National Geographic : 1951 Feb
',NatI I i(eogiI el) C ZIO t[y 4 Eaglelike Ospreys Build Huge Nests of Sticks and Weeds on Dominating Sites The wild-eyed, fierce-looking hawks are almost exclu sively fish-eaters, catching their prey in lightning dives. They defend their nests with utmost courage. Nearly full-grown ospreys (right) have tested their wings and are about ready to leave their parents (left). Kodachrnlms by Lewis \\iayne Walker S"Hey, Get Out of There!" Yelled Author. A Robber Gull Steals a Tern Egg While making tests to learn how birds recognize their own eggs, Mr. Walker saw what a peril nest-robbing Heermann's gulls are to a rookery. Before he could get out of his blind, the gull at right had eaten every egg not guarded by the aptly named elegant terns.