Big birds are having fewer chicks as climate changes ...Middle East

In a time of crisis, evolution favors the little guy. Smaller birds are more successful in raising chicks in a hotter world than large birds, according to a study in the Proceedings of the National Academy of Sciences (PNAS) published Monday. "It’s not good to be big in a warming world," Lucyna Halupka, a biologist at Poland's University of Wroclaw told The Hill. The global study surveyed 100 species, identifying changes over the past half-century in how many fledglings a typical bird pair got out of the nest. Compared to small birds like warblers, bigger birds like hawks and storks are raising fewer surviving fledglings, the PNAS study found. Big birds — over about 2 pound

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