This isn't so much a question as it is something really cool I witnessed today! We are in an urban area and can't have roosters for protection, but there are quite a few hawks. We lost a pullet to a hawk several months ago, but haven't had an attack from one since that day. I've been seeing more around, likely because of winter so I've been spending more time outside just to make sure my girls are protected. Well I've been noticing that they go and hide when there's a hawk around. Today I realized that every time a hawk shows up in the sky above, a crow caws or another wild bird, and the chickens hear it, and that's their cue to hide! I was amazed! Has anyone noticed this with their flock before?