Ruffled feathers

While getting ready to leave for work this morning, I looked up to see this beautiful Red-shouldered Hawk (Buteo lineatus) in our yard:

 

At times it looked quite ruffled:

 

Eventually we realized it was because most of the smaller birds in the neighborhood weren't so happy about the hawk being nearby.  Many of them dove at the hawk, scolded it, or just kept flitting from branch to branch, close to the hawk, but not too close...

 

[Northern Mockingbird (Mimus polyglottos) in the lower left corner.]