The hawk, in other words, appears to have learned to interpret a traffic signal and take advantage of it, in its quest to hunt. Which is, with all due respect, more impressive than how most humans use a pedestrian crosswalk.
That sort of urban buffet seems to have been a major incentive for this particular Cooper’s hawk, Dinets, who published his observations of the bird in Frontiers in Ethology, told me. One of the (human) families in the neighborhood regularly dined outdoors in the evening, leaving a scattering of food scraps on their front lawn that would routinely attract a group of small birds the next morning. But the hawk needed perfect conditions to successfully dive-bomb that flock: enough cover, from a long-enough line of cars, to attack unseen. That scenario would play out only on weekday mornings, when both foot and car traffic were heavy enough that the crosswalk signal would stall lines of cars down the streets.
Over several months, Dinets noticed that the bird seemed to have figured out this complex system of ifs, ands, or buts. The hawk appeared only when the necessary degree of congestion was possible. And only after the pedestrian-crossing signal was activated would it ready itself for an attack—perching in a nearby tree to wait for the backlog of cars that it knew would soon manifest. Then, only after the queue stretched long enough to totally conceal its path, the bird would head toward its prey.
A zoologist observed a Cooper’s hawk using a crosswalk signal as a cue to ambush its prey.
A great story. Love it.