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Mysterious illness killing birds may be in N.C.
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Mysterious disease killing trees in Northeast Ohio
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Mysterious illness plagues Pennsylvania songbirds, Local News
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Mysterious Illness Affecting Birds in Maryland and Beyond - What's Up? Media
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The Bird with the Cricket-Like Song
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Ruffed grouse population more resilient than expected, genetic study finds
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We Still Don't Know What's Killing the Birds
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Blue Jays, Grackles, Other Birds Dying From Mysterious Ailment : NPR
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Purple Martins: The Bird That Relies on Human-Built Nests - Cool Green Science