. Directory per gli uccelli del Nord America orientale .. . costruiti e frangiati con terminazioni simili a capelli; le piume epecolari trattengono l'aria nei loro spazi intercalati durante l'immersione dell'uccello, mantenendo il piumaggio asciutto; quando emerge l'acqua che si aggrava alla superficie esterna viene gettata via dall'agitazione delle frange simili ai capelli, tanto come nel muschio-ratto e in altri mam-malls acquatici, fig. 2. Coda, piedi assenti, con chiodi lobati, appiattita, fig. 3. Camminare, o ev-en correre per una breve distanza, bymaking uno sforzo speciale, in volo in salita dal solo acqua. Volo, diretto, collo e testa, outstretch

• Collaboratore: Reading Room 2020 / Alamy Foto Stock
• ID dell’immagine: 2CNFYD9
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• Dimensioni: 1430 x 1748 px | 24,2 x 29,6 cm | 9,5 x 11,7 inches | 150dpi

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. Directory to the birds of Eastern North America .. . constructed, and fringed with hair-like terminations ; thesepeculiar feathers retain the air in their interspaces when thebird dives, thus keeping the plumage dry; when it emergesthe water which clings to the outer surface is thrown off bythe agitation of the hair-like fringes, much as in the musk-rat and other aquatic mam-mals, fig. 2. Tail, absent.Feet, with lobed toes* nails, flattened, fig. 3. Walk, or ev-en run for a short distance, bymaking a special effort, butrise in flight from the wateronly. Flight, direct, neckand head, outstretched ; feet, extended behind; wing-beatsrapid. Nests, of matted vege-tation, placed in reedy ponds, never on dry land, and arequite often floating; eggs, 6-8, greenish covered with a white ^ barbule ; B, tip of feather, enlarged. incrustation. Young, downy, streaked and mottled withwhitish and dark brown, slowly assuming the adult dress;active when hatched, swimming with their parents. Food^vegetable matter (often fresh water algae), insects, and small. 12 GREBES. fishes. Sexes, similar in color. To approach a grebe the ob-server should endeavor to see the bird before it perceiveshim. When the bird dives for food, walk toward it, standingperfectly still when it comes up; by continuing to do this, the margin of the water may be reached without alarmingthe bird. Grebes sink when they perceive anything of whichthey are suspicious, and dive when suddenly alarmed. Fig. 3.

Parole chiave associate all'immagine

• bookauthormayn
• bookcentury1900
• bookdecade1910
• booksubjectbirds