Bumble bees and honey bees on lowland heaths: competition or coexistence

Bumble bee Bombus lapidarius just leaving an Erica cinerea

Franklin, E., Carroll, T., Blake, D., Rickard, K. & Diaz, A.

Honey bees are under significant scrutiny regarding their potential for competition with wild bees. Honey bees and short tongued bumble bees are more likely than some to be in competition with each other. This is due to them having similar tongue lengths, restricting them to flowers with a similar depth. This potential for competition will only increase as the variety of flowers and their abundance decreases. 

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Read the scientific publication in JPE.