You have a popular feeder.
Cooper's Hawk has a longer more round tail and a larger head.
Nice pic's.
Cooper's and Sharp-shinned are very difficult to sort out but I suspect that you have two Cooper's. I think the tails look fairly rounded as in Cooper's. Among other items pointed out in my bird book it says that "Cooper's often perches on fence posts or poles as well as tree branches while Sharp-shinned almost always perches on tree branches."
It looks like a Sharp Shinned to me just from the solid coloring in it's face but I'm not sure if you have them out West. Anyway you got great clear shots of them.
Well, I don't know - but they sure are cool!
Careful, though. They look hungry.
I think the first is a Cooper's based on your size calculations and also because the tail is clearly rounded. (That is always the first mark I look for.) Also note that the eyes give the appearance of being placed forward in the face - this is supposed to be one of the impressionistic signs of a Cooper's.
I find the second one a bit harder to identify. Size seems to indicate sharp-shinned.
Nice photos.
I'll go out on a limb here and say I think hawk #2 is a sharp-shinned. It has a really different look around it's eyes than hawk #1. It's softer somehow. No less fierce though. They are brazen perching right on the feeder. Is Bonsai safe? Really nice shots bums. I (heart) you!
I don't know, but they are amazing!
Well done!
Dave-- So do you think these may be two Sharp-shinned, a large female and the smaller male?
OW-- We were pretty convinced the smaller one was a Sharp-shinned. It was so small compared to the others we've seen in the yard and on the feeder. These two birds are very hard to tell apart, that's for sure. I was glad to get these photos, though, so we could take a better look.
Whisker-- We do have Sharp-shinned here in Washington, and both hawks are notorious for finding backyard birdfeeders.
Thingfish-- I'm sure they're hungry! We've got a backyard full of their favorite food.
John-- Interesting info about the forward-facing eyes. I was pretty convinced that the smaller bird was a Sharp-shinned, but was less sure about the larger one. Most of the literature says to watch for how they fly, and their wing beats. That's way over my head (literally and figuratively)!
jsk-- Oh yes, Bonsai is safe, especially since he is still hanging out in the house afraid of some other creature we haven't seen.
Sonia-- Thanks so much. We were pretty pleased with the photographs. It helped immensely that both birds just sat there for quite some time.
Well, that settles that. In my very inexpert opinion, looking at my bird book, I'd say No. 1 is a Cooper's and No. 2 is a Sharp-skinned. Peace.
That's right RD. I believe you have a male and a female. The female being the larger one as it always is for birds of prey.
I'm going to have to agree with Dave on this one. I can't see enough of the tail or nape , but my guess is you have a male and female Sharp-shinned.
Sharpies tend to perch and watch more than Coopers- Coopers are quite aggressive predators, especially around feeders, etc.. and will often chase smaller birds into trees/shrubs. Sharpies are much more patient predators and will often perch right on the top of our bird feeders. (The red eyes signify these are both adult birds.)
great photos RD 
SPECTACULAR!
The hawks look great, as always
I bet your yard goes bird quiet when these guys/gals show up. Really nice shots.
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