_These birds inhabit the northern parts of Europe, Asia, and America, and generally form their nests on small islands not far from the sea-shore._ The nests of eider ducks are constructed, externally, of marine plants, and lined with white down, which the birds pluck from their own breasts. This is the substance called _eider down_. It is collected, from the nests, by the bird-catchers, who, for that purpose, carefully remove the females, and then take away a certain portion both of down and eggs from each. More down is plucked from their breasts, and more eggs are laid to supply the place of those that have been taken. The nests are plundered in the same manner as before; and when the young ones are fledged, the whole of the down that remains is collected. It is generally reckoned that the down of one nest, after it has been picked and cleansed, will weigh about a quarter of a pound; and the bulk of the whole quantity may easily be imagined, when it is stated that three quarters of an ounce of eider down is more than sufficient to fill the crown of a large hat. The use of this down is for making beds, but, particularly, for making what are called down quilts, a kind of covering almost like a feather bed, which is used in the northern countries of Europe, as a protection against cold, instead of a common quilt, or blanket. The _flesh_ and the _eggs_ of these birds are used for food, and their _skins_ are sewed together and made into under garments by the inhabitants of Greenland. 187. _The PUFFIN_ (Alca arctica, Fig. 49) _is a marine bird about the size of a pigeon, and distinguished by having a large bill compressed at the sides and marked with four grooves; the top of the head, a ring round the throat, and all the upper parts of the plumage, black, and the under parts white._ _These are birds of passage, arriving in this country about the beginning of April, and leaving it in August. They are chiefly found on rocks and elevated ground, in unfrequented places, near the sea-shore._ The breeding of puffins is encouraged in the island of Prestholme, North Wales, and other parts of the British dominions, as a source of profit. The birds, which, in some places, are numerous beyond all calculation, form their nests in holes in the ground, each nest containing only a single white egg. The young ones are seized before they are quite fledged; and, after the bones are taken out, the skin is closed round the flesh, and they are pickled in vinegar impregnated with spices. In this state they are sold as a delicacy for the table. The flesh of the old birds is rank and unpalatable, in consequence of their feeding on seaweeds and fish. We are informed, by Dr. Caius, that in Roman Catholic countries, puffins are permitted to be eaten instead of fish during Lent, and on other fast days.