. Key to North American birds [microform] : 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. Birds; Ornithology; Oiseaux; Ornithologie. ]]H ,, VIUKOS. — OKN. Ht'.l. Hix }{niii'r;i iiii'l iiciirly si'vcntv n'iir to lie elie of Nollll AllielicM. Illoll^li several Hpeeii'H oeelir ill llie \V I'st Ilhlies mill Celllial Alllerica ; one irelilis ami speeiL'S, /lUlrlCH iinlmriii, is fxeliisively NN'est lii'liaii; tiie rest—('iii-hirliis^ tliilniJiilns, \'in(il(, and Xrnrhliif —
. Key to North American birds [microform] : 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. Birds; Ornithology; Oiseaux; Ornithologie. ]]H ,, VIUKOS. — OKN. Ht'.l. Hix }{niii'r;i iiii'l iiciirly si'vcntv n'iir to lie elie of Nollll AllielicM. Illoll^li several Hpeeii'H oeelir ill llie \V I'st Ilhlies mill Celllial Alllerica ; one irelilis ami speeiL'S, /lUlrlCH iinlmriii, is fxeliisively NN'est lii'liaii; tiie rest—('iii-hirliis^ tliilniJiilns, \'in(il(, and Xrnrhliif — are. with one exception, South ami Ci'iitral Anierican. In rnrlher illns- ti'alii>n III' the chaiacters of the ;:i'oiip, I oiler Monie remarks ninler the liead of the (inly ^.'ciiiis with which we liaxc to ilo in the present eonneetion. 6;J. GcnuH VIREO Vioillot. The iiiiinerons species of this i^enns have lieeii diviileil into several ^roiipn, hilt III) violence will lie done liy eoiisideiiicu' tlieiii all as I'inn — in {'act, it is dillienlt, to do otherwise. l''or even tiie seemingly siilistantial division into two jieiierii, ae- cordiii;; as there is an evident spniioiis lirsl primary or apparently none, sepiiriiteH species, like ijilnis and jililldilil/i/iiriis, hardly otherwise speeilically ilistin};nishalile ; while another division into two j;eiieiii, aecordiii;j: to shape of the wiii^s and leiic;tli of the spiirimis first primary or its aliscnce, is sniijeet to some iiiieerlaiiity of detor- iiiinatiini, ami iiiiites species, like ulirKrins nut} llurifrnns, most dissimilar in other rcspi'cts. Tlie fact is, that aliiiost every siiiele species of 17/'i'« has its own peenliar form, ill shape of liill, proporlioiis of primaries, etc., and these details cannot well lie coiisidereil as of niole than s|)ecilic value. 'I'liesc slijihl dilferences are perfectly tanpilile ami Mii|irisiiiL;iy constant, and render the ileter- miiialioii of the species eomparalively eas
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbirds, bookyear1872
