Newer birders may not be aware of my somewhat prophetic Collared-Dove paper that appeared now almost 25 years ago. Thanks to modern technology and the generosity of the birding-ornithological establishment, it can still be seen at http://elibrary.unm.edu/sora/NAB/v041n05/p01371-p01380.pdf It still might help a few folks. Enjoy!

Bill Smith
Salmon Creek