Société d'herpétologie du Canada
Ontario has 25 species of reptiles. This is substantially more
than any other province, as Québec (the second most diverse province) has ony 15
species. Many of Ontario's species are not found anywhere else in Canada. These
species are generally limited to southwestern Ontario, the warmest part of the
province. Ontario is the only province with more than one species of rattlesnake
(although the Timber Rattlesnake has been extirpated from the province).