. On the natural history and classification of birds . The head of the male yellow hammer is also decidedly EXTERNAL ANATOMY CRESTS. 33 it has again perched. During spring, indeed, whenin company with the other sex, the male always carriesit erect, although, when the bird is killed, it seems todisappear : many of the tyrant flycatchers of Americaexhibit, in the same manner, what may be called the ru-diments of a simply pointed crest, which is the first andmost simple of all those that are moveable : examplesof this form are very numerous, and exhibit a progres-sive development of the
. On the natural history and classification of birds . The head of the male yellow hammer is also decidedly EXTERNAL ANATOMY CRESTS. 33 it has again perched. During spring, indeed, whenin company with the other sex, the male always carriesit erect, although, when the bird is killed, it seems todisappear : many of the tyrant flycatchers of Americaexhibit, in the same manner, what may be called the ru-diments of a simply pointed crest, which is the first andmost simple of all those that are moveable : examplesof this form are very numerous, and exhibit a progres-sive development of the feathers, the longest of whichare either placed on the vertex or highest part ofthe crown of the head, or immediately behind, towardsthe nape. These feathers are always more or lesspointed, and rise gradually, one above the other, some-what in the shape of a cone. The two extremes ofthis structure may be seen, among our native birds, inthe common Muscicapa grisola and the lapwing of the most beautiful examples, in foreign or-nithology, of this sort of crest, developed to its utmostextent, will be fo
Size: 1916px × 1304px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookidonnaturalh, booksubjectbirds, bookyear1836
