September 27, 2025

Box-headed blood bee

Box-headed bees are medium-sized black bees with red abdomens. They exhibit a cleptoparasitic behaviour, targeting various Furrow bee species.

Box-headed blood bee
Sphecodes monilicornis

Conservation status: Common

When to see: March to September

About

Box-headed blood bees are medium-sized black bees with red abdomens. They exhibit a cleptoparasitic behaviour, targeting various Furrow bee species. The females of these bees forcefully infiltrate pre-stocked nest cells, eliminating the resident egg or grub, and subsequently substituting it with their own offspring before sealing the cell once again.