I'm guessing the carcasses were deposited by Tornado...
QUOTE
For hundreds of years there have been reports of strange objects (fish, turtles, etc.) falling from the sky, presumably after being lofted by some distant tornado. Now researchers at the University of Oklahoma’s School of Meteorology are interested in receiving such reports as part of a study of severe storm dynamics. And while falling fish are of interest, reports of items that can be traced back to their source of origin (canceled checks, pieces of mail, etc.) are of most value. Recent research has collected a long list of items which have fallen from the skies, apparently after being lofted by a tornado. Some of the more interesting things that were gone with the wind: plate glass, land title papers, a music box, trousers, coats, a wedding gown, a tie rack, dead ducks, a cow...and an airplane wing. A jar of pickles was swept away and landed.....25 miles downwind. And it was unbroken.
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How far can tornadoes carry debris?