Low rocky islands are the favourite breeding places of this Gull, and they are now particularly numerous at the Farne Islands, where I have seen the eggs lying about so thickly that the visitor had to exercise great care to avoid treading upon them. Sometimes quite a large quantity of seaweed is used in making the nest, at others a few bits of grass and roots, and in some cases, where bare peat earth is available, simply a hollow is scratched out. The eggs as a rule number three, but sometimes only two are met with. I have seen it stated that the bird occasionally lays four, but out of the hundreds of nests I have examined I have never had the luck to see that number. In coloration they vary from pale greyish-green to reddish-brown, blotched and spotted with blackish- and greyish-brown. Sometimes the markings take the form of streaks. The eggs, although as a rule darker than those of the Herring Gull, are very difficult to distinguish, and I have found no safe method short of watching the parent birds on the nest. THE GREAT BLACK-BACKED GULL. The flat-topped summits of rocks, stacks, and high maritime cliffs are the usual situation for this Gull's nest; however, I have met with it on comparatively low rocky islets in Highland sea-lochs. It does not breed on the East Coast of England. Its nest is made of bits of heather, dead grass, seaweed, and sometimes a few feathers, and varies in size. The eggs number three, but sometimes only two are found, greyish-brown or stone colour, tinged with olive and spotted with blackish-brown and dark grey. THE BLACK GROUSE. This bird places its nest amongst deep heather, long grass, and rushes, ferns, and brambles, in suitable moorland parts of England, Wales, and Scotland. It is simply a hollow lined with a few bits of fern, heath, or dead grass. The eggs number six to ten, or even more, yellowish-white to buff, spotted with rich reddish-brown. I have generally found it through putting the hen off her nest. THE MARSH WARBLER. A situation such as that afforded by a stunted bush overgrown with weeds and close to water of some kind, chiefly in the southern counties of England, is said to be chosen by the Marsh Warbler for its nest. It employs grass-stems and leaves, moss and spiders' webs, in the construction of its nest, with an inner lining of horsehair. The eggs number from five to seven, and vary considerably in coloration. One type is said to be greenish-white, spotted, blotched, and marbled with olive-brown, and another greenish-blue, blotched and spotted with olive-brown and grey underlying marks. It is a rare and local breeder with us. THE SNOW BUNTING.