Researchers are tracking and identifying ticks in Canada because of concerns that climate change is allowing the disease-carrying parasites to spread further north. We talk to Robert Colautti, an associate professor in the department of biology at Queen’s University in Kingston, Ont., and a member of the Canadian Lyme Disease Research Network; and Jade Savage, a professor in the department of biological sciences at Bishop’s University in Sherbrooke, Que., who runs a tick-tracking website and app called eTick.