Last year we saw our first blacklegged tick of the season in March. We’ve seen none yet this year but they come out when the temperature is above 4C so we’re back to doing daily tick checks and using sticky rollers on the dogs. April, October and November are big months for adult ticks in southern Ontario. In between, the much smaller nymphs are more common.
Geneticks has released its 2021 Canadian tick testing data. This is a private lab that identifies tick species and tests blacklegged ticks for Lyme and other pathogens. If you find an engorged tick on you, you can mail it to them. They only have data on ticks that were submitted to them so you can't generalize too much from their statistics. If you click to see data by Public Health Unit, some of the hot spots stand out.
https://www.geneticks.ca/tick-testing-statistics/?...