The green woodpecker, our largest native species, often betrays itself by its remarkable cry, reminiscent of a laugh--"ha, ha, ha," and "pleu, pleu, pleu." Keep quite still, and presently, as likely as not, it will suddenly make its appearance with a rapid, undulating flight. As it alights on some neighbouring tree-trunk, its identity will be finally established by its green back and wings, yellow rump, and crimson crown. It ascends the tree by jerky leaps. Where ant-hills abound it may often be seen on the ground, moving about with awkward hops, exploring the hills for ants. The greater and lesser spotted woodpecker may also sometimes be seen here, especially if there is much old timber about. In spring its presence is often made known by a peculiar drumming sound--never forgotten when once heard--made by excessively rapid blows with its beak on the trunk, or branch of a tree. On the wing it may be recognized by its "dipping" flight, and strikingly piebald appearance. At close quarters the strongly contrasted black and white plumage is relieved by crimson undertail-coverts, and a crimson crown. The lesser-spotted woodpecker is a much smaller bird--about the size of a sparrow, or chaffinch--and is barred with black and white; there is a patch of crimson on the head of the male. It has a habit of keeping more to the upper branches of the tree than the other species: but, like its greater cousin, it "drums" on the tree during the spring, but less loudly. Its spring cry, "pee-pee-pee," is like that of the wryneck. This is a near relation of the woodpeckers, but very different in coloration, being beautifully mottled and vermiculated with grey and brown. But for its spring cry, just alluded to, it would escape notice altogether, so closely does it match the bough it is perched upon. Unlike the woodpeckers its tail-feathers are not developed to form stiff, pointed spines. This is accounted for by the fact that, though it ascends tree-trunks readily, it does not hammer at the bark with its beak, and so does not need stiff tail-feathers to afford leverage. Its flight is slow and hesitating. It is commonest, it may be remarked, on the south-east of England. [Illustration: _Great Spotted Woodpeckers_] [Illustration: Drumming Snipe.] CHAPTER VII. How to tell Birds on the Wing (_continued_). "The seamew's lonely laughter Flits down the flowing wave; The green scarts follow after The surge where cross-tides rave."--_Fiona Macleod._ Falcons--golden eagle--harriers and sparrow-hawk--The heron--The cormorant, shag, and gannet--The petrels--Guillemots, razor-bills, and puffins--The ducks--The great crested grebe and dabchick--The pigeons--The "plover tribe"--The gulls and terns--The game birds.