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Lesser adjutant

January 01, 1970

The lesser adjutant (Leptoptilos javanicus) is a large wading bird in the stork family Ciconiidae. Like other members of its genus, it has a bare neck and head. It is however more closely associated with wetland habitats where it is solitary and is less likely to scavenge than the related greater adjutant. It is a widespread species found from India through Southeast Asia to Java.

Lesser adjutant
Lesser adjutant, Yala National Park
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Ciconiiformes
Family: Ciconiidae
Genus: Leptoptilos
Species:
L. javanicus
Binomial name
Leptoptilos javanicus
(Horsfield, 1821)

Description edit

A large stork with an upright stance, a bare head and neck without a pendant pouch, it has a length of 87–93 cm (34–37 in) (outstretched from bill-to-tail measurement), weighs from 4 to 5.71 kg (8.8 to 12.6 lb) and stands about 110–120 cm (43–47 in) tall.[2][3][4] The only confusable species is the greater adjutant, but this species is generally smaller and has a straight upper bill edge (culmen), measuring 25.8–30.8 cm (10.2–12.1 in) in length, with a paler base and appears slightly trimmer and less hunch-backed. The skullcap is paler and the upper plumage is uniformly dark, appearing almost all black. The nearly naked head and neck have a few scattered hair-like feathers. The upper shank or tibia is grey rather than pink, the tarsus measures 22.5–26.8 cm (8.9–10.6 in). The belly and undertail are white. Juveniles are a duller version of the adult but have more feathers on the nape.[5] During the breeding season, the face is reddish and the neck is orange. The larger median wing coverts are tipped with copper spots and the inner secondary coverts and tertials have narrow white edging. The wing chord measures 57.5–66 cm (22.6–26.0 in) in length. Like others in the genus, they retract their necks in flight. In flight, the folded neck can appear like the pouch of the greater adjutant.[6] Males and females appear similar in plumage but males tend to be larger and heavier billed.[4][7]

Distribution and habitat edit

 
In Sri Lanka

The lesser adjutant is often found in large rivers and lakes inside well wooded regions, in freshwater wetlands in agricultural areas, and coastal wetlands including mudflats and mangroves.[8][9] It is found in India,[10] Nepal,[8] Sri Lanka,[11] Bangladesh (a colony with about 6 nests and 20 individuals was discovered near Thakurgaon in 2011),[12] Myanmar, Thailand, Vietnam, Malaysia, Laos, Singapore,[9] Indonesia and Cambodia.[4] The largest population is in Cambodia. In India they are mainly distributed in the eastern states of Assam, West Bengal and Bihar. It may occur as a vagrant on the southern edge of Bhutan.[13] They are extremely rare in southern India.[14][15] In Sri Lanka, they are found in lowland areas largely within protected areas, though they also use forested wetlands and crop fields.[11] In Nepal, surveys in eastern districts had suggested that they preferentially use forested patches with small wetlands, largely avoiding crop fields.[8] Additional studies, however, are showing the opposite - breeding densities and breeding success of Lesser Adjutant across lowland Nepal are much higher on croplands.[16][17][18]

Behaviour and ecology edit

The lesser adjutant stalks around wetlands feeding mainly on fish, frogs, reptiles, large invertebrates, rodents, small mammals and rarely carrion.[4][9][19] Location of prey appears to be entirely visual, with one observation of storks sitting on telegraphic poles apparently scanning a marsh for prey.[4]

They are largely silent but have been noted to clatter their bill, hiss and moan at the nest.[6] During one of the threat displays called the "Arching display" that is given in the presence of intruders, adults extend their neck and sometimes give a hoarse wail.[20]

Courtship behaviour of the lesser adjutant is identical to other species of the genus Leptoptilos. During pair formation, female birds lift their heads in a scooping motion with bill-clattering (called the "Balancing Posture").[20] They are solitary except during the breeding season when they form loose colonies, never exceeding 20 nests in a single colony.[2][4] The breeding season is February to May in southern India and November to January in north-eastern India, beginning as early as July.[4][21] In central lowland Nepal, nesting in 2015 began in July, and new colonies continued to be initiated until November.[17] The nest is a large platform of sticks placed on a tall tree. In Nepal, nest initiations started in mid-September continuing until mid-November, with all chicks fledging by late-January.[16] The nest diameter is more than a metre and up to a metre deep.[2] The clutch consists of two to four white eggs that are rapidly soiled during incubation.[4][21][22] Incubation period is 28–30 days.[4]

In eastern Nepal, four colonies consisting of 61 nests were all built on the tree species Haldina cordifolia and Bombax ceiba.[8] In central lowland Nepal, 35 colonies with 101 nests were located on four tree species namely Haldina cordifolia, Bombax ceiba, Ficus benghalensis and Ficus religiosa with the majority of colonies located on Bombax ceiba trees.[23] Another study the subsequent year across five locations along lowland Nepal monitored 65 colonies with 206 nests from which 280 chicks fledged, and the most frequently used tree species were B. ceiba, H. cordifolia and F. religiosa respectively.[18] Other tree species on which nests have been found in India and Myanmar include Alstonia scholaris and Salmalia malabarica with some nests located as high as 46 m.[19] Nests have not yet been located in Sri Lanka, though young birds have been observed feeding in crop fields and in freshwater wetlands.[11] The average size of 35 colonies with a total of 101 nests in central, lowland Nepal was 2.9 nests, ranging in size from one nest to 13 nests.[16] Location of colonies in central lowland Nepal was not related to tree density available on the landscape suggesting that nest trees are still adequate here. However, lesser adjutant storks strongly selected non-domestic trees almost entirely, also preferring trees that were much taller and bigger relative to available trees on the landscape.[23] Religious beliefs and agro-forestry practices appear to be responsible for retaining trees that are preferred by lesser adjutants for locating their colonies.

Breeding success in lowland Nepal was positively correlated to colony size, possibly due to reduced predation at colonies.[17] Colony-level breeding success was also impacted by extent of wetlands around colonies, which ameliorated negative impacts of proximity to human habitation. Colonies located on trees in agricultural landscapes of lowland Nepal had a higher breeding success relative to colonies located on trees in forested areas or protected wetland preserves suggesting that current agricultural practices with one season of flooded crops (rice during the monsoon season) followed by winter crops that need some pulsed irrigation (e.g. wheat) are conducive to Lesser Adjutant breeding.[17] Multi-site evaluations showed Lesser Adjutants used cues such as tree height to locate colonies, with taller trees hosting bigger colonies, which in turn resulted in higher fledging success.[18]

Adult storks took an average of 30 minutes to return to nests with food for nestlings and fledglings, though there was considerable variation in this measure. Time taken to return to nests by adults was impacted by colony size, age of chicks, amount of wetlands around colonies, and the progression of the season.[16] Adults returned faster when brood sizes were higher, but took longer to return as chicks aged. The breeding season in Nepal extended from the middle of the monsoon, when the primary crop on the landscape was flooded rice, to winter, when the cropping was much more mixed and the landscape was much drier. This variation was clearly represented in the changing amount of time it took adults to return to nest after finding food.[16] They returned much faster during the monsoon, but took longer when the crops changed and the landscape dried out suggesting that changing cropping patterns can have serious implications on their ability to raise chicks.

A lesser adjutant paired and hybridized with a painted stork at Dehiwala Zoo, Sri Lanka and at Kuala Lumpur Zoo.[4] The hybrid young had plumage and bill-size of the adjutant, but stance and bill shape of the painted stork.

Conservation edit

The Lesser Adjutants were moved from "Least Concern" to "Vulnerable" in 2020, but this reclassification was based nearly entirely by assumptions that were based on surveys in forested areas. The assumptions asserted that the species was relatively rare, and that it was affected to their detriment by agricultural expansions.[8] Subsequent work in South Asia, that has been far more detailed and nuanced, with analyses covering robust colony-level and landscape-level evaluations, have shown these assumptions to be incorrect and likely part of generic assumptions that appear to be overlaid on all agricultural areas and birds by scientists in developed countries.[16][17][18][23] Like for many other large waterbirds, the south-east Asian populations of Lesser Adjutant storks appear to be greatly at risk due to a combination of hunting and habitat destruction.[3][24] Subsequently, additional research has shown their population sizes to be much higher than previous estimates that were based on guesses. The assertion that this species was declining rapidly was also found to be incorrect given the high breeding success and large number of breeding colonies documented across lowland Nepal. Subsequently, the conservation status of the species was downlisted to "Near Threatened" to more appropriate reflect evidence.

Images edit

  •  
    Nesting at Nehra, Darbhanga, Bihar
  •  
    In flight at Nehra, Darbhanga, Bihar
  •  
    In flight at Dadara, Assam

References edit

  1. ^ BirdLife International (2017). "Leptoptilos javanicus". IUCN Red List of Threatened Species. 2017: e.T22697713A110481858. doi:10.2305/IUCN.UK.2017-1.RLTS.T22697713A110481858.en. Retrieved 12 November 2021.
  2. ^ a b c Ali, S; SD Ripley (1978). Handbook of the Birds of India and Pakistan. Volume 1 (2nd ed.). New Delhi: Oxford University Press. pp. 107–109.
  3. ^ a b Elliot, A. (1994). "Order Ciconiiformes. Family Ciconiidae (Storks)". In del Hoyo, J.; A. Elliot; J. Sargatal (eds.). Handbook of the Birds of the World. Volume 1. Ostrich to Ducks. Barcelona, Spain: Lynx Edicions. pp. 436–465.
  4. ^ a b c d e f g h i j Hancock, James A.; Kushan, James A.; Kahl, M. Philip. (1992) Storks, Ibises and Spoonbills of the World. Princeton University Press. ISBN 978-0-12-322730-0
  5. ^ Blanford, WT (1898). The Fauna of British India. Birds. Volume 4. London: Taylor and Francis. pp. 374–375.
  6. ^ a b Rasmussen PC; JC Anderton (2005). Birds of South Asia. The Ripley Guide. Volume 2. Washington DC and Barcelona: Smithsonian Institution and Lynx Edicions. p. 64.
  7. ^ Weckauf R; M Handschuh (2011). (PDF). Cambodian Journal of Natural History (1): 23–28. Archived from the original (PDF) on 2014-07-15. Retrieved 2012-03-31.
  8. ^ a b c d e Baral HS (2005). (PDF). Forktail. 21: 190–193. Archived from the original (PDF) on 2008-10-11.
  9. ^ a b c Subaraj, R.; Lok, A. F. S. L. (2009). "Status of the Lesser Adjutant (Leptoptilos javanicus) in Singapore". Nature in Singapore. 2: 107–113.
  10. ^ "Biswanath youths join hands to protect bortukulas". The Assam Tribune. 84 (263): 8. 2022-09-28.
  11. ^ a b c de Silva, Thilina, N.; Fernando, Sumundu; de Silva, Haritha, B.; Tennakoon, Parami (2015). "Lesser Adjutant Leptoptilos javanicus Horsfield, 1821 (Ciconiiformes: Ciconiidae) in the dry lowlands of Sri Lanka: distribution, ecology, and threats". Journal of Threatened Taxa. 7 (14): 8089–8095. doi:10.11609/jott.2425.7.14.8089-8095. ISSN 0974-7893.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  12. ^ Sayam U. Chowdury; MSH Sourav (2012). "Discovery of a Lesser Adjutant Leptoptilos javanicus breeding colony in Bangladesh". BirdingASIA. 17 (17): 57–59.
  13. ^ Choudhury, A. (2005). (PDF). Forktail. 21: 164–165. Archived from the original (PDF) on 2008-10-11.
  14. ^ Andheria, A. P. (2001). "Sighting of the Black Stork Ciconia nigra and Lesser Adjutant Stork Leptoptilos javanicus at Nagarhole National Park, Karnataka". J. Bombay Nat. Hist. Soc. 98 (3): 443–445.
  15. ^ Andheria, A. (2003). "First sighting of lesser adjutant-stork Leptoptilos javanicus from Sanjay Gandhi National Park, Mumbai". J. Bombay Nat. Hist. Soc. 100 (1): 111.
  16. ^ a b c d e f Sundar, K.S.G.; Maharjan, Bijay; Koju, Roshila; Kittur, Swati; Gosai, Kamal Raj (2016). "Factors Affecting Provisioning Times of Two Stork Species in Lowland Nepal". Waterbirds. 39 (4): 365–374. doi:10.1675/063.039.0406.
  17. ^ a b c d e Sundar, K.S. Gopi; Koju, Roshila; Maharjan, Bijay; Marcot, Bruce G.; Kittur, Swati; Gosai, Kamal Raj (2019). "First assessment of factors affecting the breeding success of two stork species in lowland Nepal using Bayesian Network models]". Wildfowl. 69: 45–69.
  18. ^ a b c d Katuwal, Hem B.; Sundar, K. S. Gopi; Zhang, Mingxia; Rimal, Bhagawat; Baral, Hem S.; Sharma, Hari P.; Ghimire, Prashant; Hughes, Alice C.; Quan, Rui-Chang (2022). "Factors affecting the breeding ecology of the globally threatened Lesser Adjutant (Leptoptilos javanicus) in agricultural landscapes of Nepal". Avian Conservation and Ecology. 17 (2): 15. doi:10.5751/ACE-02235-170215.
  19. ^ a b Kahl, M. P. (1970). "Observations on the breeding of storks in India and Ceylon". Journal of the Bombay Natural History Society. 67: 453–461.
  20. ^ a b Kahl, M. P. (1972). "Comparative ethology of the Ciconiidae. Part 2. The Adjutant Storks, Leptoptilos dubius (Gmelin) and L. javanicus (Horsfield)". Ardea. 60: 97–111.
  21. ^ a b Baker, ECS (1929). Fauna of British India. Birds. Volume 6 (2nd ed.). London: Taylor and Francis. pp. 329–330.
  22. ^ Maust, M.; Clum, N. & Sheppard, C. (2007). "Ontogeny of chick behavior: a tool for monitoring the growth and development of lesser adjutant storks". Zoo Biol. 26 (6): 533–538. doi:10.1002/zoo.20156. PMID 19360599.
  23. ^ a b c Koju, Roshila; Maharjan, Bijay; Gosai, K.R.; Kittur, Swati; Sundar, K.S. Gopi (2020). "Ciconiiformes nesting on trees in cereal-dominated farmlands: importance of scattered trees for heronries in lowland Nepal". Waterbirds. 42 (4): 355–365. doi:10.1675/063.042.0401. S2CID 210861485.
  24. ^ Goes, F. (2013). The Birds of Cambodia: An Annotated Checklist. Cambodia: Centre for Biodiversity Conservation, Fauna and Flora International Cambodia Programme and Royal University of Phnom Penh, Phnom Penh.

External links edit

 
Wikispecies has information related to Leptoptilos javanicus.
 
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January 01, 1970
lesser, adjutant, lesser, adjutant, leptoptilos, javanicus, large, wading, bird, stork, family, ciconiidae, like, other, members, genus, bare, neck, head, however, more, closely, associated, with, wetland, habitats, where, solitary, less, likely, scavenge, tha. The lesser adjutant Leptoptilos javanicus is a large wading bird in the stork family Ciconiidae Like other members of its genus it has a bare neck and head It is however more closely associated with wetland habitats where it is solitary and is less likely to scavenge than the related greater adjutant It is a widespread species found from India through Southeast Asia to Java Lesser adjutant Lesser adjutant Yala National Park Conservation status Near Threatened IUCN 3 1 1 Scientific classification Domain Eukaryota Kingdom Animalia Phylum Chordata Class Aves Order Ciconiiformes Family Ciconiidae Genus Leptoptilos Species L javanicus Binomial name Leptoptilos javanicus Horsfield 1821 Contents 1 Description 2 Distribution and habitat 3 Behaviour and ecology 4 Conservation 5 Images 6 References 7 External linksDescription editA large stork with an upright stance a bare head and neck without a pendant pouch it has a length of 87 93 cm 34 37 in outstretched from bill to tail measurement weighs from 4 to 5 71 kg 8 8 to 12 6 lb and stands about 110 120 cm 43 47 in tall 2 3 4 The only confusable species is the greater adjutant but this species is generally smaller and has a straight upper bill edge culmen measuring 25 8 30 8 cm 10 2 12 1 in in length with a paler base and appears slightly trimmer and less hunch backed The skullcap is paler and the upper plumage is uniformly dark appearing almost all black The nearly naked head and neck have a few scattered hair like feathers The upper shank or tibia is grey rather than pink the tarsus measures 22 5 26 8 cm 8 9 10 6 in The belly and undertail are white Juveniles are a duller version of the adult but have more feathers on the nape 5 During the breeding season the face is reddish and the neck is orange The larger median wing coverts are tipped with copper spots and the inner secondary coverts and tertials have narrow white edging The wing chord measures 57 5 66 cm 22 6 26 0 in in length Like others in the genus they retract their necks in flight In flight the folded neck can appear like the pouch of the greater adjutant 6 Males and females appear similar in plumage but males tend to be larger and heavier billed 4 7 Distribution and habitat edit nbsp In Sri Lanka The lesser adjutant is often found in large rivers and lakes inside well wooded regions in freshwater wetlands in agricultural areas and coastal wetlands including mudflats and mangroves 8 9 It is found in India 10 Nepal 8 Sri Lanka 11 Bangladesh a colony with about 6 nests and 20 individuals was discovered near Thakurgaon in 2011 12 Myanmar Thailand Vietnam Malaysia Laos Singapore 9 Indonesia and Cambodia 4 The largest population is in Cambodia In India they are mainly distributed in the eastern states of Assam West Bengal and Bihar It may occur as a vagrant on the southern edge of Bhutan 13 They are extremely rare in southern India 14 15 In Sri Lanka they are found in lowland areas largely within protected areas though they also use forested wetlands and crop fields 11 In Nepal surveys in eastern districts had suggested that they preferentially use forested patches with small wetlands largely avoiding crop fields 8 Additional studies however are showing the opposite breeding densities and breeding success of Lesser Adjutant across lowland Nepal are much higher on croplands 16 17 18 Behaviour and ecology editThe lesser adjutant stalks around wetlands feeding mainly on fish frogs reptiles large invertebrates rodents small mammals and rarely carrion 4 9 19 Location of prey appears to be entirely visual with one observation of storks sitting on telegraphic poles apparently scanning a marsh for prey 4 They are largely silent but have been noted to clatter their bill hiss and moan at the nest 6 During one of the threat displays called the Arching display that is given in the presence of intruders adults extend their neck and sometimes give a hoarse wail 20 Courtship behaviour of the lesser adjutant is identical to other species of the genus Leptoptilos During pair formation female birds lift their heads in a scooping motion with bill clattering called the Balancing Posture 20 They are solitary except during the breeding season when they form loose colonies never exceeding 20 nests in a single colony 2 4 The breeding season is February to May in southern India and November to January in north eastern India beginning as early as July 4 21 In central lowland Nepal nesting in 2015 began in July and new colonies continued to be initiated until November 17 The nest is a large platform of sticks placed on a tall tree In Nepal nest initiations started in mid September continuing until mid November with all chicks fledging by late January 16 The nest diameter is more than a metre and up to a metre deep 2 The clutch consists of two to four white eggs that are rapidly soiled during incubation 4 21 22 Incubation period is 28 30 days 4 In eastern Nepal four colonies consisting of 61 nests were all built on the tree species Haldina cordifolia and Bombax ceiba 8 In central lowland Nepal 35 colonies with 101 nests were located on four tree species namely Haldina cordifolia Bombax ceiba Ficus benghalensis and Ficus religiosa with the majority of colonies located on Bombax ceiba trees 23 Another study the subsequent year across five locations along lowland Nepal monitored 65 colonies with 206 nests from which 280 chicks fledged and the most frequently used tree species were B ceiba H cordifolia and F religiosa respectively 18 Other tree species on which nests have been found in India and Myanmar include Alstonia scholaris and Salmalia malabarica with some nests located as high as 46 m 19 Nests have not yet been located in Sri Lanka though young birds have been observed feeding in crop fields and in freshwater wetlands 11 The average size of 35 colonies with a total of 101 nests in central lowland Nepal was 2 9 nests ranging in size from one nest to 13 nests 16 Location of colonies in central lowland Nepal was not related to tree density available on the landscape suggesting that nest trees are still adequate here However lesser adjutant storks strongly selected non domestic trees almost entirely also preferring trees that were much taller and bigger relative to available trees on the landscape 23 Religious beliefs and agro forestry practices appear to be responsible for retaining trees that are preferred by lesser adjutants for locating their colonies Breeding success in lowland Nepal was positively correlated to colony size possibly due to reduced predation at colonies 17 Colony level breeding success was also impacted by extent of wetlands around colonies which ameliorated negative impacts of proximity to human habitation Colonies located on trees in agricultural landscapes of lowland Nepal had a higher breeding success relative to colonies located on trees in forested areas or protected wetland preserves suggesting that current agricultural practices with one season of flooded crops rice during the monsoon season followed by winter crops that need some pulsed irrigation e g wheat are conducive to Lesser Adjutant breeding 17 Multi site evaluations showed Lesser Adjutants used cues such as tree height to locate colonies with taller trees hosting bigger colonies which in turn resulted in higher fledging success 18 Adult storks took an average of 30 minutes to return to nests with food for nestlings and fledglings though there was considerable variation in this measure Time taken to return to nests by adults was impacted by colony size age of chicks amount of wetlands around colonies and the progression of the season 16 Adults returned faster when brood sizes were higher but took longer to return as chicks aged The breeding season in Nepal extended from the middle of the monsoon when the primary crop on the landscape was flooded rice to winter when the cropping was much more mixed and the landscape was much drier This variation was clearly represented in the changing amount of time it took adults to return to nest after finding food 16 They returned much faster during the monsoon but took longer when the crops changed and the landscape dried out suggesting that changing cropping patterns can have serious implications on their ability to raise chicks A lesser adjutant paired and hybridized with a painted stork at Dehiwala Zoo Sri Lanka and at Kuala Lumpur Zoo 4 The hybrid young had plumage and bill size of the adjutant but stance and bill shape of the painted stork Conservation editThe Lesser Adjutants were moved from Least Concern to Vulnerable in 2020 but this reclassification was based nearly entirely by assumptions that were based on surveys in forested areas The assumptions asserted that the species was relatively rare and that it was affected to their detriment by agricultural expansions 8 Subsequent work in South Asia that has been far more detailed and nuanced with analyses covering robust colony level and landscape level evaluations have shown these assumptions to be incorrect and likely part of generic assumptions that appear to be overlaid on all agricultural areas and birds by scientists in developed countries 16 17 18 23 Like for many other large waterbirds the south east Asian populations of Lesser Adjutant storks appear to be greatly at risk due to a combination of hunting and habitat destruction 3 24 Subsequently additional research has shown their population sizes to be much higher than previous estimates that were based on guesses The assertion that this species was declining rapidly was also found to be incorrect given the high breeding success and large number of breeding colonies documented across lowland Nepal Subsequently the conservation status of the species was downlisted to Near Threatened to more appropriate reflect evidence Images edit nbsp Nesting at Nehra Darbhanga Bihar nbsp In flight at Nehra Darbhanga Bihar nbsp In flight at Dadara AssamReferences edit BirdLife International 2017 Leptoptilos javanicus IUCN Red List of Threatened Species 2017 e T22697713A110481858 doi 10 2305 IUCN UK 2017 1 RLTS T22697713A110481858 en Retrieved 12 November 2021 a b c Ali S SD Ripley 1978 Handbook of the Birds of India and Pakistan Volume 1 2nd ed New Delhi Oxford University Press pp 107 109 a b Elliot A 1994 Order Ciconiiformes Family Ciconiidae Storks In del Hoyo J A Elliot J Sargatal eds Handbook of the Birds of the World Volume 1 Ostrich to Ducks Barcelona Spain Lynx Edicions pp 436 465 a b c d e f g h i j Hancock James A Kushan James A Kahl M Philip 1992 Storks Ibises and Spoonbills of the World Princeton University Press ISBN 978 0 12 322730 0 Blanford WT 1898 The Fauna of British India Birds Volume 4 London Taylor and Francis pp 374 375 a b Rasmussen PC JC Anderton 2005 Birds of South Asia The Ripley Guide Volume 2 Washington DC and Barcelona Smithsonian Institution and Lynx Edicions p 64 Weckauf R M Handschuh 2011 A method for identifying the sex of lesser adjutant storks Leptoptilos javanicus using digital photographs PDF Cambodian Journal of Natural History 1 23 28 Archived from the original PDF on 2014 07 15 Retrieved 2012 03 31 a b c d e Baral HS 2005 Surveys for Lesser Adjutant Leptoptilos javanicus in and around Koshi Tappu Wildlife Reserve Nepal PDF Forktail 21 190 193 Archived from the original PDF on 2008 10 11 a b c Subaraj R Lok A F S L 2009 Status of the Lesser Adjutant Leptoptilos javanicus in Singapore Nature in Singapore 2 107 113 Biswanath youths join hands to protect bortukulas The Assam Tribune 84 263 8 2022 09 28 a b c de Silva Thilina N Fernando Sumundu de Silva Haritha B Tennakoon Parami 2015 Lesser Adjutant Leptoptilos javanicus Horsfield 1821 Ciconiiformes Ciconiidae in the dry lowlands of Sri Lanka distribution ecology and threats Journal of Threatened Taxa 7 14 8089 8095 doi 10 11609 jott 2425 7 14 8089 8095 ISSN 0974 7893 a href Template Cite journal html title Template Cite journal cite journal a CS1 maint multiple names authors list link Sayam U Chowdury MSH Sourav 2012 Discovery of a Lesser Adjutant Leptoptilos javanicus breeding colony in Bangladesh BirdingASIA 17 17 57 59 Choudhury A 2005 First record of Lesser Adjutant Leptoptilos javanicus for Bhutan PDF Forktail 21 164 165 Archived from the original PDF on 2008 10 11 Andheria A P 2001 Sighting of the Black Stork Ciconia nigra and Lesser Adjutant Stork Leptoptilos javanicus at Nagarhole National Park Karnataka J Bombay Nat Hist Soc 98 3 443 445 Andheria A 2003 First sighting of lesser adjutant stork Leptoptilos javanicus from Sanjay Gandhi National Park Mumbai J Bombay Nat Hist Soc 100 1 111 a b c d e f Sundar K S G Maharjan Bijay Koju Roshila Kittur Swati Gosai Kamal Raj 2016 Factors Affecting Provisioning Times of Two Stork Species in Lowland Nepal Waterbirds 39 4 365 374 doi 10 1675 063 039 0406 a b c d e Sundar K S Gopi Koju Roshila Maharjan Bijay Marcot Bruce G Kittur Swati Gosai Kamal Raj 2019 First assessment of factors affecting the breeding success of two stork species in lowland Nepal using Bayesian Network models Wildfowl 69 45 69 a b c d Katuwal Hem B Sundar K S Gopi Zhang Mingxia Rimal Bhagawat Baral Hem S Sharma Hari P Ghimire Prashant Hughes Alice C Quan Rui Chang 2022 Factors affecting the breeding ecology of the globally threatened Lesser Adjutant Leptoptilos javanicus in agricultural landscapes of Nepal Avian Conservation and Ecology 17 2 15 doi 10 5751 ACE 02235 170215 a b Kahl M P 1970 Observations on the breeding of storks in India and Ceylon Journal of the Bombay Natural History Society 67 453 461 a b Kahl M P 1972 Comparative ethology of the Ciconiidae Part 2 The Adjutant Storks Leptoptilos dubius Gmelin and L javanicus Horsfield Ardea 60 97 111 a b Baker ECS 1929 Fauna of British India Birds Volume 6 2nd ed London Taylor and Francis pp 329 330 Maust M Clum N amp Sheppard C 2007 Ontogeny of chick behavior a tool for monitoring the growth and development of lesser adjutant storks Zoo Biol 26 6 533 538 doi 10 1002 zoo 20156 PMID 19360599 a b c Koju Roshila Maharjan Bijay Gosai K R Kittur Swati Sundar K S Gopi 2020 Ciconiiformes nesting on trees in cereal dominated farmlands importance of scattered trees for heronries in lowland Nepal Waterbirds 42 4 355 365 doi 10 1675 063 042 0401 S2CID 210861485 Goes F 2013 The Birds of Cambodia An Annotated Checklist Cambodia Centre for Biodiversity Conservation Fauna and Flora International Cambodia Programme and Royal University of Phnom Penh Phnom Penh External links edit nbsp Wikispecies has information related to Leptoptilos javanicus nbsp Wikimedia Commons has media related to Leptoptilos javanicus Photographs and videos Retrieved from https en wikipedia org w index php title Lesser adjutant amp oldid 1214308795, wikipedia, wiki, book, books, library,

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