The world's largest land mammals are also one of the most socially complex.  Female elephants rarely separate from their matriachial group, except in death or when captured.  In death, elephants go through a complex mourning process and are sometimes unwilling to separate from their departed sister or mother for days.

Elephant society has parallels with human society in birth as well as death.  Like people, African Elephants will self-medicate by chewing on the leaves of a tree from the Boraginaceae family, which induces labor.