Top Results for Psithyrus

Bombus suckleyi, commonly known as Suckley's cuckoo bumblebee, is a North American insect that operates as an obligate social parasite. Lacking its own worker caste, the parasitic queen invades the nests of other bumblebee species, particularly targeting resource-rich colonies of orange-belted bumbl...

Bombus rupestris is a species of cuckoo bumblebee in the family Apidae, widely distributed across Europe. As an obligate social parasite, it lacks its own worker caste and instead has queens that infiltrate and take over colonies of the red-tailed bumblebee (Bombus lapidarius), using the host worker...

Bombus campestris, commonly called the field cuckoo bumblebee or field cuckoo-bee, is a Eurasian species of parasitic bumblebee. It does not produce a worker caste; a female enters a nest of a host bumblebee, takes over the colony's reproductive role, and uses the host workers to rear her offspring....

Bombus sylvestris, commonly called the forest cuckoo bumblebee, is a species of cuckoo bumblebee found across much of Europe and in parts of Russia. It is a social parasite: the female enters a nest of another bumblebee, usually Bombus pratorum, suppresses the host queen's reproduction, and lays egg...

Bombus insularis is a North American cuckoo bumblebee, a social parasite in the genus Bombus and the group historically treated as the subgenus Psithyrus. A female enters a colony founded by another bumblebee species and uses the host workers and stored resources to rear her own offspring rather tha...

Bombus citrinus, the lemon cuckoo bumblebee, is a parasitic bumblebee in the subgenus Psithyrus. It does not establish a normal worker-producing colony or rear its own young; instead, a female enters a nest of a host bumblebee and uses that colony to raise her offspring. The species is most common i...