Rynchops albicollis Swainson, 1838

Taxonomy and Naming

This species has the scientific name Rynchops albicollis Swainson, 1838, historically also known as the Indian scissors-bill.

Breeding Adult Plumage

Adult breeding birds have a black cap that leaves the forehead and nape white, a white body, and a contrasting orange long thick bill with a yellow tip.

Mandible Structure

Like other skimmers, this species has a longer lower mandible than upper mandible; the knife-like lower bill is flexible with a truncated tip, and the upper mandible can move considerably.

Bill Development

Young birds have normal-appearing bills, and the lower mandible grows longer with age.

Body Plumage

The upper body is dark black, and the underparts are white.

Wing Structure and Appearance

Long, pointed wings have a white trailing edge, and the bird has a tern-like appearance.

Size Measurements

It measures 40–43 cm in length with a 108 cm wingspan.

Tail Characteristics

The short, forked tail is white with blackish central feathers.

Leg and Foot Color

Legs and feet are red.

Non-breeding Adult Plumage

Non-breeding adults are duller and browner than breeding birds.

Juvenile Upperpart Plumage

Juveniles are grey-brown on their upperparts, with pale fringes on back and wing feathers.

Juvenile Head and Bill Features

Juveniles have more white on the head than adults, and an orange-brown bill with a dark tip.

Vocalization

This bird makes a high, nasal screaming kyap-kyap call, but is usually very silent.

Similar Species Distinction

It can be distinguished from similar species: the American black skimmer is larger and has a black-tipped bill, the African skimmer is smaller, has more black in the tail, and has no white collar.

General Habitat

This bird inhabits large rivers, lakes, swamps, and coastal wetlands such as estuaries.

Freshwater Habitat Preference

It is most common in freshwater habitats, especially during the breeding season.

Breeding Colony Locations

Breeding colonies form on islands or sandy spits, usually within rivers.

Documented Breeding Sites

Documented breeding locations include the Chambal river area (an important habitat for gharials, which also nest on sand banks here), and the Mahanadi river banks at the Munduli barrage, Chandaka Wildlife Division in Cuttack.

Range Fragmentation Status

In recent decades, the species' range has become increasingly fragmented.

Current Core Range

Currently, it can still be found in parts of Pakistan in the Indus river system of Kashmir, northern and central India along the Ganges, Bangladesh, and Burma.

Extinct Former Range

It formerly occurred in Laos, Cambodia, and Vietnam.

Non-breeding Visitor Range

It is a scarce non-breeding visitor to Nepal.

Vagrant Occurrence Records

It has occurred as a vagrant in Oman and central Thailand, with old records from Iran and China.

Current Stronghold Regions

Today, the species' last strongholds are India and Bangladesh.

Winter Distribution

In winter, the species is more widespread, found in coastal estuaries of western and eastern India; on the western coast it occurs as far south as Karwar, and on the eastern coast it occurs as far south as Chennai and Pondicherry.