Representative of a family which is essentially associated with tropical climes, he still wears his brilliant dress in these northern latitudes, and resembles, as he darts with rapid flight down our rivers and streams, some huge turquoise. Having fixed on a favourite piece of water, he seldom wanders far afield, but may be seen at all times of the year, sitting on an overhanging bough, ever and anon dropping into the water to seize some passing fish. His prey being captured, he returns to his perch and kills the struggling fish by knocking it against his stand; it is then swallowed head first, and he resumes his motionless watch. If sport be slow, and he be hungry, he will wend his way with rapid flight down the river to try his luck in another place, and it is at such times that we shall probably get a momentary glimpse of his brilliancy, till a curve in the stream hides him from sight. [Illustration: KINGFISHER _Alcedo ispida_] Mere cold does not seem to affect him in the least, but when the streams are frozen he suffers greatly from hunger, and after a day or two of frosty weather he reluctantly leaves his accustomed home for the milder reaches of the sea-shore, where the restless tide brings him in a continual supply of food. The sea-shore, however, is not to his taste, and at the first break-up of the frost he returns again to his inhospitable home. Early in April he turns his attention to housekeeping. Like most bright-plumaged birds, he has no song with which to woo his mate, but at such times they may often be seen chasing each other about up and down the stream, uttering their shrill and sharp call-note. A perpendicular wall in the bank of the river is chosen, and near the top of this they excavate a long low tunnel with the end slightly widened out to form a chamber. The nest is peculiar, being formed of a mass of small regurgitated bones, and on this the six pure white and highly glossed eggs are laid. As soon as the young are fledged and thoroughly able to earn their own living, they are driven away from their home and forced to seek winter-quarters elsewhere. Many, especially in the northern portions of its range, go to the sea-shore and migrate, while others seek out some quiet stream where they may fish in undisputed possession, till the return of spring impels them to seek a mate and form a home for themselves. The sexes are practically alike in plumage. The top of the head, wings, and malar stripe are dark greenish blue, mottled with lighter; back and rump brilliant cobalt blue; tail dark blue. The under parts, lores, and ear coverts are chestnut; throat whitish; bill black, orange at the base; legs deep red. The young bird is duller and shows traces of greenish on the breast. Length 7·5 in.; wing 3 in. THE ROLLER Coracias garrulus, Linnæus