I noticed some very interesting behavior in my chickens today. I was outside on the south side of the house watching my birds for a brief moment before going back inside to warm up. The birds and I were up close to the house and the roof overhang was directly over our heads blocking the view directly above the house. Suddenly some Blue Jays began their loud call, "Jay! Jay!" My Hamburg roo then sounded an alarm. All my chickens went under the porch and one of my hens who was up on the porch crouched beneath the grill. I looked up but didn't see anything overhead. I looked down again at the hen crouching under the grill, confused. I looked back up into the sky above us and just then a Cooper's hawk flew over the house into view. How did my chickens know that the Blue Jay was sounding an alarm for a hawk? I've read that chickens have over 30 vocalizations. Some of those are alarms for different kinds of threats: threat by air, threat on the ground, etc. Do Blue Jays also have different alarm calls? And if so, how did my Hamburg roo know that the Jays were warning that a hawk was coming? Chickens are a lot smarter than we give them credit for! My roo is an excellent group leader. This isn't the only outstanding characteristic he has, but it certainly is the most remarkable. My roo understands Blue Jays! Here he was at 22 weeks this fall. His tail is much more impressive now. What a good roo!