The New Encyclopaedia Britannica: A - K.Encyclopaedia Britannica, 1997 |
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Page 3
... feathers . However , ducks and geese , some rails and loons ( divers ) , and auks shed all of their flight feathers at one time , immediately after the nesting season . Not until these feathers are replaced are the birds able to fly ...
... feathers . However , ducks and geese , some rails and loons ( divers ) , and auks shed all of their flight feathers at one time , immediately after the nesting season . Not until these feathers are replaced are the birds able to fly ...
Page 5
A - K. downy feather mixed among contour feathers Movable upper mandible. Wing shape filoplume mixed among contour feathers well as in the air . When birds that " fly " underwater lose the ability to fly in air , the wings become highly ...
A - K. downy feather mixed among contour feathers Movable upper mandible. Wing shape filoplume mixed among contour feathers well as in the air . When birds that " fly " underwater lose the ability to fly in air , the wings become highly ...
Page 25
... feathers of the wing are shed simultane- ously , but in the other groups molt is gradual . The primary and secondary feathers typically are replaced by means of two or three molt waves that start several feathers apart and move outward ...
... feathers of the wing are shed simultane- ously , but in the other groups molt is gradual . The primary and secondary feathers typically are replaced by means of two or three molt waves that start several feathers apart and move outward ...
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19th century adult America anemia antibodies antigens Asia behaviour bill birds blood group bodhisattva body Bolivia bone Brazil Brazilian breeding broadcasting bryophytes Buddha Buddhist building called Caprimulgiformes centimetres central centre China clotting colonial colour countries cuckoos disease display early eggs electrons Eocene falconiforms Family feathers feeding feet female forest fossil frequency genera genus gruiform hemoglobin important incubation Indian insects islands known legs light Mahāyāna major male marrow metres molt monks nest normal North oilbird owls pair Pāli parrots passerines pattern pelecaniforms penguins percent perch period Piciformes pigeons plasma platelets plumage political population produced programs protein radio red cells region river São Paulo scanning sexes short signal South species sporangium structure Suborder surface tail television Theravada tion tissue toes tradition trees tropical tube usually Vajrayāna varies wings woodpeckers World young