African Penguin in captivity at Attica Zoological Park, Athens Greece, Spheniscus demersus

african penguin captivity attica zoological park athens greece spheniscus demersus wildlife conservation enclosure habitat zoo aviary birds flightless aquatic endangered species education research colony feeding swimming waddling blackandwhite plumage flipper tuxedo webbed beak marine seabird antarctic adaptation exhibits visitors tourists educational informative biology naturalistic