Cuckoo Bees

Cuckoo Bees (also referred to as cleptoparasites), lay their eggs in the nests of other bees, similar to the behavior of cuckoo birds. Female cuckoo bees the lack pollen collecting structures (the scopa) of their host bees and do not construct their own nests.

They typically enter the nests of pollen-collecting species, and lay their eggs in cells provisioned by the host bee. When the cuckoo bee larva hatches it consumes the stored pollen and, if the female cuckoo bee has not already done so, kills and eats the host larva. Cuckoo bees parasitise both solitary bees and bumblebees.
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