The Sri Lanka frogmouth, Sri Lankan frogmouth or Ceylon frogmouth (Batrachostomus moniliger) is a small frogmouth found in the Western Ghats of south India and Sri Lanka. Related to the nightjars, it is nocturnal and is found in forest habitats. The plumage coloration resembles that of dried leaves and the bird roosts quietly on branches, making it difficult to see. Each has a favourite roost that it uses regularly unless disturbed. It has a distinctive call that is usually heard at dawn and dusk. The sexes differ slightly in plumage.
This bird reaches 23 centimetres (9.1 in) in length. Like all frogmouths, this species has a wide and hooked bill with slit-like nostrils and the large head with eyes facing forward to provide a wide field of binocular vision. Compared to others of its genus it has small wings, which are distinguished by the wing coverts ending in black spots tipped with white.[2] The male is gray-brown with fine barring and a spotted crown. Some males are browner and look more similar to females. The female is more rufous or chestnut brown. Indian female birds have very fine black speckles on the crown but Sri Lankan females may lack or may have reduced markings.[3] The bird also has short, stiff bristles in front of and surrounding the eyes. The Western Ghats population, ssp. roonwali (named after Mithan Lal Roonwal), looks very slightly different. The male has a brownish-gray wing mirror and yellowish spots on the undersides, compared to gray or white in the nominate Sri Lankan form. The female has a bright reddish-brown wing mirror and the wings are unspotted below.[4][5]
Habitat and distributionedit
This species is found in the Western Ghats of southwest India and Sri Lanka. Its habitat is tropical forest, usually with dense undergrowth.[6] It can sometimes be found in more disturbed habitats, including plantations.[7][8] Its presence may be overlooked due to its nocturnal behaviour and camouflage.[9]
Behaviouredit
This frogmouth is rarely seen during the day except at roost sites or when flushed. It regularly uses the same roost spot for months.[10] When alarmed at its perch, it slowly moves its head, pointing its bill upward, and it can easily be mistaken for a jagged, broken branch. It relies on this crypsis and will often sit still a long time before making an escape.[11] It may open its mouth wide in a threat display.[10] Like its congeners, it feeds on insects, catching them in flight or gleaning them from the ground or tree branches.[3] It is sometimes mobbed at its day roost by small songbirds.[3] It is vocal at dusk, the call of the female being a loud, screechy "shkeerauuw" which drops in volume and ends is a series of hiccups. Another call is a series of rapid "skwar-skwar-skwar" which is produced by both male and female.[3]
The breeding season in southern India is January to April, and in Sri Lanka February to March. The nest is a small pad made of moss lined with down and covered on the outside with lichens and bark. The bird incubates a single white egg, covering the nest and holding the tail flush with the tree, taking on the outline of a lichen-covered snag. The male often broods during the day, while both parents share the duty during the night.[11][12] After the chick fledges, the male destroys the nest. The parents often use the same branch for multiple nestings.[13] The juvenile may stay with the parents for a couple of months, huddling between them at the roost.[10]
B. m. moniliger female on nest, Gal Oya, Sri Lanka
B. m. roonwali on a nest with a recently hatched chick
B. m. roonwali young bird (middle) with adult female to left and male to right
^BirdLife International (2016). "Batrachostomus moniliger". IUCN Red List of Threatened Species. 2016: e.T22689603A95214771. doi:10.2305/IUCN.UK.2016-3.RLTS.T22689603A95214771.en. Retrieved 12 November 2021.
^Marshall, JT (1978). Systematics of smaller Asian night birds based on voice. Ornithological Monographs 25(PDF). American Ornithologists' Union. p. 28.
^ abcdRasmussen PC & Anderton, JC (2005). Birds of South Asia. The Ripley Guide. Volume 2. Washington DC & Barcelona: Smithsonian Institution and Lynx Edicions. pp. 249–250.
^Dutta BB (2009). "Studies of the Ceylone [sic] Frogmouth, Batrachostomus moniliger Blyth from India, with the description of a new sub-species from Western Ghats". Rec. Zool. Survey India. 109 (2): 79–85.
^Martens J, Bahr N (2011). "Documentation of new bird taxa, 5. Report for 2009" (PDF). Vogelwarte. 49: 85–104.
^Sugathan, R (1981). "A survey of the Ceylon Frogmouth (Batrachostomus moniliger) habitat in the Western Ghats of India". J. Bombay Nat. Hist. Soc. 78 (2): 309–316.
^Kannan, R. (1993). Recent sightings of the Ceylon Frogmouth, Batrachostomus moniliger, in India. Bulletin of the Oriental Bird Club 17, May 1993.
^Borges, Renee (1986). "On the occurrence of the Ceylon frogmouth (Batrachostomus moniliger) in north Kanara, Karnataka". Journal of the Bombay Natural History Society. 83 (1): 200.
^Kumara, H.N.; Singh, M. (2006). "Ceylon Frogmouth Batrachostomus moniliger Blyth in the rainforests of the Western Ghats, Karnataka". J. Bombay Nat. Hist. Soc. 103 (1): 100.
^ abcKannan, R (1994). "Notes on the status and ecology of the Ceylon Frogmouth (Batrachostomus moniliger Blyth) from the Anaimalai Hills of Tamil Nadu". J. Bombay Nat. Hist. Soc. 91 (3): 454–455.
^ abPhillips, W. W. A. (1947). "A Note on the Nesting of the Ceylon Frogmouth, Batrachostomus moniliger Blyth". Ibis. 89 (3): 515–516. doi:10.1111/j.1474-919X.1947.tb04373.x.
^Ali, S & Ripley, S D (1983). Handbook of the Birds of India and Pakistan. Volume 4 (2nd ed.). New Delhi: Oxford University Press. pp. 1–3.
^Jayarathna, K D Thandula (2004). (PDF). Forktail. 20: 129–130. Archived from the original (PDF) on 28 March 2012.
External linksedit
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Calls on Xeno-Canto
February 20, 2024
lanka, frogmouth, lankan, frogmouth, ceylon, frogmouth, batrachostomus, moniliger, small, frogmouth, found, western, ghats, south, india, lanka, related, nightjars, nocturnal, found, forest, habitats, plumage, coloration, resembles, that, dried, leaves, bird, . The Sri Lanka frogmouth Sri Lankan frogmouth or Ceylon frogmouth Batrachostomus moniliger is a small frogmouth found in the Western Ghats of south India and Sri Lanka Related to the nightjars it is nocturnal and is found in forest habitats The plumage coloration resembles that of dried leaves and the bird roosts quietly on branches making it difficult to see Each has a favourite roost that it uses regularly unless disturbed It has a distinctive call that is usually heard at dawn and dusk The sexes differ slightly in plumage Sri Lanka frogmouthA pair of ssp roonwali with female on right source source CallsConservation statusLeast Concern IUCN 3 1 1 Scientific classificationDomain EukaryotaKingdom AnimaliaPhylum ChordataClass AvesClade StrisoresOrder PodargiformesFamily PodargidaeGenus BatrachostomusSpecies B moniligerBinomial nameBatrachostomus moniligerBlyth 1849 Contents 1 Description 2 Habitat and distribution 3 Behaviour 4 References 5 External linksDescription editThis bird reaches 23 centimetres 9 1 in in length Like all frogmouths this species has a wide and hooked bill with slit like nostrils and the large head with eyes facing forward to provide a wide field of binocular vision Compared to others of its genus it has small wings which are distinguished by the wing coverts ending in black spots tipped with white 2 The male is gray brown with fine barring and a spotted crown Some males are browner and look more similar to females The female is more rufous or chestnut brown Indian female birds have very fine black speckles on the crown but Sri Lankan females may lack or may have reduced markings 3 The bird also has short stiff bristles in front of and surrounding the eyes The Western Ghats population ssp roonwali named after Mithan Lal Roonwal looks very slightly different The male has a brownish gray wing mirror and yellowish spots on the undersides compared to gray or white in the nominate Sri Lankan form The female has a bright reddish brown wing mirror and the wings are unspotted below 4 5 Habitat and distribution editThis species is found in the Western Ghats of southwest India and Sri Lanka Its habitat is tropical forest usually with dense undergrowth 6 It can sometimes be found in more disturbed habitats including plantations 7 8 Its presence may be overlooked due to its nocturnal behaviour and camouflage 9 Behaviour editThis frogmouth is rarely seen during the day except at roost sites or when flushed It regularly uses the same roost spot for months 10 When alarmed at its perch it slowly moves its head pointing its bill upward and it can easily be mistaken for a jagged broken branch It relies on this crypsis and will often sit still a long time before making an escape 11 It may open its mouth wide in a threat display 10 Like its congeners it feeds on insects catching them in flight or gleaning them from the ground or tree branches 3 It is sometimes mobbed at its day roost by small songbirds 3 It is vocal at dusk the call of the female being a loud screechy shkeerauuw which drops in volume and ends is a series of hiccups Another call is a series of rapid skwar skwar skwar which is produced by both male and female 3 The breeding season in southern India is January to April and in Sri Lanka February to March The nest is a small pad made of moss lined with down and covered on the outside with lichens and bark The bird incubates a single white egg covering the nest and holding the tail flush with the tree taking on the outline of a lichen covered snag The male often broods during the day while both parents share the duty during the night 11 12 After the chick fledges the male destroys the nest The parents often use the same branch for multiple nestings 13 The juvenile may stay with the parents for a couple of months huddling between them at the roost 10 nbsp B m moniliger female on nest Gal Oya Sri Lanka nbsp B m roonwali on a nest with a recently hatched chick nbsp B m roonwali young bird middle with adult female to left and male to right nbsp B m roonwali at Thattekad Bird Sanctuary IndiaReferences edit BirdLife International 2016 Batrachostomus moniliger IUCN Red List of Threatened Species 2016 e T22689603A95214771 doi 10 2305 IUCN UK 2016 3 RLTS T22689603A95214771 en Retrieved 12 November 2021 Marshall JT 1978 Systematics of smaller Asian night birds based on voice Ornithological Monographs 25 PDF American Ornithologists Union p 28 a b c d Rasmussen PC amp Anderton JC 2005 Birds of South Asia The Ripley Guide Volume 2 Washington DC amp Barcelona Smithsonian Institution and Lynx Edicions pp 249 250 Dutta BB 2009 Studies of the Ceylone sic Frogmouth Batrachostomus moniliger Blyth from India with the description of a new sub species from Western Ghats Rec Zool Survey India 109 2 79 85 Martens J Bahr N 2011 Documentation of new bird taxa 5 Report for 2009 PDF Vogelwarte 49 85 104 Sugathan R 1981 A survey of the Ceylon Frogmouth Batrachostomus moniliger habitat in the Western Ghats of India J Bombay Nat Hist Soc 78 2 309 316 Kannan R 1993 Recent sightings of the Ceylon Frogmouth Batrachostomus moniliger in India Bulletin of the Oriental Bird Club 17 May 1993 Borges Renee 1986 On the occurrence of the Ceylon frogmouth Batrachostomus moniliger in north Kanara Karnataka Journal of the Bombay Natural History Society 83 1 200 Kumara H N Singh M 2006 Ceylon Frogmouth Batrachostomus moniliger Blyth in the rainforests of the Western Ghats Karnataka J Bombay Nat Hist Soc 103 1 100 a b c Kannan R 1994 Notes on the status and ecology of the Ceylon Frogmouth Batrachostomus moniliger Blyth from the Anaimalai Hills of Tamil Nadu J Bombay Nat Hist Soc 91 3 454 455 a b Phillips W W A 1947 A Note on the Nesting of the Ceylon Frogmouth Batrachostomus moniliger Blyth Ibis 89 3 515 516 doi 10 1111 j 1474 919X 1947 tb04373 x Ali S amp Ripley S D 1983 Handbook of the Birds of India and Pakistan Volume 4 2nd ed New Delhi Oxford University Press pp 1 3 Jayarathna K D Thandula 2004 Observations on a nest of Sri Lanka Frogmouth Batrachostomus moniliger PDF Forktail 20 129 130 Archived from the original PDF on 28 March 2012 External links edit nbsp Wikimedia Commons has media related to Batrachostomus moniliger Internet Bird Collection Calls on Xeno Canto Retrieved from https en wikipedia org w index php title Sri Lanka frogmouth amp oldid 1183027601, wikipedia, wiki, book, books, library,
