Parasitic bees

A parasitic species of solitary bee, sometimes called cuckoo bees, lay their eggs in the nest of other bees, the hatched larvae eat the pollen and honey intended for the larvae of the host. Some cuckoo bees, which look rather like bumble bees, lay their eggs in bumble bee nests and their young are cared for by the bumble bee workers who, rather like the cuckoo bird, seem not to notice the difference.