. Key to North American birds. Containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland and Lower California, with which are incorporated General ornithology: an outline of the structure and classification of birds; and Field ornithology, a manual of collecting, preparing, and preserving birds . ooted tarsi and ten primaries, the 1stspurious. But such expression requires qualification,for the TurdidfB do not show this combination with-out exception, and birds of some other
. Key to North American birds. Containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland and Lower California, with which are incorporated General ornithology: an outline of the structure and classification of birds; and Field ornithology, a manual of collecting, preparing, and preserving birds . ooted tarsi and ten primaries, the 1stspurious. But such expression requires qualification,for the TurdidfB do not show this combination with-out exception, and birds of some other families dopossess it. Though it be as natural as any otherOscine family of equal extent and variety, and equallyclose relationships with other groups, it is in thenature of the case insusceptible of perfect definitionin concise terms. The North American representa-tives, however, may readily be circumscribed in a man-ner enabling the student to assure himself of the familyto which they belong. Besides the true Thrushes, the „, , ^ -r. ^ . family as at present constituted includes the Mocking Fig. 113. — Thrushes: European Redwing • ^ i • j y i ^ ri (Turdus iliacus) and Fieldfare {T. pilaris). Thrushes, Dippers, Blue-birds, Kinglets and Gmat- From Dixon. catchers, with stray representatives of certain Old World forms, the Chats and Sylvines, sometimes held to represent separate families (Saxico-. TUEDIBjE — TUBBING : THRUSHES. •241 lidce aud Sylviidce), between which and Turdidce, however, no line whatever can be vast assemblage of Old World Warblers are in fact much more thoroughly Thrush-likethan are our Mimince, for example; and the Turdidce would be much more homogeneous andeasy to characterize if the Mock-birds and Gnat-catchers, with scutellate tarsi and not strict^spurious 1st primary, were to be excluded. The relationships of the Mimince with the really so close, that they have often been associated witli the Troglodytidce, to which t
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1896
