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More than 100 pages use this file. The following list shows the first 100 pages that use this file only. A full list is available.. Aachen Lacquer Shield Owl pigeon; Altenburg Trumpeter
When attempting to identify a flying raptor Debus & Davies [3] recommend concentrating on the bird's silhouette (including shape of wings and proportions), flight style and vocalisations, rather than on details of colouration.
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A Brief History Pointing to Innate Behavior. Friedrich Goethe was the first to perform experiments using silhouettes (1937, 1940). He found that naive Capercaillie exhibited a greater fear response to a silhouette of a hawk than to a circle, a triangle, or a generalized bird silhouette, but that this varied with both species, and prior experience. [9]
Swifts are small birds which spend the majority of their lives flying. These birds have very short legs and never settle voluntarily on the ground, perching instead only on vertical surfaces. Many swifts have long swept-back wings which resemble a crescent or boomerang. Glossy swiftlet, Collocalia esculenta; Satin swiftlet, Collocalia uropygialis
The lyrebirds are large passerine birds, amongst the largest in the order. They are ground living birds with strong legs and feet and short rounded wings. They are poor fliers and rarely fly except for periods of downhill gliding. [7] The superb lyrebird is the larger of the two species. Lyrebirds measure 31 to 39 inches in length, including ...
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The birds follow a somewhat convoluted course in order to take advantage of prevailing winds. [15] The average Arctic tern lives about 30 years and will, based on the above research, travel some 2.4 million km (1.5 million mi) during its lifetime, the equivalent of a roundtrip from Earth to the Moon more than three times.