The nightingale so nearly resembles the robin in size, form, and manner that he might be taken for that bird but for his clear, brown colour. Like the robin, he feeds on the ground, seeking grubs and insects under the dead leaves, hopping rapidly by fits and starts, standing erect and motionless at intervals as if to listen, and occasionally throwing up his tail and lowering his head and wings, just as the robin does. He inhabits woods, coppices, rough bramble-grown commons, and unkept hedges, and loves best of all a thicket growing by the side of running water. Two or three days after arriving he begins to sing, and continues in song until the middle, or a little past the middle, of June, when the young are hatched. In fine weather he sings at intervals throughout the day, but his music is more continuous and has a more beautiful effect in the evening. For an hour or two after sunset it is perhaps most perfect. In the dark he is silent, but if the moon shines he will continue singing for hours. That is to say, _some_ birds will continue singing; as a rule, not half so many as may be heard during daylight. The nest is nearly always placed on the ground beneath a hedge or close thicket; it is rather large, and composed of dry grass and dead leaves loosely put together, the inside lined with fine dead grass, rootlets, and vegetable down. The eggs are four or five in number, and of a uniform olive-brown colour. During incubation and after the young are hatched the parent birds display the most intense solicitude when the nest is approached, and flit from bough to bough close to the intruder’s head, incessantly repeating two strangely different notes--one low, clear, and sorrowful, the other a harsh, grinding sound. The return migration is in August and September. Whitethroat. Sylvia cinerea. [Illustration: FIG. 27.--WHITETHROAT. ⅓ natural size.] Head ash-grey tinged with brown; rest of upper parts reddish brown; wings dusky, the coverts edged with red; lower parts white faintly tinged with rose colour; tail dark brown, the outer feathers white on the tips and the outer web, the next only tipped with white. _Female_ without the rosy tint on the breast. Length, five and a half inches. * * * * *