I was walking by the library last fall, and a peregrine falcon had snagged a pigeon. it was devouring it on the library roof. Really cool for me, as I'm something of a peregrine falcon fan
Anyway, I thought it was great, and I mentioned as much to a friend-who-is-also-a-vegetarian, and she wasn't so sure. Guess I've never given thought to the necessity of death/taking life, but apparently some people are very much concerned about it.