Raptors at Bryan Hall?

No, not exactly, but a pair of Cooper’s Hawks have been nesting in Dunn Woods since I first noticed them in 2008. Their nests are easy to distinguish from that of the numerous squirrels in the woods, always very high, and made of sticks and stems rather than leaves. The latest one is in a large tree close to Bryan Hall, they have been observed by workers on the third floor, just a hundred feet or so from the east facing windows.

As you may now, Bloomington has had a winter influx of crows over the last few years, and they roost at night in large groups numbering in the hundreds. At dusk you can see them flying together to one of their favorite spots on the west side, at the courthouse, in Elm Heights and in Dunn Woods. Here they are at my house on a cold February evening.

So the city, and IU, have found a way to keep the crows away. Downtown on the square, at Bryan Hall, and at Morrison Hall, as evening comes on, squawks and calls from a variety of raptors are broadcast to the night skies. This seems to push the crows to another roosting spot (like Elm Heights), and thus keep the crow dropping off the parking meters on the square, and footpaths in Dunn Woods. But the giant murders of crows stop roosting in town as soon as the weather gets warm, apparently they have better things to do and places to be.

But IU keeps the recordings going through March and April (and maybe longer). This seems like overkill, and may well have kept the Cooper’s Hawks from nesting. At the very least it is keeping the mammals and smaller birds in on edge through sunset and dusk. I am wondering who to ask about having the recordings turned off now that the weather is warm and there is no need for the (disconcerting and annoying) recordings?

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