If you hear a murder of crows cawing wildly, it’s worth looking around to see what they’re warning you of. (Today it was a large hawk.)
How Do Crows Warn Each Other About Dangerous Predators - Earth of Birds
On quiet mornings in my neighborhood, I often see crows perched on telephone wires, scanning the ground. Suddenly, their calm breaks: sharp cries fill the
earthofbirds.com