Arthropods Daily – Issue No. 690 No. 690 | July 8, 2025

Cuckoo bumblebees are members of the subgenus Psithyrus in the bumblebee genus Bombus. Until recently, the 29 species of Psithyrus were considered to constitute a separate genus. They are a specialized lineage which has lost the ability to collect pollen and to rear their brood. They have lost the worker caste and produce only sexuals, male and female. They are inquilines in the colonies of other bumblebees. Before finding and invading a host colony, a Psithyrus...

Ancestry Graph

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This is not intended to be a dry lexicon. Personal stories and sensitive articles form the framework for our pictures: „Explained as easy as pie — The biggest threats to bees“ Bees are essential for pollinating many plants and face significant threats from parasites, diseases, pesticides, and environmental changes.

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„Cuckoo Bumble Bees“ also appeared in the following editions of Arthropods Daily

No. 690 | July 8, 2025