The Indian scimitar babbler (''Pomatorhinus horsfieldii'') is an

Old World babbler The Old World babblers or Timaliidae are a family of mostly Old World passerine birds. They are rather diverse in size and coloration, but are characterised by soft fluffy plumage. These are birds of tropical areas, with the greatest variety in S ...

. It is found in peninsular India in a range of forest habitats. They are most often detected by their distinctive calls which include an antiphonal duet by a pair of birds. They are often hard to see as they forage through dense vegetation. The long curved yellow,

scimitar A scimitar ( or ) is a single-edged sword with a convex curved blade associated with Middle Eastern, South Asian, or North African cultures. A European term, ''scimitar'' does not refer to one specific sword type, but an assortment of different ...

-shaped bills give them their name. It has been treated in the past as subspecies of the white-browed scimitar babbler which is found along the Himalayas but now separated into two species, the peninsular Indian species and the Sri Lanka scimitar babbler (''Pomatorhinus melanurus'').

Description

The most distinctive feature of this 22 cm long bird is the long down-curved yellow bill which is blackish at the base of the upper mandible. It has a striking head pattern, with a long white supercilium above a broad black band through the eye. The white throat and breast contrast with the dark greyish brown on the upperside and dark grey to black on most of the underside. The tail is broad, long and graduated. They have short, round wings and being weak fliers are rarely seen flying in the open. Indian scimitar-babblers have long down-curved yellow bills, used to work through the leaf litter and bark in search of their food which is mainly insects and berries. They can be difficult to observe in the dense vegetation they prefer, but like many other babblers, these are noisy birds, and the characteristic bubbling calls are often the best indication that these birds are present. The call itself consists of a loud fluty ''oop-pu-pu-pu'' followed immediately by a ''krukru''. The second note is produced by the female and the duet is accurately synchronized.

Leucistic Leucism () is a wide variety of conditions that result in the partial loss of pigmentation in an animal—causing white, pale, or patchy coloration of the skin, hair, feathers, scales, or cuticles, but not the eyes. It is occasionally spelled ' ...

plumages have been recorded.

Distribution

It is the only scimitar babbler in Peninsular India. This species is found south of a line between Rajasthan and Orissa.

Taxonomy and systematics

The Old World babblers are a large family of

passerine A passerine () is any bird of the order Passeriformes (; from Latin 'sparrow' and '-shaped'), which includes more than half of all bird species. Sometimes known as perching birds, passerines are distinguished from other orders of birds by t ...

bird Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweigh ...

s characterised by soft fluffy plumage. They are birds of tropical areas, with the greatest variety in southeast

Asia Asia (, ) is one of the world's most notable geographical regions, which is either considered a continent in its own right or a subcontinent of Eurasia, which shares the continental landmass of Afro-Eurasia with Africa. Asia covers an area ...

. This species is very close to the Sri Lanka scimitar babbler which has in the past been treated as a subspecies. In the past, this species has been considered as a subspecies of the white-browed scimitar babbler (''Pomatorhinus schisticeps'') which is found along the Himalayan foothills. Molecular studies confirm this relatedness. There are several races that have been noted, race ''travancoreensis'' is found in the Western Ghats south of Goa and is darker (see

Gloger's rule Gloger's rule is an ecogeographical rule which states that within a species of endotherms, more heavily pigmented forms tend to be found in more humid environments, e.g. near the equator. It was named after the zoologist Constantin Wilhelm Lambert ...

). The nominate ''horsfieldii'' is found in the plains in the southern part of the peninsula. The race ''obscurus'' of the dry zone in the northwest (Madhya Pradesh, Rajasthan and Gujarat; possibly Orissa) is lighter and greyer. Race ''maderaspatensis'' of the

Eastern Ghats The Eastern Ghats are a discontinuous range of mountains along India's eastern coast. The Eastern Ghats pass through Odisha, Andhra Pradesh to Tamil Nadu in the south passing some parts of Karnataka as well as Telangana. They are eroded and cut ...

is intermediate in plumage between the nominate form and ''obscurus''. Race ''maderaspatensis'' lacks the black base to the upper mandible and the bill is shorter. It has been recorded from the

Palkonda Hills Palkonda Hills are a range of hills that form a part of the Eastern Ghats in the southern Indian state of Andhra Pradesh. Meaning "milk hills", they run along a northwest to southeast direction, culminating at the pilgrimage centre of Tirupati. ...

Nallamalai Hills The Nallamalas (also called the Nallamalla Range) are a section of the Eastern Ghats which forms the eastern boundary of Rayalaseema region of the state of Andhra Pradesh and Nagarkurnool district of the state of Telangana, in India. They run ...

, Kurumbapatti and

Shevaroy Hills The Selvarayan hills, with the anglicised name Shevaroy Hills, are a towering mountain range (1620 m) near the city of Salem, in Tamil Nadu state, southern India. It is one of the major hill stations in Tamil Nadu and in the Eastern Ghats. The loc ...

. The Sri Lankan form that was considered as a subspecies, ''melanurus'', has been elevated to a full species by some works that note the geographic isolation and distinctive calls. The Sri Lankan form, however, responds to playback of the call of the Indian form.

Behaviour and ecology

The Indian scimitar babbler is a resident breeder (non- migratory) bird. Its habitat is forest and secondary growth mainly in the hilly regions. They feed on insects on the ground or on vegetation. Hopping on the ground, they may turn over leaves or probe in leaf litter for prey. They may sometimes join

mixed-species foraging flock A mixed-species feeding flock, also termed a mixed-species foraging flock, mixed hunting party or informally bird wave, is a flock of usually insectivorous birds of different species that join each other and move together while foraging. These ar ...

s. They breed from December to May. The nest is a large and loose globular mass of foliage concealed in a bush on the ground or low down. They usually lay three eggs (but varies from two to four) which are pure white in colour.

References

External links

Internet Bird Collection
{{Taxonbar, from=Q1318011

Indian scimitar babbler The Indian scimitar babbler (''Pomatorhinus horsfieldii'') is an Old World babbler. It is found in peninsular India in a range of forest habitats. They are most often detected by their distinctive calls which include an antiphonal duet by a pair ...

Endemic birds of India