This one really creeped me out. On the National Geographic Channel, I watched a documentary about these Scottish deer who are supplementing their diet by killing and eating small birds. They had actual videos of this creepy change in behavior.
Weird. What the article didn't make clear (or maybe I missed it) is what caused the need for a supplemental diet in the first place? If this is a change in behaviour then there must be a corresponding change in environment. Climate change or something?
I couldn't find the video either... probably just as well!
Wildlife film director Jacqueline Farmer said, "This behavior has never been filmed before. Hopefully the footage will form part of a documentary we're making about the way animals use natural medicines."