I have what seems like 100 crows living in the trees around my house and when the babies are in the trees waiting to be fed the noise is enough to drive me crazy! Yesterday, however, they did a great job alerting me and the girls to potential danger. I heard the crows going nuts, sqawking, screaming and carrying on. I could hear other crows coming fom different directions to join the angry mob. I went to investigate and looked up to see 2 hawks flying overhead. The girls were huddled under my ladder and I put them back into their run until danger had passed. I live on a lake, so most of the predators usually head there for fish. So, for the crows a handful of peanuts and a thank you.