At 25, Backyard Bird Count shows power of citizen science

In this photo supplied by Macaulay Library/Cornell Lab of Ornithology, a chickadee sits on a branch. Chickadees are fond of black oil sunflower seeds; loading up a clean, carefully-positioned backyard feeder will attract many of them. (Brad Imhoff/Macaulay Library/Cornell Lab of Ornithology via AP)

It’s a given that when the Great Backyard Bird Count begins Friday, Steve and Janet Kistler of Hart County, Kentucky, will be joining in. They’ve done so every year since the now-global tradition began 25 years ago.

For Moira Dalibor, a middle-school math teacher a couple hours away in Lexington, this will be the first count. She’s leading a group of students and parents to an arboretum for an exercise in data-gathering.

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