Free pictures in several categories.

Animal Wallpaper Originals provides free original Pets, Wildlife, Domesticated & Holiday Animals desktop wallpapers for Mac & PC. Animal wallpaper categories include Cats, Dogs, Bovine/Cows, Equine/Horses, Goats, Working Animals, Big Cats, Birds, Deer, Frogs & Toads, Insects, Marine/Fish, Pachyderms/Elephants, Primates/Monkeys, Holiday, Fantasy Animal Wallpapers and lots more.