Definition of "harfang"

At La Madelaine, also, it was the leavings of the meals that brought about the accumulation of bird-bones; but, together with numerous Tetraones and Cocks, we find the remains of several Harfangs. […] It seems […] that the men of the Lherm Cave ate this Owl; […]

1875, Édouard Amand Isidore Hippolyte Lartet, Henry Christy, Thomas Rupert Jones, Reliquiæ Aquitanicæ, page 247