperation
Pure altruism means that individual animals perform altruistic behavior to other individuals who are not related to each other, without pursuing any objective reward for themselves
When the hare is hiding in the bushes, several eagles will temporarily form a cooperative group, and one or more of them will drive the hare out, and the others will swoop down from the air to kill the hare