Chihuahuan Ravens in south central Colorado

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It is has been some time since I found clear Chihuahuan Ravens in my area. Usually I find ravens that are likely hybrid Chihuahuan-Common Ravens or just those whose characteristics are intermediate. Correctly identifying Chihuahuan Ravens in Colorado is fraught with hazards as explained in this Colo Field Ornithologists journal article and I am not inclined these days to call one a Chihuahuan without some definitive field marks. This raven and a second one showed the definitive field mark of having nasal bristles clearly more than half the length of the bill. Of less reliability they appeared to have thicker (deep) bills and the throat feathers look less shaggy than those found on Common Ravens. SeEtta

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