WHEW - I feel for the person posting the next 4th critter - just trying to find something we haven't done yet (or could do again!) is a challenge at this point...
Here's my non-alphabetized summary of what we've used to date:
Least
Eastern
American
Common
Golden
Blue
Western
White
Black
Northern
Greater
South(ern)
Yellow
Red
Ruddy
Great
European
Eurasian
Buff(y)
California
Cassin’s
Brown
-bellied
-winged
-crested
Masked
-billed
-breasted
-crowned
-eyed
Wilson’s
-headed
Snow(y)
-billed (again)
Wood
-colored
-tailed
Long
-eared
Here are some unused suggestions gleaned from the last 4 pages as well... Crimson, Dark, Double, Dusky, Gray, Green, Hooded, Little, Large, Small, Short, Large, Small, Vented, etc.
So I'll let this photo do double duty for
-eared
And start the next "Four of a Kind" with
short
Short-
eared Owl.