I spotted one of my eastern bluebirds dead in the pond yesterday, a very large bullfrog had half of it stuffed in it's mouth and had drowned it. I few hours later found the bluebird floating near the shore, grrrr.. I'm guessing this was one of the mated pairs we have using in the nesting boxes near our house.
When I lived at home my dad was really excited to see a Bob White quail on the property. We also lived on the edge of their range as some of our winters really do them in.
Anyway, he was driving the pick up truck down to the barn and the quail smacked against his windshield and was killed instantly.
He was very disappointed to say the least!