She has been studying the ecology and conservation of native pollinators and pollinated plants for over a decade. Her research has examined threats such as pathogen spillover from managed bees to wild bees, pesticide use, climate change and habitat loss. She recently co-authored The Bumble Bees of North America: An Identification Guide (Princeton University Press, 2014) and The Bees of Toronto (Toronto Biodiversity Series, 2016).