Consequently birds of numerous different species make Sikkim their habitat, either permanently or for certain seasons of the year. And Gammie, who has specially studied the natural history of Sikkim, says in the "Sikkim Gazetteer" that in no part of the world of an equal area are birds more profusely represented in species. The birds may not be so numerous as in other parts, but they are more varied. Between five and six hundred species are represented, varying from the great vulture known as the lammergeyer, which is 9 1/2 feet across the outstretched wing, down to the tiny flower-pecker, barely exceeding 3 inches from the end of its beak to the tip of its tail. Of the birds found in the forest itself, the honey-suckers or sun-birds are perhaps the most beautiful. There are no gorgeous birds of paradise, and even resplendent parrots are not very numerous. But these little sun-birds glitter like jewels among the leafy foliage, and the lustrous metallic hues of different shades with which they are richly coloured on the head and long tail-feathers change and flash in the sunlight with every slightest movement. Not all so brilliant in colour but very delightful to watch are the fly-catchers. Of these there are no less than twenty-six species, the most remarkable being the fairy blue-chat, which is brilliantly marked with different shades of glistening blue, and another which is strikingly coloured in almost uniform verditer blue. In the very lowest valleys is found the beautiful paradise fly-catcher, with a long-pointed black crest, the rest of the plumage white with black shafts and the tail 14 inches in length. The quickness and agility this lovely bird displays as it darts and twists and turns in the pursuit of butterflies in their uneven dodging flight is one of the marvels of forest life. Game-birds are not abundant, but four species of pheasant are found, of which the largest and handsomest is the moonal, bronze-green glossed with gold and with a tail of cinnamon red. Sportsmen in the Himalaya are familiar with the sight of this radiantly-coloured bird swishing down the mountain-side with apparently the speed and almost the brilliancy of a flash of lightning. Not so handsome as the moonal, being small and greyish in colour on the back, is the blood-pheasant, remarkable for its blood-red streaks on the breast and its blood-red under-tail-coverts.