Borne On The Wing: Avian Influenza Risk In U.S. Wild Songbirds Mapped

Scientists have discovered that 22 species of passerines--songbirds and perching birds--in the contiguous U.S. are carriers of low-pathogenicity avian influenza.

The prevalence of influenza in waterfowl has long been known. But the researchers' analysis of samples taken from 225 passerine species in 41 U.S. states indicates that the number of songbird species with low-pathogenicity avian influenza is greater than the number in eight other avian orders, including waterfowl.

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Image credit: U.S. National Park Service