Part 20

The members of this division were separated by Cuvier into two sections--the COLUMBÆ, or Pigeons, and the GALLINÆ, properly so called. More recently, however, these sections have been considered as forming two distinct orders, distinguished by the names of the PIGEONS (_Gyratores_) and the SCRAPERS (_Rasores_), or TRUE GALLINACEOUS BIRDS.

PIGEONS.

The place which the Pigeons ought to occupy in the zoological system has been a very fertile subject of dispute. Linnæus classed them with the _Passeres;_ Buffon, Pennant, and Latham arrange them as an order by themselves; while Cuvier and others place them in the category of Gallinaceous Birds. The settlement of this question is, indeed, a matter of considerable difficulty, as the habits of the entire race are in many respects very peculiar. Like the Passerine Birds, they associate in pairs during the nuptial season, work together in the construction of their nest, and materially assist in the incubation of their eggs and the care of their progeny, which latter, blind and helpless when they are first hatched, are fed in the nest that forms their cradle, and which they never quit until fully fledged; indeed, for some time afterwards they are unable to supply their own wants, and depend entirely upon the assistance of their parents. The features in which they differ from the Passerine race are, however, equally well marked; these consist in their manner of drinking and of administering food to their young family, in the singularity of their caresses, in the nature of their plumage, and in their vocal capabilities. They neither sing nor utter any cry; their only voice in the adult state consists of a full, rolling sound, generally designated by the term "cooing." Other dissimilarities separate them from the Gallinaceous races, with which they have little in common, either in their instincts, their manner of life, or their mode of pairing. The _Gallinæ_ are almost all of them polygamists, and the females, by laying numerous eggs, produce a covey at a single brood. Moreover, in temperate climates, this happens but once in the year. The Pigeons, on the contrary, are all of them strictly monogamous, and the female lays but two eggs for each sitting, although she has several broods. In the Gallinaceous tribes the male renders no assistance to the female, either in the construction of the nest or in the care of their progeny. The chickens are born with their eyesight perfect, and as soon as they escape from the egg-shell are able to run about, and procure for themselves their own food. The principal distinctive character of the _Columbæ_ is furnished by the structure of the bill. The upper mandible consists of a horny apical portion, which is often of considerable length and strength, but its base is formed by a convex cartilaginous plate, in the anterior portion of which the nostrils are situated. The skin covering the cartilaginous portion is of a soft texture, very different from the rest of the bill. It is sometimes smooth, and clothed with a sort of scurf, but in other cases it is warty, or even developed into a fleshy wattle. This is especially the case in some domesticated varieties of the Pigeon. The _Columbæ_ are provided with short tarsi and moderately long toes, all scutellated. The toes are four in number, three in front and one behind. The anterior toes are not united by a membrane at the base. The hinder toe is placed on the same plane with those in front, and the whole sole of the foot is formed of soft papillated pads, which are usually a good deal wider than the scutellated upper portion of the toes. The wings, which are generally long and pointed, contain ten primary quills, and the tail usually consists of twelve feathers, although in some cases there are sixteen. Another important character distinguishing these birds, as compared with the _Gallinæ_, is that their feathers are destitute of the plumules, or accessory plumes, which are greatly developed in Gallinaceous Birds. The form of the wing in Pigeons is sufficient to indicate that they are capable of powerful flight, and many of them are remarkable for the speed with which they traverse the air, especially when engaged in their migrations. Most of them are arboreal, and nestle in the holes of trees; others frequent rocks, but all perch with great facility; nevertheless, they generally seek their food upon the ground, and walk or run without difficulty. They are also remarkable for their mode of drinking, in which they differ from all other birds. The general practice of birds in drinking is to take up a small portion of water in the bill, and then, by raising the head, to allow it to run down into the throat. The Pigeons, on the contrary, dip their bills into the water, and hold them there till they have quenched their thirst. These birds are inhabitants of the warmer and temperate regions of the earth, but they are found in most abundance in hot climates, where, also, their plumage attains a brilliancy of which that of our native species gives us but an imperfect idea.

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The FRUIT PIGEONS (_Trerones_) are recognisable by their compact body, short, thick beak, powerful, broad-soled, but short feet, moderate-sized wings, and short tail; the latter is composed of fourteen feathers, and is either slightly cuneiform or straight at its extremity. The plumage, in which green predominates, is always brilliant.

The members of this group inhabit the whole of India, the Malayan Peninsula, Australia, and Africa, and are usually seen in parties of variable number, perched upon fruit-trees. Their movements much resemble those of the Parrots, and their voice, unlike that of most of their congeners, is loud and sweet. Such species of Fruit Pigeons as inhabit India (and probably Africa) place their very loosely-constructed nest at the summit of a lofty tree, and lay two white eggs.

THE PARROT PIGEON.

The PARROT PIGEON (_Phalacroteron Abyssinica_), a beautiful species of the above group, is powerfully built, with long wings and a short tail; its beak, which is short and strong, has the base bare and the upper mandible hooked at its tip; the short tarsus is almost entirely covered with feathers, and the broad-soled foot furnished with small toes; the wing, in which the second quill is the longest, is pointed, and the tail straight at its extremity. The plumage of this beautiful bird is pale olive-green on the mantle and light yellow on the under side; the head, throat, and breast are greyish green, the shoulders of a rich deep red, the wing-covers of a blackish hue, broadly edged with pale yellow; the quills black, edged with a lighter shade; the dark grey tail is black upon the under portion, from the root to the centre, and from that point to the tip of a silver-grey; the purple-red iris is surrounded by a narrow blue ring; a bare patch which encircles the eye is blueish red, the cere of a dirty coral-red; the white beak is shaded with blue, and tipped with pale red; the foot is deep orange-yellow. The length of this species is twelve and its breadth twenty-one inches; the wing measures six inches and three-quarters, and the tail four inches and a quarter. The female is somewhat smaller in size, but closely resembles her mate in the coloration of the plumage.

This Pigeon has been met with in Great Namaqua Land, Western Africa, and Abyssinia. Temminck informs us that it frequents the settlements of the traders, and is constantly to be seen perching perfectly motionless upon the trees during the heat of the day; at the approach of the rainy season, he tells us, it consorts with others of its species in large flocks, and wanders forth to more southern portions of the continent: our own experience would, however, lead us to condemn the latter statement as erroneous, and, indeed, all recent observations on this point prove that this bird does not migrate. Lofty mimosa-trees, surrounded by bushes of Christ's-thorn, and interlaced with the streaming tendrils of the cissus, are the favourite resorts of such of these birds as inhabit regions where those trees are abundant, while such as occupy the mountain-valleys seek shelter amid the luxuriant foliage of the tamarind-tree, or upon the well-covered branches of the lofty sycamore. Occasionally this species is seen living in pairs, but most usually in small parties of from eight to twenty birds. Even when thus associated, it is easy to distinguish the different couples, as the males constantly perch and fly close to their mates, towards whom they exhibit the utmost tenderness, endeavouring to excite their attention and admiration by agitating their wings, and caressing and tending them with all the devotion exhibited by the Parrot for its mate. The flight of these Pigeons is rapid, and accompanied by a harsh, shrill sound, produced by the violent motion of the wings as they cleave the air. The voice is very unpleasing. Such of these birds as we observed did not utter the cooing note common to many of their congeners. The stomachs of those we shot contained berries of various kinds. Le Vaillant informs us that the Parrot Pigeon deposits her eggs in a bed of moss and dry leaves within a hollow tree, but this statement we believe to be erroneous. Owing to the extreme timidity of these birds, it is exceedingly difficult to obtain specimens.

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The DOVES (_Columbæ_) are distinguishable from the above group by the peculiar form of their delicate, moderate-sized beak, which is covered with a cere at its base, is slightly vaulted, and has a hard, sharp tip. The comparatively high, slender foot is well adapted for walking firmly on the ground; the tail, composed of twelve feathers, is either rounded or straight at its extremity, and the plumage not remarkable for its brilliancy. The members of this group occupy all parts of the globe, Europe being particularly rich in species.

THE RING-DOVE, WOOD PIGEON, OR CUSHAT.

The RING-DOVE, WOOD PIGEON, or CUSHAT (_Palumbus torquatus_), has a large and strongly-built body, comparatively long tail, and short feet. The plumage of the adult bird is of a deep blue on the head, nape, and throat; the upper part of the back and upper wing-covers are dark greyish blue, and the lower portion of the back and rump light blue; the breast is reddish grey, the centre of the under side light greyish blue, and the lower belly white. The lower part of the throat is decorated on each side with a glossy white spot, and gleams with metallic lustre; the quills are slate-grey and the tail-feathers slate-black, marked with an irregular stripe of lighter shade. The female is recognisable from her mate by the inferiority of her size, and the young birds by their comparatively pale plumage. In all, the eye is pale sulphur-yellow, the beak light yellow, with a red base, and the foot blueish red. The length of the body is sixteen inches and a half, and the breadth twenty-eight inches and a half; the wing measures nine and the tail six inches and a half.

The Ring-dove, so called on account of the white feathers that partially encircle the throat, is the largest of all the wild Pigeons met with in Europe, the warm and temperate portions of which it frequents in large numbers, only visiting such northern countries as Sweden and Norway during the warm seasons. It is particularly fond of fir plantations, and in these its tender, cooing note may be heard during the entire spring and summer. In England these Pigeons resort to woods, coppices, and enclosed ground; and in winter assemble and roost in large parties on the summits of lofty trees, the ash-tree affording them a very favourite gathering-place. Their food consists of young leaves and seeds of various kinds, according to the season of the year. In spring and summer they subsist principally on the tender leaves of growing plants, and often commit great ravages in fields of beans and peas. Spring-sown corn is also attacked by them, both in the grain and the blade; and as soon as young turnips have put forth their second leaves, they, too, become objects of devastation. As the season advances they visit the corn-fields, especially those in the neighbourhood of their native woods, and seek for oily seeds of all kinds with great eagerness. At the approach of autumn they assemble in small flocks, and resort to oak and beech trees, where acorns and beech-mast, swallowed whole, afford them an abundant and nourishing diet. In winter these small flocks unite, and form larger ones, so large, indeed, that it would appear probable that their numbers are considerably augmented by arrivals from colder climates. Both parents assist in making their strange and carelessly constructed abode, which scarcely deserves to be called a nest, being nothing more than a mere platform of twigs, so loosely put together that the brood is distinctly visible through the interstices. The fork of a branch is usually selected as a resting place for the nest. The eggs, two in number, are long, rough-shelled, and of a glossy white; both ends are of equal breadth. The work of incubation is shared by both parents; the father, in such broods as we have observed, taking his place upon the nest from about nine or ten in the morning till three or four in the afternoon. When first hatched the young are fed with pulp from the crops of the adult birds, and, when older with softened seeds. When strong enough to go forth into the world, each parent takes care of a fledgling, and conducts it into the fields to seek for food on its own account. Towards man these birds exhibit much timidity, and if disturbed whilst brooding often desert their eggs.

The Ring-dove is easily tamed, but very rarely breeds in captivity; and even when reared from the nest, if set at liberty, it at once seeks its native woods, and never voluntarily returns.

In all ages of the world this Dove has been regarded with especial favour, and, as a sacred symbol, is in some countries regarded with particular reverence.

The Himalayan Cushat differs from the European by the neck-patch being clayey buff instead of white, and much contracted in size, also in the less extent of the white border to the primaries. Mr. Blyth also notices that whilst in European birds the green gloss prevails above the neck-patch, and amethystine below, the reverse is the case in the Asiatic race. This Wood Pigeon has only been found in the North-western Himalayas, near Simla, and in the Alpine Punjaub. It visits the salt range and the plains of the Punjaub during winter.

THE STOCK DOVE.

The STOCK DOVE (_Columba œnas_) is of a deep blue upon the head, throat, upper wings, lower part of back, and rump; the upper portion of the back is deep greyish blue, the region of the crop rich deep red; the rest of the under side pale blue. The quills and ends of the tail-feathers are slate-blue, the wing is decorated with a dark band, and the neck enlivened by the metallic lustre common to the race of Pigeons. The eye is deep brown, the beak pale yellow, with dark flesh-pink base, powdered with white, and the foot pale red. The young resemble the parent birds, but are duller in their colours. The length of this species is from twelve inches to twelve and a half, and its breadth from twenty-five to twenty-six inches; the wing measures eight inches and a half and the tail five inches.

Many authors have regarded this as the same species as the Rock Dove, or as having but trifling differences. Yarrell, however, considers them to be perfectly distinct, both as to habits, voice, plumage, and the localities which they frequent. "The Stock Dove," says this accurate author, "was called _œnas_[A] on account of the vinous claret-colour of the plumage of the neck; and Stock Dove, not because it was by some considered to be the origin of our domestic stock, but because it builds in the stocks of trees, particularly such as have been headed down, and have become in consequence rugged and bushy at the top." In more open parts of the country, holes in the ground are selected as breeding-places, especially the burrows of rabbits. When the warreners find the young in a burrow, they fix sticks at the mouth of the hole in such a manner as to prevent the escape of the young, but so as to allow the old birds to feed them. Bishop Stanley refers to this bird's habit of building in holes as illustrative of a passage in Scripture. He says; "In the Eastern countries and the Holy Land, the Wild Pigeons almost invariably prefer such situations to trees, thus confirming the words of the prophet, who speaks of the 'dove that maketh her nest in the sides of the hole's mouth' (Jer. xlviii. 28)."

When the eggs are laid in this manner in deserted burrows, they are either placed on the bare sand or upon a few dried roots, about a yard within the entrance. The Stock Dove also nestles under furze bushes, or in the holes of decayed trees. The eggs are two in number, oval and white, and are laid about the end of March or beginning of April. The food of the Stock Dove is similar to that of the last-mentioned species.

The _Columba œnas_ has not been found in Scotland. On the continent of Europe it is abundant, visiting the central and northern parts during the summer, and it has been seen in Northern Africa. It is also said to be met with in the Deccan. The harsh and somewhat grunting note of this species is usually uttered while the bird is perching, and is accompanied by considerable inflation of the throat. When in flight its movements are very rapid and noisy, the wings producing a rushing sound, which gradually becomes shriller and clearer, but altogether subsides when the gently hovering motion commences that precedes alighting. So strong is the love of the Stock Dove for its favourite retreat, that even if repeatedly alarmed it returns immediately to its place. The period of incubation commences early in spring, and, if not disturbed, the female produces three broods in the season, the first eggs being deposited by the beginning of April. During the whole time his mate is thus busily engaged, the male bird testifies the greatest devotion, keeping close to her, and constantly uttering his cooing note. Many are the quarrels that ensue between the various couples at this period, for, as each requires an unused hole in some tree wherein to deposit a brood, the demand is usually greater than the supply, and as these localities are also much resorted to by such formidable antagonists as Starlings, Woodpeckers, and Jackdaws, the domestic career of a pair of Stock Doves is by no means one of uninterrupted peace and harmony. This constant change of domicile is rendered necessary by the rapid accumulation of the castings from the young, with which the inmates become so soiled that some time elapses after they have left the nest before the feathers are thoroughly purified; fortunately for the building birds, by the following season, insects of various kinds and the busy Woodpecker have cleared away the refuse from the holes, and made them fit for occupation. We are told that the affection of this species for its brood is so strong that it is almost impossible to force the parent birds away, and that a female Stock Dove will remain to be shot rather than desert her eggs.

THE ROCK DOVE.

The ROCK DOVE (_Columba livia_)--see Coloured Plate XXVII.--is of a pale greyish hue on the mantle and bright blue on the under side; the head is light slate-blue, the throat deep slate-colour, glistening above with bright blueish green, and on its lower portion with a purple gloss; the rump is white. Two black lines pass across the deep grey wings; the tail-feathers are dark bright blue, tipped with black; those at the exterior are white on the outer web. The eye is sulphur-yellow, the beak black, with a light blue base, and the foot deep blueish red. The sexes are alike, and the young somewhat deeper in their colours than the adult birds. This species is thirteen inches long and twenty-three broad; the wing measures eight inches and one-sixth and the tail four inches and one-third.

The Rock Dove in its natural state inhabits rocky sea-coasts, flying only sufficiently inland to procure food. It is spread over a very wide range of country, being met with as far north as the Faroe Islands, and as far southward as Africa. In Great Britain it is found both on the southern coasts of England and in the east and west of Scotland. In the Orkneys it breeds in the crevices of the rocks, the nests being at such a depth that they are quite out of reach. During the day the Doves associate in flocks and search for food, which consists principally of grain and seeds.

The Rock Dove breeds twice in the season, each brood consisting of two young, generally a male and a female. The eggs are white and of a short oval shape, rather pointed at one end. From this species our Dove-cote Pigeons are derived, and they, like their original progenitors, seldom roost or settle on trees.

The nest of the Rock Dove is a mere heap of straw, dry grass, and twigs, with a slight hollow in its centre for the reception of the eggs, which have a glossy, pure white shell. The female alone builds, but is supplied with materials by her devoted mate, who remains constantly near her both day and night. The blind and unusually helpless young are hatched about sixteen or eighteen days after the eggs are laid, and leave the shell within from twenty-four to thirty-six hours of each other. As with their congeners, the nestlings are at first nourished with pulp from the crops of their parents, then with partially digested seeds, and when fledged, with hard seeds, with the addition of tiny pebbles and bits of clay, to assist the still weak gizzard in the work of trituration. When about a month old the young are strong enough to quit the nest in company with their parents, who, however, soon leave them to their own devices, and at once commence their preparations for a second brood.

"The Blue Pigeon, or Rock Dove of India" says Jerdon, "differs from that of Europe only in having an ash-coloured instead of pure white rump. It is one of the most common and abundant birds, congregating throughout the country in large flocks, and breeding wherever they can find suitable spots. They are most partial to large buildings, such as churches, pagodas, mosques, tombs, and the like, frequently entering verandahs of inhabited houses and building in the cornices. Hollows in walls of cities or towns are favourite places, and in some parts of the country they prefer holes in wells. In default of such spots they will breed in crevices and cavities of rocks, caverns, and sea-side cliffs, and are particularly partial to rocky waterfalls. The celebrated falls of Gaissoppa are tenanted by thousands of Blue Pigeons. These Pigeons are held in respect by most Hindoos, and almost venerated by some, insomuch that if a pair build in the house of a native he considers it a favourable omen."

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The CUCKOO PIGEONS (_Macropygiæ_) constitute a group distinguishable by the slender formation of their bodies, their small heads, long tails, and short wings and feet. These birds are all eminently social in their habits, and frequently keep together in large flocks. All subsist principally upon fruit and seeds, and, in order to obtain these, constantly occupy woods and forests, from whence they occasionally venture forth to seek for food in well-planted gardens and orchards.

THE PASSENGER PIGEON, OR CAROLINA TURTLE-DOVE.