Owls of the Eastern Ice: A Quest to Find and Save the World's Largest Owl

Slaght, Jonathan C.

Barn Owls: Evolution and Ecology. With Grass Owls, Masked Owls and Sooty Owls

Roulin, Alexandre

Nightwatchmen of Bush and Plain : Australian Owls and Owl-like Birds

Fleay, David

The Eagle Owl. Poyser Monographs

Penteriani, Vincenzo and Maria del Mar Delgado

The Owls of Southern Africa

Kemp, Alan C.

Owls

Angell, Tony

Lady Grayl: Owl With a Mission

Nero, Robert W.

Owls of the World

Duncan, James

The Great Gray Owl: Phantom of the Northern Forest

NERO, Robert W.

Neotropical Owls: Diversity and Conservation

Enriquez, Paula (Editor)

Undiscovered Owls: A Sound Approach Guide [Damaged]

Robb, Magnuss

Hawks, Owls and Wildlife

Craighead, John J.; Frank C. Craighead