Throughout the summer and autumn, juvenile Cooper’s Hawk(s) have been observed hunting on Eastern Point. We see them zooming low and stealthily down roadways and soaring high amongst the treetops. There is no way of knowing if they are one and the same although one bird in particular appears to have developed a keen interest in the flock of Dark-eyed Juncos currently foraging in the neighborhood. Nearly every evening at dusk he hungrily swoops in, but never seems to capture one.
Well-camouflaged Dark-eyed Juncos, also known as Snowbirds
The Snowbirds have a neat set of tricks. They all scatter to the surrounding trees and shrubs. The slate gray and brown Dark-eyed Juncos are well camouflaged but that is not their only secret to survival. Rather than singing their typical lovely bird song, from their hiding places, they all begin making an odd chirping-clicking sound. From every bush and shrub within the nearby vicinity, you can hear the clicks. I think the clicking is meant to confuse the Cooper’s Hawk!
He’ll first dive into a bush hunting a Junco, come up unsuccessfully, then swoop over to a nearby tree, perched and well hidden in the branches while on the lookout for dinner. The Snowbirds click non-stop until the Cooper’s departs. After the hunter flies away, they all come out of their hiding places, some from branches mere feet from where the Cooper’s was perched. After a short time, they resume their lovely varied birdsong. I recorded audio of the Junco’s clicking and hope to find out more about this fascinating behavior.
Cooper’s Hawks are a conservation success story. You can read more about the reason why in a post form several years ago: SPLENDID COOPER’S HAWK – A CONSERVATION SUCCESS STORY GIVES HOPE. Note the difference in the plumage in the two stories. The Cooper’s Hawk in that post is an adult. The Cooper’s chasing the Snowbirds is a juvenile. Both are about crow-sized, with the typical flat topped head.