. Les oiseaux de Yellowstone et le Grand Teton National Parks . Les oiseaux ; les oiseaux. (Carouge à tête jaune Xanthocephalus xanthocephalus) Au printemps, les marais et étangs dans le Yellowstone et le Grand Teton re- son avec un medley de cris d'oiseaux. Foulques, canards, les canards plongeurs, des rails, des parulines masquées, les troglodytes, les merles noirs et tous inscrivez-vous au concours annuel pour des partenaires et territoire. L'un des oiseaux les plus frappantes inhabi- tants de ce marais est l'environnement le mâle carouge à tête jaune. La tête jaune, le cou et la poitrine, et la large bande blanche alaire con contraste fortement avec le noir de la bo

• Contributeur: The Book Worm / Alamy Banque D'Images
• ID de l’image: RDC0J2
• Taille du fichier: 7,1 MB (331,9 KB Téléchargement compressé)
• Autorisations: Modèle - non | Propriété - non
• Dimensions: 1991 x 1255 px | 33,7 x 21,3 cm | 13,3 x 8,4 inches | 150dpi

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. Birds of Yellowstone and Grand Teton National Parks . Birds; Birds. YELLOW-HEADED BLACKBIRD (Xanthocephalus xanthocephalus) In springtime, marshes and ponds in Yellowstone and Grand Teton re- sound with a medley of bird calls. Coots, ruddy ducks, diving ducks, rails, yellowthroats, marsh wrens, and blackbirds all join in the annual competition for mates and territory. One of the most striking bird inhabi- tants of this marshland environment is the male yellow-headed blackbird. The yellow head, neck, and chest, and the broad, white wing patch con- trast sharply with the black of the bird's body and tail. The male is most often seen perched in a conspicuous spot along the edge of a pond. From this location he utters a variety of harsh, unmusical notes and flits com- batively through the marsh defending his territory. The female is brownish with a wash of yellow on the breast and with a white throat and streaked lower breast. This species breeds in localized colonies throughout Yel- lowstone and Grand Teton.. Western Tanager Joe Van Wormer EVENING GROSBEAK (Hesperiphona vespertina) The evening grosbeak is a handsome bird with a richly colored plumage and a powerful beak. The male is yellow with black wings and tail, while the female is gray with black wings and tail. Both sexes have large white wing patches, and the female has a yellowish cast across her back and upper breast and white in her tail. During the breeding season evening grosbeaks feed primarily on conifer seeds and wild berries. When the breeding season has been completed evening grosbeaks congregate in areas where they can feed upon the ripening chokecherries. During the winter flocks of evening grosbeak descend to lower elevations to feed on the seeds of seed-bearing trees such as the box elder. It is at this time that the grosbeaks powerful beak comes into play. The powerful, overlapping mandibles are used for shearing seeds off the trees. Evening grosbeaks are fairly common permanent residents in bot

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