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Study finds even the common house sparrow is declining


Credit: Donald Metzner, courtesy Cornell Lab of Ornithology.
Ithaca, NY The European House Sparrow has a story to tell about survival in the modern world. In parts of its native range in Europe, House Sparrow numbers are down by nearly 60%. Their fate in the U.S. and Canada is less well known. A new study by Cornell Lab of Ornithology scientists aims to clarify the status of this non-native species, using 21 years of citizen science data from the Cornell Lab s Project FeederWatch. The results are published in the
Wilson Journal of Ornithology.
We wanted to find out where and how much House Sparrows might be declining here, explains lead author Liam Berigan, who did this work while at the Cornell Lab and who is now a Ph.D. student at the University of Maine. We also explored whether the declines would match up with an increase in hawk populations, as is true in European studies. Surprisingly, they didn t. ....

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