I want to know the answer to the following question:
Which bird is an example of being both a predator and defender in mobbing attacks?
All the background I'm provided with is that "Crows are frequently mobbed by smaller songbirds as they prey on eggs and young from these birds' nests, but these same crows will cooperate with smaller birds to drive away hawks or larger mammalian predators.". Is that enough to answer the question?