1. Golden Oriole. 2. Shag. 3. Gadwall. 4. Willow Wren. 5. Richardson's Skua. 6. Marsh Warbler. 7. Goshawk. 8. Pintail. 9. Arctic Tern. 10. Blue-headed Wagtail. ] THE GOLDEN ORIOLE. This bird is, to a very great extent, an accidental visitor to our shores, but it is thought by eminent authorities that it would become a common breeder with us were it not so dear to the heart of the collector. It has bred in several of the southern counties of England, and suspends its nest, which is composed of strips of bark, wool, sedge, grass, and leaves, with an inner lining of flower-heads of grass, beneath the forks of a large horizontal branch at some considerable height from the ground. The eggs number four to five or six, are white or light creamy-white, spotted with purplish-brown and underlying markings of grey. THE OSPREY. The Osprey, now only met with in one or two remote parts of Scotland, employs sticks, turf, moss, and wool in the construction of its bulky nest, which it builds on the top of a tall tree or ruin. The eggs number three, sometimes four, varying from white to creamy-white in ground colour, beautifully marked, and especially so at the larger end, as a rule with rich reddish-brown. The markings vary considerably. THE WHITE WAGTAIL. Although this bird is the Continental representative of our Pied Wagtail, there are on record many well-authenticated instances of its breeding in this country. It differs from the Pied Wagtail in being bluish or slate grey, where that bird is black, below the nape. Its nest, and the situation in which it is placed, do not differ from that of the bird just named. The eggs are also similar, but are said to be subject to greater variation in colour and markings. THE BLUE-HEADED WAGTAIL. The nest of this somewhat rare visitor has several times been found in Northumberland, and it has in all probability nested on many occasions elsewhere, without its identity being clearly established. The nest is made of dry grass, fine roots, and moss, lined with hair and occasionally a few feathers, and is situated on a bank or amongst grass or corn in a similar position to that of the Yellow Wagtail. The eggs number five as a rule, but six are sometimes found, of a yellowish-white ground colour, spotted, freckled, and clouded with light brown, and occasionally streaked on the larger end with fine blackish-brown lines. MONTAGU'S HARRIER. Although this bird rarely breeds with us now, its nest has occasionally been met with in recent years in the southern counties. The nest is placed on the ground amongst heath, fern, furze, or growing crops, and consists of a few twigs, straws, and bits of dead grass. Its eggs number from four to six, of a faint bluish-white, and are on rare occasions marked with a few light reddish-brown spots. [Illustration: EGGS.