I know the pictures aren't so good but I thought the story was worth telling. Today I observed the Blue Jay eating dandelions in my backyard (do Blue Jays eat dandelions?!). A Red tailed Hawk (thank you to birdgirl for correcting my previous assumption that it was a sharp shinned) flew overhead and perched himself in my neighbor's tree. The Blue Jay immediately flew over to him and landed in the same tree shrieking very loudly. The hawk shrieked back. Meanwhile, the Robin and 2 finches that were in my yard - flew into a nearby bush and took cover. The Blue Jay was relentless and I kept wondering why the hawk didn't make a meal out of him. Too big? Too loud? After a few more minutes, the hawk took off. Then the Blue Jay flew back into my yard after a job well done. What a brave bird!
*P.S. If you look very carefully in the photo, you can see the Blue Jay to the right of the Hawk in the same tree.