. 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. ff- II: 210 KAIXOMDyi';, DirHNAI, ItlllDS OK I'liKV. OI'-N. lol, 'I'lif jiciicra ^;/-iiiul ^Irci'j'i/ir iwv luircct illii>ti;i)i( f>r tliis group; the several (itlicr jiciicni uMKilly iiilciili'd arc not vci_v iliUcrciit. 'I'lid'e jippoav to lie a1)out scvuiilv-livo sixcics, of llul^t [laits of tlic world. ;•. Lastly, the true /(ili-a
. 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. ff- II: 210 KAIXOMDyi';, DirHNAI, ItlllDS OK I'liKV. OI'-N. lol, 'I'lif jiciicra ^;/-iiiul ^Irci'j'i/ir iwv luircct illii>ti;i)i( f>r tliis group; the several (itlicr jiciicni uMKilly iiilciili'd arc not vci_v iliUcrciit. 'I'lid'e jippoav to lie a1)out scvuiilv-livo sixcics, of llul^t [laits of tlic world. ;•. Lastly, the true /( arc jiroiiiiiiciilly (li>tiiii:iii>lic(l liy tlio prosoiico of a todtli licliiml a iiotcli of llic upper niandililc. in llic forc^jo'uiij;' the toniia l)cin<f sinijjly Idlicd or festooned, or merely arched. The falcons arc birds of incdinui and small size (one of them is not larixcr than sonic spairows). hut extremely coini)aet and iio\V( I'fnl organization, and hold rnthlcss disposition ; they [iri'y hy sudden and violent , and cxhiliit the raptoi'ial nature in its perfection. The \vings are stronj:', lonu; and jiointcd, the lij) lormcil hy the lM and .'id (| supiiorted nearly to the end liy the 1st and 1th ; the tail is generally short and still'. The ty|iical and [irincipal genus is /'(//co, of which there ari'. liowcvci', sevi'ral sulidi\ isions corres- ponding to minor moililicalions. The Australian /crdriih'ii. Uw l-"ast Indian Ii-nix, anil the iJrazilian II(irji( it is hoped that he will detect the imperfection of the arrangement, and that his studies will soon convince him of the impossibility of expressing natural relationships in any linear series. ^\'itll this hint, the inviting problem is left open to stinudate investigation. 151. Genus CIRCUS Lacopedo. MamJi Harrir:)-. Adult ^ pale hliiisli-asii, nearly iiiivarioil, Avhitcning helow and on upper lail coverts; (piills blackish townrtl tlio end; lG-18 ; Aving 14-1');
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbirds, bookyear1872
