Part 55

To those who know it slightly the cormorant is a big, sombre, ugly bird, heavy and awkward in his motions out of the water, and, when breeding, disgusting in his habits. He improves on a closer acquaintance. He may be easily tamed, and makes an intelligent, and sometimes very amusing, pet, and is capable of being trained to catch fish for his keeper. He is most frequently met with on the sea and seashore, but is an inhabitant of inland waters as well, and sometimes breeds beside them, making his nest on the ground or in a tree. He feeds exclusively on fishes and eels, which he captures by diving and pursuing them under water, sometimes for considerable distances. The bird is proverbial for its voracity. Its ‘swallow’ is probably the largest of any bird of its size--a fish fourteen inches long has been taken from its gullet. When swimming he presents a curious appearance: his body, as if too heavy for the element it floats in, sinks like a waterlogged boat, until the flat back is on a level with the surface. When alarmed, he sinks his body deeper and deeper at will, until the head and long neck alone appear, looking like the head and neck of a serpent swimming with body submerged. When resting on a rock after feeding, cormorants stand very erect and motionless, their long, hooked beaks much raised, and at such tunes they present a heavy, ungainly appearance. They are fond of opening their wings out to their greatest extent to dry their feathers, and remain for a long time in this attitude, looking like birds with spread wings carved out of black stone. The cormorant watches the water at times from a rock, and dives after its prey; but it more often swims, when fishing, with head and neck submerged. When taking wing it rises heavily and with great labour, but when once fairly launched the flight is powerful. Cormorants are gregarious and social birds at all seasons, and, like gulls and herons, they breed in communities. Very early in spring, or shortly after the winter solstice, the bird’s nuptial ornaments--a crest on the head and a white patch on the thigh--begin to appear; both crest and white mark disappear at the end of the breeding season. The same nesting-place is resorted to year after year, as in the case of most species that breed in communities. The summit of a crag not easily accessible, or a ledge of rock on a cliff fronting the sea, or a rocky island, are favourite sites. Here the birds, sometimes in hundreds, live together in the greatest harmony, building their nests close together, in some cases almost touching. The nest is pyramidal in form, built up from the rock to a height of from six or seven inches to a couple of feet, and is composed of sticks, coarse grass, and seaweed. Three to five eggs are laid, very small for the bird’s size, narrow and long in shape, of a pale greenish blue colour, overlaid with a thick coat of a chalky substance. This substance is quite soft when the egg is first laid; it is then white, but soon hardens, and becomes stained, in the always wet and filthy nest, to a dirty yellowish colour. The young birds are hatched blind, and have a naked, bluish black skin, but they soon grow a thick, sooty black down. They are at all stages strange and repulsive-looking creatures, and when handled or approached by a person they become sick with fear or anger, and roll and sprawl about on their nests, screaming harshly, and vomiting their half-digested food.

The young are fed with fish that has already been partially digested in the maw of the parent. It is not disgorged; the young bird thrusts his head and neck deep down into his parent’s gullet, and feeds as a horse does from his nose-bag.

The young are said not to assume the adult or breeding plumage until the third year.

Shag, or Green Cormorant.

Phalacrocorax graculus.

Bill black; base of the under mandible yellow, the black skin about the gape thickly studded with small yellow spots; iris emerald-green; crown, neck, upper and under parts dark green with purple and bronze reflections; wing and tail-feathers, legs and feet, black; a crest, curling forwards, grows on the forehead in early spring, and is lost by the end of May. Length, twenty-seven inches.

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The shag may be easily mistaken for the cormorant, which it closely resembles, but when near at hand is seen to differ in its smaller size and its prevailing green colour, which appears black at a distance; and, in the breeding season, by the absence of the white patch on the flank. In its habits it is more strictly marine than the cormorant, but resembles that bird in its manner of swimming and flight. It prefers bays and inlets to the open sea, and deep water near rocks to the shallow sea, where there is a low beach. In diving after fish it springs upwards almost out of the water, and goes down head first. Beneath the water it propels itself wholly by its feet; the auks, and some other diving birds, use their wings as fins to assist progression. After capturing a fish the shag brings it to the surface to swallow it, then swims on for a space, and dives again, and so on, and finally returns to the rock, where it proceeds to disgorge its prey, to devour it at leisure. The shag breeds on sea-cliffs, sometimes building on the ledges or in crevices, but caves, where they exist, are preferred. The eggs are three in number, in shape and colour like those of the cormorant, and the nests, which are placed close together, are also like those of that bird.

The shag is found in certain localities all round the coasts of Great Britain and Ireland, but is less numerous and more local than the cormorant.

Gannet.

Sula bassana.

Adult: head and neck buff-colour; all the rest of the plumage white, except the primaries, which are black. Young of the first year: upper parts blackish brown necked with white; under parts mottled with dusky ash and buff. The dark markings diminish until the sixth year, when the adult colouring is assumed. Length, thirty-four inches.

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One of the most notable seafowls inhabiting the British coasts is the gannet, or solan goose, a species which forms a connecting-link between the cormorants and the pelicans. The origin of its two common names is not precisely known, although it seems probable that gannet is derived from gans, the ancient British name for goose. The young birds from the Bass Rock, which are largely used as food in the neighbouring counties, are called, I do not know why, ‘Parliamentary geese.’ The world will have it that the bird is a goose, although as little like a goose, except in size, as a guillemot is like a sheldrake. The scientific name, bassana (of the Bass Rock), had its origin in the belief that the rock at the entrance to the Firth of Forth was the gannet’s only breeding-place. There are several other colonies: one, now greatly diminished, on Lundy Island; another, also small, on the coast of Pembrokeshire; on the West Coast of Scotland there are four stations, and others exist on the Irish coast. None of these, however, can compare in importance with the Bass Rock, where it has been calculated that as many as ten thousand pairs congregate each year to breed.

The gannet is an exclusively marine bird, and an inhabitant throughout the year of the seas round the British Islands. Its flight is easy and powerful, and its appearance on the wing more pelican- than cormorant-like. It feeds entirely on fish, and follows the shoals of such species as swim near the surface--mackerel, herrings, pilchards, and sprats. When fishing it sails at a considerable height, and on catching sight of its prey rises to a greater height, and then, with wings nearly closed, drops straight down, with great force, into the water. Its appearance when falling has been likened by one observer to ‘a brilliant piece of white marble.’

The gannets begin to assemble at the breeding-rock in March. Their nesting habits are similar to those of the cormorant, but only one egg is laid, which is, like the cormorant’s egg, pale blue in colour and thickly coated with a white, chalky material. Mr. Charles Dixon, in ‘Our Rarer Birds,’ thus describes a visit to the great gannet settlement on the east coast: ‘By far the best locality for studying the nesting economy of the gannet is the Bass, that wide-famed mass of basaltic rocks standing like a sentinel in the Firth of Forth.... Upon reaching the Bass a few gannets may be seen sailing dreamily about, but you have no idea of the immense numbers until you have climbed the rugged hill.... But when the summit of the cliff is reached the scene that bursts upon our gaze is one that well-nigh baffles all description. Thousands upon thousands of gannets fill the air, just like heavy snowflakes, and on every side their loud, harsh cries of “carra-carra-carra” echo and re-echo among the rocks. The gannets take very little notice of our approach, many birds allowing themselves to be actually pushed from their nests. Others utter harsh notes, and with flapping wings offer some show of resistance, only taking wing when absolutely compelled to do so, and disgorging one or two half-digested fish as they fall lightly over the cliffs into the air. On all sides facing the sea gannets may be seen. Some are standing on the short grass on the edge of the cliffs, fast asleep, with their heads buried under their dorsal plumage; others are preening their feathers; whilst many are quarrelling and fighting over standing-room on the rocks.’

Describing another great breeding-place of the gannet on the island of Borreay, about four miles from St. Kilda, he says: ‘The flat, sloping top of one of these stupendous ocean rocks, called by the natives “Stack-a-lie,” looks white as the driven snow, so thickly do the gannets cluster there, and the sides are just as densely populated wherever the cliff is rugged and broken. So vast is this colony of birds that it may be seen distinctly forty miles away, looking like some huge vessel under full sail heading to windward.’

Heron

Ardea cinerea.

Crest bluish black; upper parts slate-grey; forehead, cheeks, and neck white, the latter streaked with bluish grey and terminating in long white feathers; under parts greyish white; bill yellow. Length, thirty-six inches.

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The heron is sometimes spoken of as our largest wild bird. It is not meant that he is really larger than the golden eagle, or wild swan, or grey lag goose, but only that he is the biggest of the comparatively common birds. The heron has two very different aspects--when in repose, or standing, and when on the wing. On the ground, or, as we more often see him, standing knee-deep in the water, watching the surface, he presents a sorry appearance--a bird lean and ungraceful in figure, white and ghostly grey in colour, awkward in his motions when he moves. No sooner does he open his wings than this mean aspect vanishes, and he is transfigured. At first the flight appears heavy on account of the slow, measured beats of the broad, rounded vans; but as he rises higher, and soars away to a distance, it strikes the beholder as wonderfully free and powerful. The appearance of the bird is then majestic, and its flight more beautiful than that of any other large wading bird with which I am acquainted--ibis, wood-ibis, stork, flamingo, or spoonbill. When pursued by a falcon the heron is capable of rising vertically to a vast height, while the hawk rushes after in a zigzag course, striving to rise above his quarry so as to strike. This aërial contest of hawk and heron forms a very fascinating spectacle, and formerly, when falcons were trained for this sport, the heron was as much esteemed as the pheasant--which has been called the ‘sacred bird’--is at the present day. With the decline of falconry the heron ceased to be protected by law, and diminished greatly in numbers; but he is an historical bird, and there is a feeling, or sentiment, that has served to prevent his extermination. It is still considered a fine thing to have a heronry on a large estate; and so long as this feeling endures the bird will receive sufficient protection, although the existing heronries, when we come to count them, are not many.

The heron breeds in communities, and when the heronry is well-placed and safeguarded the birds return to it year after year. As a rule the nests are built on the tops of large trees in a sheltered part of the wood. The nest is a bulky, rudely built platform structure of sticks and weeds, lined with rushes, wool, and other soft materials. Three or four eggs are laid, very pale dull green in colour. The young are fed in the nest five or six weeks before they fly. Two broods are reared in the season.

The heronry is a most interesting place to visit when the young birds are nearly old enough to fly, and are most hungry and vociferous, and stand erect on the nests or neighbouring branches, looking very strange and tall and conspicuous on the tree-tops. The nests are of various sizes, and have a very disordered appearance, some of them looking like huge bundles of sticks and weed-stalks flung anyhow into the trees. At this period the parent birds are extremely active, and if the colony be a large one, they are seen arriving singly, or in twos and threes, at intervals of a few minutes throughout the day. Each time a great blue bird with well-filled gullet is seen sweeping downwards the young birds in all the nests are thrown into a great state of excitement, and greet the food-bearer with a storm of extraordinary sounds. The cries are powerful and harsh, but vary greatly, and resemble grunts and squeals and prolonged screams, mingled with chatterings and strange quacking or barking notes. When the parent bird has settled on its own nest, and fed its young, the sounds die away; but when several birds arrive in quick succession the vocal tempest rages continuously among the trees, for every young bird appears to regard any old bird on arrival as its own parent bringing food to satisfy its raging hunger.

The cry of the adult is powerful and harsh, and not unlike the harsh alarm-cry of the peacock.

Common Bittern.

Botaurus stellaris.

Crown and nape black; general colour buff, irregularly barred above and streaked below with black; feathers of the neck long, and forming a ruff; bill greenish yellow; legs and feet green. Length, thirty inches.