Eagles, Hawks, and Falcons of the World, Volume 1McGraw-Hill, 1968 - 945 pagina's |
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Pagina 33
... plumage . It usually differs from the adult plumage in that the feathers , especially those of the wings , back , and tail , tend to have pale tips or margins , of buff - brown or dull white . Furthermore , areas that are black in ...
... plumage . It usually differs from the adult plumage in that the feathers , especially those of the wings , back , and tail , tend to have pale tips or margins , of buff - brown or dull white . Furthermore , areas that are black in ...
Pagina 34
... adult plumage until the summer of its fifth year . Such prolonged immaturity is characteristic of the larger eagles and vultures . A few of the very largest species , such as condors , do not breed , apparently , until they are eight or ...
... adult plumage until the summer of its fifth year . Such prolonged immaturity is characteristic of the larger eagles and vultures . A few of the very largest species , such as condors , do not breed , apparently , until they are eight or ...
Pagina 350
... plumages between first im- mature and adult are not understood , but probable sub - adults are dark brown all over , lacking the barring on belly and thighs , with the bill still all dark . Birds in this plumage may be found mated with ...
... plumages between first im- mature and adult are not understood , but probable sub - adults are dark brown all over , lacking the barring on belly and thighs , with the bill still all dark . Birds in this plumage may be found mated with ...
Inhoudsopgave
INTRODUCTION | 9 |
INTRODUCTORY CHAPTERS | 15 |
CLASSIFICATION AND DISTRIBUTION | 17 |
Copyright | |
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Veelvoorkomende woorden en zinsdelen
Accipiter adult plumage Africa African Fish Eagle Aquila areas barred Bateleur bill birds of prey Black Kite blackish breast BREEDING HABITS breeding season brood buff Buteo Buzzard carcase carrion cere Circaetus Circus clutches colour Common Buzzard Condor crown dark brown darker display falcons feathers feed feet female FIELD CHARACTERS Fish Eagle fledging period flight forest genera Genus Golden Eagle Goshawk grey greyish ground Gyps Haliaeetus harriers hatched hawks head and neck hunting immature inner webs insects Kestrel kill Lammergeier larger leave the nest legs less mammals migration nape Osprey pair pale paler parents perch Peregrine Falcon Plate plumage primaries race range raptors Red-footed Falcon roost rufous Secretary Bird soaring sometimes Sparrow-hawk species streaked tarsus tipped tree tropical Turkey Vulture under-wing coverts upper-tail coverts usually Verreaux's Eagle White-backed Vulture whitish wing coverts wing loading wing quills winter World vultures yellow