The black-winged stilt, common stilt, or pied stilt (Himantopus himantopus) is a widely distributed very long-legged wader in the avocet and stilt family (Recurvirostridae). Opinions differ as to whether the birds treated under the scientific name H. himantopus ought to be treated as a single species and if not, how many species to recognize. The scientific name Himantopus comes from the Greek meaning "strap foot" or "thong foot". Most sources today accept 2–4 species.

An egret is a bird that is any of several herons, most of which are white or buff, and several of which develop fine plumes (usually milky white) during the breeding season.

Many egrets are members of the genera Egretta or Ardea which also contain other species named as herons rather than egrets. The distinction between a heron and an egret is rather vague, and depends more on appearance than biology. The word "egret" comes from the French word "aigrette" that means both "silver heron" and "brush", referring to the long filamentous feathers that seem to cascade down an egret's back during the breeding season.

Thol Wildlife Sanctuary is situated across Ahmedabad district and Mehsana district of Gujarat state, India.

Thol Wildlife Sanctuary is a shallow water reservoir situated 25 km (15 mi) northwest of Ahmedabad and most popular birding place near Ahmedabad after Nal Sarovar Bird Sanctuary which is about 50 km (30 mi) from Thol Wildlife Sanctuary. Geographically Thol Wildlife Sanctuary falls in Mehsana district of North Gujarat. Kadi, a taluka headquarters of the district, is just 22 km (14 mi) away from the Sanctuary. Thol Wildlife Sanctuary is a man-made(made by Sayajirao Gayakvad, Ruler of Baroda) irrigation tank built in 1912 with water storage capacity of 84,000,000 m3 (68,000 ac·ft) and command area of 1450 ha (5.6 mi2) and catchment area of 153 km2 (59 mi2).The wetland is predominated by the open water habitat, which is surrounded by cropland, fallow land and scrub land. Due to its popul