Glareola grallaria

Adult Oriental Pratincoles are medium-sized birds with a distinctive forked tail and long, pointed wings, which are noticeable even in the field. Their plumage is predominantly brown with a paler underside, which provides excellent camouflage against the ground. The wings are marked with a dark leading edge and a striking white trailing edge, visible during flight. This bird's face features a small, sharp bill and a white throat bordered by a thin black line, giving it a masked appearance. Juveniles differ slightly, displaying mottled brown plumage that offers improved camouflage. Both sexes appear similar, although females may sometimes appear slightly larger. Unlike some other waders, the Oriental Pratincole exhibits a more buoyant and erratic flight pattern. It is often confused with other pratincoles, but its larger size and distinctive tail shape help in correct identification. When perched, the Oriental Pratincole assumes a more upright posture, reminiscent of a plover, rather than the crouched stance common in other waders.

Primarily insectivorous, the Oriental Pratincole feeds on a variety of insects, including grasshoppers, beetles, and moths. It exhibits seasonal diet changes, with a higher intake of aquatic insects during the rainy season. The bird employs agile aerial foraging techniques, often catching prey in mid-air. It also forages on the ground, picking insects off surfaces or from vegetation. Prey size ranges from small flies to larger grasshoppers, with feeding occurring throughout the day, peaking during cooler morning and late afternoon hours.

The Oriental Pratincole is a social species, often observed in flocks outside the breeding season. During the breeding season, it exhibits territorial behavior, with pairs defending their nesting sites. Courtship displays involve aerial acrobatics and vocalizations, strengthening pair bonds. The species forms loose breeding colonies, with individuals nesting in close proximity yet maintaining distinct territories. In response to predators, Oriental Pratincoles employ distraction displays, such as feigning injury, to protect their nests. Daily activity patterns include periods of rest and preening during the hottest parts of the day, with increased foraging activity at dawn and dusk.

Nesting takes place on the ground, typically in dry, open areas where vegetation is sparse. The nest is a simple scrape in the soil, often lined with small pebbles or plant material. The clutch size generally ranges from two to four eggs, which are cryptically colored to blend with the surroundings. Incubation lasts approximately 18 to 21 days, with both parents sharing duties. Once hatched, the chicks are precocial, leaving the nest shortly after to follow their parents. Fledging occurs in about three to four weeks, with young receiving parental care until they are capable of independent flight. The species may raise one or two broods per breeding season, depending on environmental conditions.

The primary song of the Oriental Pratincole is a series of rapid, trilling notes, delivered in a rhythmic pattern. The pitch is moderately high, and the quality is somewhat harsh, reminiscent of a shrill whistle. Call notes include short, sharp 'chit' sounds, used for communication among flock members. Alarm calls are more urgent and repeated rapidly in response to threats. During the dawn chorus, the bird can be heard calling persistently, adding to the symphony of sounds in its environment. Its vocalizations are distinct yet blend harmoniously with the calls of other grassland species.

• 1The Oriental Pratincole undertakes one of the longest overland migrations of any bird, traveling over 5,000 kilometers from its breeding to wintering grounds.
• 2During migration, flocks of Oriental Pratincoles can number in the thousands, creating spectacular aerial displays.
• 3Unlike many waders, the Oriental Pratincole spends much of its time on the wing, catching insects in flight with remarkable agility.
• 4The species is known for its distinctive 'broken-wing' display, used to lure predators away from its nest.
• 5In some regions, the Oriental Pratincole is considered a beneficial species due to its role in controlling agricultural pest populations.
• 6The bird's forked tail and pointed wings give it a silhouette similar to that of swallows, earning it the nickname 'swallow plover'.
• 7Oriental Pratincoles are known to exploit newly plowed fields, where insects are abundant, benefiting from human agricultural activities.

The IUCN lists the Oriental Pratincole as Least Concern, but its population trend is decreasing due to habitat loss and degradation. Primary threats include agricultural expansion, wetland drainage, and climate change impacts. Conservation efforts focus on habitat protection and management, particularly in key breeding and wintering areas. Historical population changes have seen fluctuations due to the availability of suitable habitats, emphasizing the need for continued monitoring and conservation action to ensure the species' long-term survival.