What primary threat causes the Eastern Fox Snake population to decline in areas like southwestern Ontario?

Answer

Road mortality, as the snakes bask on warm pavement.

Road mortality is a critical, immediate threat because the snakes are large, slow-moving, and frequently bask on warm pavement, making them vulnerable to vehicles.

What primary threat causes the Eastern Fox Snake population to decline in areas like southwestern Ontario?
rarityreptilevenomoussnakeElaphe vulpina