Bombus citrinus, commonly known as the Lemon Cuckoo Bumblebee, is notable for its vibrant yellow coloration. This species is a social parasite, lacking a worker caste and instead infiltrating nests of other bumblebees. Found in North America, it prefers open fields and meadows, playing a unique role in pollination despite its parasitic lifestyle.

Bombus citrinus, commonly known as the lemon cuckoo bumblebee, is native to North America. It is primarily found throughout the eastern regions of the United States and parts of southeastern Canada.

Bombus citrinus typically inhabits temperate environments with a preference for open fields, meadows, and gardens where host bumblebee species (such as members of the subgenus Pyrobombus) are found. These areas provide access to floral resources and suitable nesting sites.

As a parasitic bumblebee, Bombus citrinus does not construct its own nests. Instead, it invades the nests of other bumblebee species, where it relies on the host workers to rear its young. This behavior influences its habitat preferences, as it must locate regions with abundant host species nests. Bombus citrinus plays a unique role in the bumblebee community by influencing host population dynamics.