- #211
Astronuc
Staff Emeritus
Science Advisor
2023 Award
- 22,195
- 6,878
I was thinking between adult or juvenile, i.e. 2 nd yr, before the adult plummage develops. Then there is the matter of sexual dimorphism which adds to possible variations.
On the other hand, the red-tailed is the most common hawk, is about the right size, and has many variations. But all white underneath and grey on top is a stretch.
Now the Gyrfalcon has a white variation, but they tend to be further north in Canada, and are more suited to cliff areas.
I checked my National Audubon Society Pocket Guide - North American Birds of Prey, and none of the large hawks have all white underneath and grey on top, and only the unmentionable species is closest to that description.
Can Kurdt sell me one of his GOOBF cards?
On the other hand, the red-tailed is the most common hawk, is about the right size, and has many variations. But all white underneath and grey on top is a stretch.
Now the Gyrfalcon has a white variation, but they tend to be further north in Canada, and are more suited to cliff areas.
I checked my National Audubon Society Pocket Guide - North American Birds of Prey, and none of the large hawks have all white underneath and grey on top, and only the unmentionable species is closest to that description.
Can Kurdt sell me one of his GOOBF cards?