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Tree Bumblebee (Bombus hypnorum)

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description Tree Bumblebee (Bombus hypnorum) Overview

Bombus hypnorum, commonly known as the tree bumblebee, is a species of bumblebee characterized by its distinct color pattern of a brown thorax, black abdomen, and white tail. Originally native to mainland Europe and Asia, it notably expanded its range into the United Kingdom around 2001, establishing itself as a successful colonizer. Unlike most bumblebee species, it prefers to build its nests above ground, frequently occupying tree hollows or artificial bird boxes. It is highly adaptable to temperate urban environments.

help Tree Bumblebee (Bombus hypnorum) FAQ

Why are tree bumblebees often found in bird boxes?

Bombus hypnorum naturally favors above-ground cavities, including hollow trees. Bird boxes, roof eaves, and spaces in buildings reproduce that type of sheltered nesting site.

When did Bombus hypnorum arrive in the United Kingdom?

The first confirmed British record was made near Landford in Wiltshire in July 2001. The species subsequently spread through much of England, Wales, and Scotland and reached Ireland in 2017.

How can I identify a tree bumblebee?

It has a ginger-brown thorax, a mostly black body, and a contrasting white tail. That three-color pattern is more distinctive than the multiple yellow bands seen on Bombus hortorum.

Why are male tree bumblebees hovering around a nest entrance?

Groups of males may patrol or hover outside an established nest while waiting for new queens to emerge. This behavior can look defensive, but the males have no sting and are primarily interested in mating.

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