In its food and habits it does not differ from its congeners, with whom it may often be found associating.
In winter the adult is grey on the upper parts and white below, with a few greyish flecks or bars on the upper breast. The young bird is browner, with light margins to the feathers of the back, the breast pale buff pink, with a few grey flecks. In nuptial plumage the head and neck are reddish brown, streaked with black; upper parts black, the feathers having marginal spots of chestnut and white tips; under parts chestnut, spotted with black; vent and flanks whitish, mottled with black. Length 10 in.; bill 1·5 in.; wing 6·5 in.
THE SANDERLING
Calidris arenaria (Linnæus)
From its habit of frequenting sandy stretches along our shores, and less frequently near inland lakes, this species has gained its trivial name. To this country it is only a migrant, young birds arriving from their northerly breeding-grounds as early as the middle of August; the old birds follow a week or so later, many of them still retaining traces of the nuptial plumage. They stay with us only a short time, and early in October the majority have left us to winter on the shores of the Mediterranean, very few remaining behind. In May the return migration commences, but they only stay for a very short time to rest and then continue their journey to the Far North.
Their food consists entirely of marine insects, sand-hoppers, and other crustacea, but at their summer-quarters large quantities of the northern saxifrage are consumed. It is very tame, allowing a close approach as it runs about on the sand, and appears conspicuously white among the Dunlins and other shore-birds with which it consorts. The note is a sharp “wick.”
Its breeding range is entirely circumpolar, and the eggs are greenish, spotted with brown, not unlike miniature Curlew’s.
In its winter plumage, in which it is most commonly met with in this country, the upper parts are pale grey and the under parts white. In its spring plumage the feathers of the back are black, with rufous margins; the chin, throat, and breast chestnut, with a few dark brown spots; vent white. In autumn the rufous edgings on the back of the old birds have almost entirely worn away. Length 8 in.; bill 0·9 in.; wing 4·7 in.
This species may always be distinguished by the absence of the hind toe.
In autumn the young have the back black, spotted with white; the under parts white, with traces of buff on the sides of the breast.