Gorcrows

Gorcrow, "gore crow", is an old English name for carrion crow. It is used by Tolkien in a Hobbit verse about the Mewlips, published as a part of The Adventures of Tom Bombadil. The Mewlips are fearsome creatures of remote marshes, and on the same damp marshes live these foul crows, mentioned only in passing:

"And gloomily the gorcrows stand
Croaking in their sleep."