The Heron nests in colonies on high trees, the nest being built of sticks, lined with small twigs, moss, and wool. Five eggs of a uniform greenish blue form the clutch, and the young, which are extremely helpless when first hatched, are carefully fed by their parents on predigested food. The flight of this species appears slow and lumbering. The legs are carried stretched out behind and the head and neck closely folded in to the body. When disturbed or alarmed they utter a harsh “frank, frank.” Although usually nesting inland, they may often be found by the sea-shore in autumn and winter, especially during hard weather when their inland haunts are frozen over.
The adult is bluish grey on the upper parts; the head and neck are white with the exception of the crest, which is bluish black, as well as a row of dark longitudinal markings on either side of the neck. Under parts greyish white. Shoulders bluish black. The young resemble their parents but are browner and lack the long filamentous plumes on the back and base of the neck. The adult plumage is assumed by degrees, not reaching its full beauty till in the fourth or fifth year. Length 34 in.; wing 19 in.
THE PURPLE HERON
Ardea purpurea, Linnæus
The Purple Heron inhabits marshes in South and Central Europe, building a nest low down in the reeds, its nearest nesting place to us being in Holland. A good many examples, mostly immature, have occurred along our east coasts. On the back the adult is dark slate grey with rufous and buff dorsal plumes. Neck reddish, with dark elongated stripe down either side. Under parts rich maroon red. Immature birds are rusty red on the neck and upper parts, brownish on the under parts. Length 33 in.; wing 14·25 in.
THE GREAT WHITE HERON
Ardea alba, Linnæus
Very few examples of this large species have occurred in Great Britain. It breeds on the Danube and thence eastwards in South Russia. The plumage is pure white, legs and feet black. This species has become much scarcer owing to persecution for its plumes, known as “ospreys.” Length 33 in.; wing 17 in.
THE LITTLE EGRET
Ardea garzetta, Linnæus
This species breeds in Europe in the countries bordering the Mediterranean. It has only occurred in these islands on two or three occasions. Plumage pure white. Length 21 in,; wing 11·25 in.
THE BUFF-BACKED HERON
Ardea bubulcus, Audouin
A scarce species in Southern Europe, but breeding in the marismas of Spain. It is often found perched on the backs of cattle. Only known in England from one example shot in 1805. Plumage white, except the crown, nape, and back, which are saffron yellow. Length 20 in.; wing 9·5 in.