It is the policy of the City of Toronto to leave bee, wasp and hornet nests in trees where possible given the benefits of these species in pollination and as a natural control agent for other insect pests. Nests which are in a tree and located more than 3m above ground level are typically not removed as these do not pose a threat to human safety. The City of Toronto will remove the nests of bees, wasps and hornets from trees which are situated near sidewalks and other public spaces if the nest is deemed to be a safety concern to the public. Staff will inspect the site and decide on appropriate further action.
These nests are often most visible in the fall and winter when tree branches are bare; However, removal of nests at this time is not necessary as the insects, which remain in the nest, do not survive the winter season. Only the queens survive to overwinter in sheltered locations outside of the nest. Wasps and hornets will not return the following year to reuse an old nest.
Nests may be active from July to October.
To report a concern about a bee, wasp, or hornet nest in a City tree from July to October submit a Service Request – City of Toronto or call 311.