The National Geographic Magazine, Volumes 98-99National Geographic Society, 1951 - Geography Indexes kept up to date with supplements. |
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Page 240
... nest robbing and will usually eat the eggs or young in any unguarded nest . Gulls even raid nests of their own species . The Heermann's gulls of Raza , however , seem to have a code of ethics which prohibits them from eating eggs or ...
... nest robbing and will usually eat the eggs or young in any unguarded nest . Gulls even raid nests of their own species . The Heermann's gulls of Raza , however , seem to have a code of ethics which prohibits them from eating eggs or ...
Page 798
Eared Grebe's Nest Is a Soggy Houseboat Moored to Rushes in North Dakota Marsh Grebes build floating nests of decayed vegetation and usually bind them to aquatic plants . When disturbed , they cover eggs with strands from the nest and ...
Eared Grebe's Nest Is a Soggy Houseboat Moored to Rushes in North Dakota Marsh Grebes build floating nests of decayed vegetation and usually bind them to aquatic plants . When disturbed , they cover eggs with strands from the nest and ...
Page 811
... nest , which must be completed in time for the first egg . It takes about six days for an egg to be formed and laid after the first yellow yolk is deposited about the ovum . Most birds spend about six days building their nests , so from ...
... nest , which must be completed in time for the first egg . It takes about six days for an egg to be formed and laid after the first yellow yolk is deposited about the ovum . Most birds spend about six days building their nests , so from ...
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