To be, or not to be a Harlan's

[Eagle Owl]

Anyone know how to tell the other sub-species apart,Calurus,Borealis and Umbrinus?

There is not really a specific look that separates them apart as there is a great color variation among RTs. Hence the reason I am in the taxonomic group that does not recognize them as subspecies. But those 3 RTs are defined by where they breed.

Buteo jamaicensis borealis --- eastern red-tailed hawk
Buteo jamaicensis calurus --- western red-tailed hawk
Buteo jamaicensis umbrinus --- Florida red-tailed hawk