The David Suzuki Foundation has a new enemy in its climate crusade: the lowly — some would say lovely — honey bee.

After years of encouraging and educating backyard beekeepers on how to raise and feed the perky pollinators, Canada’s elder enviro activist is now telling them buzz off.

That’s because a study from Concordia University in Montreal suggests urban bees are squeezing out more than 150 species of wild bees that have been pollinating the local flora for thousands of years.