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SCREAMER

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Originally appearing in Volume V24, Page 477 of the 1911 Encyclopedia Britannica.
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SCREAMER , a See also:

bird inhabiting See also:Guiana and the See also:Amazon valley, so called in 1781 by T. See also:Pennant (Gen. Birds, p. 37) " from the violent See also:noise it makes "—the Palamedea cornuta of See also:Linnaeus. First made known in 1648 by G. de L. Marcgrav under the name of " Anhima," it was more fully described and better figured by See also:Buffon under that of Kamichi, still applied to it by See also:French writers. Of about the See also:size of a See also:turkey, it is remarkable for the curious " See also:horn " or slender caruncle, more than three inches See also:long, it bears on its See also:crown, the two See also:sharp spurs with which each wing is armed, and its elongated toes. Its plumage is See also:plain in See also:colour, being of an almost See also:uniform greyish See also:black above, the space See also:round the eyes and a See also:ring round the See also:neck being variegated with See also:white, and a patch of See also:pale rufous appearing above the carpal See also:joint, while the See also:lower parts of the See also:body are white. Closely related to this bird is another first described by Linnaeus as a See also:species of Parra (see JACANA), to which See also:group it certainly does not belong, but separated therefrom by Illiger to See also:form the genus Chauna, and now known as C. chavaria, very generally in See also:English as the " Crested Screamer," a name which was first bestowed on the See also:Seriema (q.v.). This bird inhabits the lagoons and swamps of See also:Paraguay and See also:Southern See also:Brazil, where it is called " Chaja. " or " Chaka," and is smaller than the preceding, wanting its " horn," but having its See also:head furnished with a dependent See also:crest of feathers; while the plumage is See also:grey. Its See also:nest is a See also:light construction of dry rushes, having its See also:foundation in the See also:water, and contains as many as six eggs, which are white tinged with See also:buff.

The See also:

young are covered with down of a yellowish-See also:brown colour. A most singular See also:habit possessed by this bird is that of rising in the See also:air and soaring there in circles at an immense See also:altitude, uttering at intervals the very loud cry of which its See also:local name is an See also:imitation. From a dozen to a See also:score may be seen at once so occupying themselves. The young are often taken from the nest and reared by the See also:people to attend upon and defend their poultry, a See also:duty which is faithfully' and, owing to the spurs with which the chaka's wings are armed, successfully discharged. Another very curious See also:property of this bird, which was observed by Jacquin, who brought it to the See also:notice of Linnaeus,' is its emphysematous See also:condition—there being a layer of air-cells between the skin and the muscles, so that on any See also:part of the body being pressed a crackling See also:sound is heard. In Central See also:America occurs another species, C. derbiana, chiefly distinguished by the darker colour of its plumage. For this a distinct genus, Ischyrornis, was proposed, but apparently without See also:necessity, by A. B. See also:Reichenbach (Syst. Avium. p. xxi.). The taxonomic position of the Palamedeidae, for all will allow to the screamers the See also:rank of a See also:family at least, has been much debated. Their anserine relations were pointed out by W.

K. See also:

Parker in the Zoological Proceedings for 1863 (pp. 511-518, and in the same See also:work for 1867 T. H. See also:Huxley placed the family among his Chenomorphae; but this view was contravened in 1876 by A. H. Garrod, who said, " The screamers must have sprung from the See also:primary avian stock as an See also:independent offshoot 1 Hence J. Latham's name for this species is " Faithful Jacana "—he supposing it to belong to the genus in which Linnaeus placed it. Tacta manu cutis, sub pennis etiam lanosa, crepat ubique fortiter " (Ssst. Nat. ed. 12, i. p. 260).at much the same See also:time as did most of the other important families." P.

L. Sclater in 188o placed them In a distinct See also:

order, Palamedeae, which he, however, placed next to the true Anseres, and they are now generally regarded as forming a sub-order of anseriform birds.

End of Article: SCREAMER

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