We saw these startlingly blue birds in the oak groves in Western Oregon and weren't quite sure what species they were, but couldn't help but try and get some shots of them. We found out one really interesting fact about these birds. The Western Scrub-Jay feeds on parasites on the body of mule deer, hopping over the body and head of the deer to get them. The deer often help the jays by standing still and holding their ears up.