John T. Darby & Lloyd S. Davis 
Penguin Biology [PDF ebook] 

Penguin Biology is the first broad-based collection of biological and ecological studies of these unique birds to be published since 1975. Topics have since become broad ecological hypotheses, not species-specific descriptions, and new technology has taken observations into the oceanic depths. Penguin Biology shows new techniques and the applications mad of them in contemporary biological and evolutionary theory. Penguin Biology is an invaluable reference for ornithologists, animal behaviorists, animal physiologists, marine zoologists, marine ecologists, evolutionary biologists, and Antarctic researchers. – Major topics covered include Breeding, feeding, and foraging- Behavior and evolution- Energetics and physiology- New fossil material