Once just a pet project of insect collector Georges Brossard, the Insectarium officially opened in 1990 within the Montreal Botanical Garden. More than 150,000 arthropods—of which insects are a sub-group—are on display at the museum. These include live displays such as the leafcutter anthills, a stick insect vivarium, and a diving beetle aquarium. The park location allows the honeybees and bumblebees from the Insectarium's hives to harvest nectar. In September, entomologists tag and release Monarch butterflies for their southern migration.