Dividing Line: Where Bighorn Meets Thinhorn

In the early 1970’s a bighorn sheep (Ovis canadensis) skull estimated to be 9280 years old was unearthed in a gravel pit just south of the Peace Arm of the Williston Reservoir, just north of Mackenzie, BC. This discovery supports the theory that bighorn sheep and thinhorn sheep (Dall’s and Stone’s)are evolutionarily distinct from each other and the Peace River is the historical border of the two species’ distributions.

Source:

: Rutter, N. W., V. Geist, et al. (1971). “A bighorn sheep skull 9280 years old from British Columbia.” J. Mammalogy 53(3): 641-644.

Further Reading:

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s