Meeressäuger

Whales, Dolphins, and Other Marine Mammals of the World (Princeton Field Guides)

The complete guide to Antarctic wildlife

Handbook of Western Palearctic Birds

Whales, Dolphins, and Other Marine Mammals of the World

Sylvia Warblers

Birder's Guide to European and Middle Eastern Birds

Antarctic Wildlife

Handbook of Western Palearctic Birds, Volume 1 : Passerines

Sylvia warblers