The black-winged stilt is a black and white wading bird with incredibly long legs. They live in a variety of wetlands, from marshes to coastal lagoons. They wade through the water, plucking insects from the surface.
The Black-winged stilt (Himantopus himantopus) is one of the most fascinating waders seen on the banks of the many water-bodies in our country. Proportionately the longest legged of the waders, with the exception of the flamingo, the tall, lanky, slender-necked, Blackwinged stilt presents a stark visual contrast. Its black wings and white neck and underparts give it the distinctive look of a formally dressed dinner guest! The bright red legs and red iris provide an added dash of colour. In winter both sexes are fairly similar in appearance with dabs of greyish-brown on their heads and necks. The sooty-brown wings of the female are, however, duller than those of the male, which have an added metallic, blue-green sheen. With the onset of summer the adult male sports darker spots on his head extending down to his neck.
Members of the genus Himantopus, are a very variable species, (upto eight are recognised) of which the Black-winged is one. They have an extremely broad breeding range, from temperate to tropical climates and from rain forests to deserts, spreading over Eurasia, Africa, Australia and the Americas. Most members of this family are, however, nomadic, moving as conditions change, with a few northern hemisphere populations migrating over short distances.
The Black-winged stilt is both a resident and a visitor in India. Every winter it makes its way south in small flocks and settles on the edges of marshes, lakes, rivers and tidal areas all over the Indian peninsula. In summer these flocks move northwards again, to nest in the lakes and rivers of northern India, north-west Pakistan and Afghanistan.
A masterpiece of evolution, the Black-winged stilt fits perfectly into a special eco-niche in the shallows which few other waders have managed to exploit as successfully. This eco-niche consists of reasonably clear water, rich in aquatic life, ranging in depth from four to twelve inches. At this depth its long wading legs give the stilt an edge over most other waders like sandpipers and the diminutive stints, allowing them to explore comparatively deeper areas thereby reducing competition, by providing a wider feeding zone. Interestingly, in this feeding zone, most ducks too find themselves `out of their depth' as the area is too shallow for them to `upend' easily. This small, specific area is, therefore, almost exclusively the preserve of the stilt.
The stilt's legs dangle gracefully under its body in flight. Interestingly, the bird lowers or raises them as the need arises, using them to adjust its air-speed and also as a `rudder'.
The stilt's remarkable legs, almost ten inches long, are usually stretched neatly out behind the bird when flying, though for short hops they merely dangle about. Much to my amusement I discovered that the bird, despite the awkward length of its legs is still able to scratch its head with one foot outstretched over a wing. While flying the stilt must use a fairly rapid wing-beat and interestingly, it adjusts its air-speed by raising or lowering its legs, which are also used as rudders of sorts. To land, the bird glides gracefully downwards, wings held horizontally, and pushes its legs forward at the very last moment to come to a running or hopping halt. While observing flocks of stilts, their acrobatic techniques provide considerable entertainment. I have occasionally seen a bird drop its legs in the air, hover above the ground like an aircraft and then descend vertically on both feet. No less fascinating is the manner in which the delicate wader moves along the shoreline. It proceeds through the water with a jerky, high-stepping gait, lifting each leg well out of the water by bending its knee at right angles, before placing the foot gingerly down again in front.
