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OWL (O. Eng. Ule, Swed. Uggla, Ger. E...

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Originally appearing in Volume V20, Page 398 of the 1911 Encyclopedia Britannica.
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OWL (O. Eng. Ule, Swed. Uggla, Ger. Eule—all allied to See also:Lat. Ulula, and evidently of imitative origin)  , the See also:general See also:English name for every nocturnal See also:bird of See also:prey, of which See also:group nearly two See also:hundred See also:species have been recognized . The owls See also:form a very natural assemblage, and one about the limits of which no doubt has for a See also:long while existed . They were formerly placed with the Accipitres or diurnal birds of prey, but are now known to belong to a different group of birds, and are placed as a suborder Striges of Coraciiform birds, their nearest See also:allies being the goatsuckers . The subdivision of the group has always been a fruitful See also:matter of discussion, owing to the See also:great resemblance obtaining among all its members, and the existence of safe characters for its See also:division has only lately been at all generally recognized . By the older naturalists, it is true, owls were divided, as was first done by F . See also:Willughby, into two sections—one in which all the species exhibit tufts of feathers on the See also:head, the so-called " ears " or horns, " and the second in which the head is not tufted . The artificial and therefore untrustworthy nature of this distinction was shown by Isidore See also:Geoffroy St-Hilaire (See also:Ann . Sc . Naturelles, xxi . 194-203) in 183o . The later See also:work of C . L .

Nitzch on pterylography and of A . Milne-See also:

Edwards on See also:osteology has led to a division of the See also:family Strigidae into the sub-families Striginae, in which the unnotched sternum has its broad See also:keel joined to the furcula, and Buboninae, in which the sternum is notched posteriorly, the clavicles do not always meet to form a furcula, nor meet the sternum . The Striginae contain the screech- or See also:barn-owls (Strix) and the partly intermediate Heliodilus of See also:Madagascar, whilst all the other genera are now placed with the Buboninae . Among owls are found birds which vary in length from 5 in . —as Glaucidium cobanense, which is therefore much smaller than a skylark—to more than 2 ft., a See also:size that is attained by many species . Their plumage, none of the feathers of which possesses an aftershaft, is of the softest See also:kind, rendering their See also:flight almost noiseless . But one of the most characteristic features of this whole group is the See also:ruff, consisting of several rows of small and much curved feathers with stiff shafts—originating from a See also:fold of the skin, which begins on each See also:side of the See also:base of the See also:beak, runs above the eyes, and passing downwards See also:round and behind the ears turns forward, and ends at the See also:chin—and serving to support the longer feathers of the " disk " or space immediately around the eyes, which extend over it . A considerable number of species of owls, belonging to various genera, and natives of countries most widely separated, are remarkable for exhibiting two phases of coloration—one in which the prevalent browns have a more or less rusty-red tinge, and the other in which they incline to See also:grey . Another characteristic of owls is the reversible See also:property of their See also:outer toes, which are when perching quite backwards . Many forms have the legs and toes thickly clothed to the very claws; others have the toes, and even the tarsi, See also:bare, or only sparsely beset by bristles . Among the bare-legged owls those of the See also:Indian Ketupa are conspicuous, and this feature is usually correlated with their See also:fish-catching habits; but certainly other owls that are not known to catch fish See also:present much the same See also:character . Among the multitude of owls there is only See also:room here to make further mention of a few of the more interesting .

First must be noticed the tawny See also:

owl—the Strix stridula of See also:Linnaeus, the type, as has been above said, of the whole group, and especially of the Strigine See also:section as here understood . This is the Syrnium aluco of some authors, the chat-huant of the See also:French, the species whose tremulous hooting " to-whit, to-who," has been celebrated by See also:Shakespeare, and, as well as the plaintive 'See also:call, " keewick," of the See also:young after leaving the See also:nest, will be See also:familiar sounds to many readers, for the bird is very generally distributed throughout most parts of See also:Europe, extending its range through See also:Asia See also:Minor to See also:Palestine, and also to See also:Barbary—but not belonging to the Ethiopian Region or to the eastern See also:half of the Palaearctic . It Flo. t.—Strix occidentalis._ is the largest of the species indigenous to See also:Britain, and is strictly a woodland bird, only occasionally choosing any other See also:place for its nest than a hollow See also:tree . Its See also:food consists almost entirely of small mammals, chiefly rodents; but, though on this See also:account most deserving of See also:protection from all classes, it is subject to the stupid persecution of the ignorant, and is rapidly declining in See also:numbers ? Its nearest allies in See also:North See also:America are the S. nebulosa, with some kindred forms, one of which, the S. occidentalis of See also:California and See also:Arizona, is figured above; but none of them seem to have the " merry See also:note " that is uttered by the See also:European species . See also:Common to the most northerly See also:forest-tracts of both continents (for, though a slight difference of coloration is observable between See also:American examples and those from the Old See also:World, it is impossible to consider it specific) is the much larger S. cinerea or S. lapponica, whose See also:iron-grey plumage, delicately mottled with dark See also:brown, and the concentric circles of its facial disks make it one of the most remarkable of the group . Then may be noticed the genus Bubo—containing several species 1 All owls have the See also:habit of casting up the indigestible parts of the food swallowed in the form of pellets, which may often be found in abundance under the owl-roost, and reveal without any manner of doubt what the prey of the birds has been . The result in nearly every See also:case shows the enormous service they render to See also:man in destroying rats and mice . Details of many observations to this effect are recorded in the Bericht fiber See also:die XIV . Versammlung der Deulschen Ornithologen-Gesellschaft (pp . 30-34).which from their size are usually known as See also:eagle-owls . Here the Nearctic and Palaearctic forms are sufficiently distinct—the latter, B. ignavus,2 the due or See also:grand due of the French, ranging over the whole of Europe and Asia north of the Himalayas, while the former, B. virginianus, extends over the whole of North America .

Phoenix-squares

A contrast to the generally sombre See also:

colour of these birds is shown by the snowy owl, Nyctea scandiaca, a circumpolar species, and the only one of its genus, which disdains the shelter of forests and braves the most rigorous See also:arctic See also:climate, though compelled to migrate southward in See also:winter when no sustenance is See also:left for it . Its large size and See also:white plumage, more or less mottled with See also:black, distinguish this from every other owl . Then may be mentioned the birds commonly known in English as " horned " owls—the hibous of the French, belonging to the genus Asio . One, A. otus (the Otus vulgaris of some authors), inhabits See also:woods, and, distinguished by its long tufts, usually See also:borne erected, would seem to be common to both America and Europe—though experts profess their ability to distinguish between examples from each See also:country . Another species, A. accipitrinus (the Otus brachyotus of many authors), has much shorter tufts on its head, and they are frequently carried depressed so as to See also:escape observation . This is the " See also:woodcock-owl " of English sportsmen, for, though a See also:good many are bred in Great Britain, the See also:majority arrive in autumn from Scandinavia, just about the See also:time that the See also:immigration of woodcocks occurs . This species frequents heaths, See also:moors and the open country generally, to the exclusion of woods, and has an enormous See also:geographical range, including not only all Europe, North See also:Africa and See also:northern Asia, but the whole of America—reaching also to the Falklands, the Galapagos and the See also:Sandwich Islands—for the See also:attempt to See also:separate specifically examples from those localities only shows that they possess more or less well-defined See also:local races . Commonly placed near Asio, but whether really akin to it cannot be stated, is the genus Scops, of which nearly See also:forty species, coming from different parts of the world, have been described; but this number should probably be reduced by one half . The type of the genus S. giu, the See also:petit duc of the French, is a well-known bird in the See also:south of Europe, about as big as a See also:thrush, with very delicately pencilled plumage, occasionally visiting Britain, emigrating in autumn across the Mediterranean, and ranging very far to the eastward . Farther southward, both in Asia and Africa, it is represented by other species of very similar size, and in the eastern See also:part of North America by S. asio, of which there is a tolerably distinct western form, S. kennicotti, besides several local races . S. asio is one of the owls that especially exhibits the dimorphism of coloration above mentioned, and it was long before the true See also:state of the case was understood . At first the two forms were thought to be distinct, and then for some time the belief obtained that the ruddy birds were the young of the greyer form which was called S. naevia; but now the " red owl " and the " mottled owl " of the older American ornithologists are known to be one species .3 One of the most remarkable of American owls is Speotyto cunicularia, the bird that in the northern part of the See also:continent inhabits the burrows of the See also:prairie See also:dog, and in the See also:southern those of the biscacha, where the latter occurs—making holes for itself, says See also:Darwin, where that is not the case—rattlesnakes being often also See also:joint tenants of the same abodes .

The See also:

odd association of these animals, interesting as it is, cannot here be more than noticed, for a few words must be said, ere we leave the owls of this section, on the species which has associations of a very different kind—the bird of See also:Pallas Athene, the See also:emblem of the See also:city to which See also:science and See also:art were so welcome . There can be no doubt, from the many representations on coins and sculptures, as to their subject being the Carine noctua of See also:modern ornithologists, but those who know the See also:grotesque actions and ludicrous expression of this veritable buffoon of birds can never 2 This species bears confinement very well, and propagates freely therein . To it belong the historic owls of See also:Arundel See also:Castle . 3 See the remarks of Mr Ridgway in the work before quoted (B . N . America, iii . 9, ro), where also response is made to the observations of Mr See also:Allen in the Harvard Bulletin (ii . 338, 339) . 398 cease to wonder at its having been seriously selected as the See also:symbol of learning, and can hardly divest themselves of a suspicion that the choice must have been made in the spirit of See also:sarcasm . This little owl (for that is its only name—though it is not even the smallest that appears in See also:England), the cheveche of the French, is spread throughout the greater part of Europe, but it is not a native of Britain . It has a congener in C. brama, a bird well known to all residents in See also:India . Finally, we have owls of the second section, those allied to the screech-owl, Strix flammea, the Effraiei of the French .

This, with its discor- dant scream, its snoring, and its hissing, is far too well known to need description, for it is one of the most widely- spread of birds, 11~~ and is the owl that has the greatest geo- graphical l i ti range, inhabiting almost i~~~I` every country in ti the world—See also:

Sweden and Nor-way, America north of See also:lat . 450, and New See also:Zealand being the See also:principal exceptions . It varies, however, not inconsiderably, both in size and intensity of colour, and several ornithologists have tried to found on these See also:variations more than half-a-dozen distinct species . Some, if not most of them, seem, however, hardly worthy to be considered geographical races, for their See also:differences do not always depend on locality . R . See also:Bowdler See also:Sharpe, with much labour and in great detail, has given his reasons (See also:Cat . B . Brit . Museum, ii . 291-309; and Ornith . See also:Miscellany, i . 269-298; ii .

1-21) for acknowledging four" subspecies " of S. jlammea, as well as five other species . Of these last, S. tenebricosa is See also:

peculiar to See also:Australia, while S. novae-hollandiae inhabits also New See also:Guinea, and has a " subspecies," S. castanops, found only in See also:Tasmania; a third, S. candida, has a wide range from See also:Fiji and northern Australia through the Philippines and See also:Formosa to See also:China, Burmah and India; a See also:fourth, S. capensis, is peculiar to South Africa; while S. thomensis is said to be confined to the See also:African See also:island of St See also:Thomas . To these may perhaps have to be added a species from New Britain, described by See also:Count Salvadori as Strix aurantia, but it may possibly prove on further investigation not to be a strigine owl at all . (A .

End of Article: OWL (O. Eng. Ule, Swed. Uggla, Ger. Eule—all allied to Lat. Ulula, and evidently of imitative origin)
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