Mourning dove
After mating, the male shows the female all the possible nest sites, and lets the female choose one and build the nest. The male will fly about, get material, and bring it to her. The male stands on the female's back to give the material to the female, who builds it into the nest. The nest is made of twigs, conifer needles, or grass. Sometimes, mourning doves will take place of the unused nests of other mourning doves, birds, or mammals such as squirrels.