|Himalayan wolf in the Upper Mustang region of Annapurna Conservation Area, Nepal|
C. l. chanco
|Canis lupus chanco|
|Himalayan wolf distribution (red dots in highlands) compared with the holarctic grey wolf (blue dots in lowlands)|
The Himalayan wolf (Canis lupus chanco) is a canine of debated taxonomy. It is distinguished by its genetic markers, with mitochondrial DNA indicating that it is genetically basal to the Holarctic grey wolf, genetically the same wolf as the Tibetan wolf, and has an association with the African golden wolf (Canis lupaster). No striking morphological differences are seen between the wolves from the Himalayas and those from Tibet. The Himalayan wolf lineage can be found living in the Himalayas, the Tibetan Plateau, and the Central Asian highlands predominantly above 4,000 m in elevation because it has adapted to a low-oxygen environment, compared with other wolves that are found only at lower elevations.
Some authors have proposed the reclassification of this lineage as a separate species. In 2019, a workshop hosted by the IUCN/SSC Canid Specialist Group noted that the Himalayan wolf's distribution included the Himalayan range and the Tibetan Plateau. The group recommends that this wolf lineage be known as the "Himalayan wolf" and classified as Canis lupus chanco until a genetic analysis of the holotypes is available. The Himalayan wolf lacks a proper morphological analysis.
Canis chanco was the scientific name proposed by John Edward Gray in 1863, who described a skin of a wolf that was shot in Chinese Tartary. This specimen was classified as a wolf subspecies Canis lupus chanco by St. George Jackson Mivart in 1880. In the 19th and 20th centuries, several zoological specimens were described:
- Canis niger by Philip Sclater in 1874 was a wolf specimen collected near Hanle in Kashmir.
- Lupus filchneri by Paul Matschie in 1907 was a wolf skin from Xining in China's Qinghai province. It had been collected by Wilhelm Filchner during an expedition to China and Tibet in 1903–1905.
- Lupus karanorensis by Matschie in 1907 was a skin and a skull of a wolf that was shot in an oasis near Dunhuang in China in 1894.
- Lupus tschiliensis by Matschie in 1907 was a skull of a wolf specimen that was shot in the coastal region of China's Zhili province.
- Canis lupus coreanus by Yoshio Abe in 1923 was a wolf specimen from the vicinity of Seoul in the Korean Peninsula.
In 1938, Glover Morrill Allen classified these specimens as synonyms for C. l. chanco. In 1941, Reginald Pocock corroborated this assessment after reviewing wolf skins and skulls in the collection of the Natural History Museum, London. In 2005, W. Christopher Wozencraft also listed C. l. niger, C. l. filchneri, C. l. karanorensis, and C. l. tschiliensis as synonyms for C. l. chanco.
Canis himalayensis was proposed by Aggarwal et al. in 2007 for wolf specimens from the Indian Himalayas that differed in mitochondrial DNA from specimens collected in other parts of India. In April 2009, Canis himalayensis was proposed as a distinct wolf species through the Nomenclature Specialist on the CITES Animals Committee. The proposal was based on one study that relied on only a limited number of museum and zoo samples that may not have been representative of the wild population. The committee recommended against this proposal, but suggested that the name be entered into the CITES species database as a synonym for Canis lupus. The committee stated that the classification was for conservation purposes only, and did not "reflect the latest state of taxonomic knowledge". Further fieldwork was called for. This genetic lineage shows a 3.9% divergence in the mDNA cytochrome b gene when compared with the Holarctic grey wolf, which may justify it being classified as a distinct species. In 2019, a workshop hosted by the IUCN/SSC Canid Specialist Group noted that the Himalayan wolf's distribution included the Himalayan range and the Tibetan Plateau. The group determined that the earliest available Latin name is Canis chanco Gray, 1863, but the geographic location of the holotype is unclear. The group recommends that this wolf lineage be known as the "Himalayan wolf" and classified as Canis lupus chanco until a genetic analysis of the holotypes is available. In 2020, further research on the Himalayan wolf indicates that it warrants species-level recognition under the Unified Species Concept, the Differential Fitness Species Concept, and the Biological Species Concept. It was identified as an evolutionary significant unit that warranted assignment onto the IUCN Red List for its protection.
The mitochondrial DNA of 27 wolves from the Himalayas and the Tibetan Plateau was compared in 2004. Results indicate that five related haplotypes formed a clade that is basal to all other wolves. This clade included one sample from Ladakh, nine from the Spiti Valley in Himachal Pradesh, four from Nepal, and two from Tibet. The Himalayan wolf clade diverged from other canids 800,000 years ago. Seven wolves from Kashmir did not fall into this clade. The mtDNA of 18 captive wolves in the Padmaja Naidu Himalayan Zoological Park was analysed in 2007. Results showed that they shared a common female ancestor. As this study was based on captive-bred zoo specimens that had descended from only two females, these samples were not considered to be representative. Additionally, the wolf population in the Kashmir Valley is known to have recently arrived in that area. Subsequent genetic research showed that wolf samples from Tibet are genetically basal to the Holarctic gray wolf. Its MT-ND4L gene commences with the base pairs GTG, whereas all other canids commence with ATG. Results of whole genome sequencing showed that it is the most genetically divergent wolf.
Analysis of scat samples from two wolves collected in upper Dolpo matched the Himalayan wolf. Fecal remains of four wolves collected in the upper Mustang region of the Annapurna Conservation Area also fell within the Himalayan wolf clade but formed a separate haplotype from those previously studied.
The Himalayan wolf population in Tibet declined over the past 25,000 years and suffered a historical population bottleneck. Glaciation during the Last Glacial Maximum may have caused habitat loss, genetic isolation, and ancient inbreeding. The population in Qinghai had grown, though, showing a gene flow of 16% from Chinese indigenous dogs and 2% of the dingo's genome. It probably recolonised the Tibetan Plateau. The Himalayan wolf contrasts with the wolves living at lower elevations in Inner Mongolia, Mongolia, and Xinjiang province. Some wolves in China and Mongolia also fall within the Himalayan wolf clade, indicating a common maternal ancestor and a wide distribution. There was evidence of hybridization with the grey wolf at Sachyat-Ertash in the Issyk-Kul region of Kyrgyzstan, and of introgression from either the grey wolf or the dog into the Himalayan wolf in Nepal.
A genomic study on the wolves of China included museum specimens of wolves from southern China that were collected between 1963 and 1988. The wolves in the study formed three clades: north Asian wolves that included those from northern China and eastern Russia, wolves from the Tibetan Plateau, and a unique population from southern China. One specimen located as far southeast as Jiangxi province shows evidence of being admixed between Tibetan-related wolves and other wolves in China.
|Phylogenetic tree of the extant wolf-like canids with timing in millions of years[a]|
|Blue shading represents the species Canis lupus
DNA sequences can be mapped to reveal a phylogenetic tree that represents evolutionary relationships, with each branch point representing the divergence of two lineages from a common ancestor. On this tree, the term “basal” is used to describe a lineage that forms a branch diverging nearest to the common ancestor.
Admixture with an unknown wolf-like canid
The Tibetan mastiff breed was able to adapt to the extreme highland conditions of the Tibetan Plateau very quickly, comparably to other mammals such as the yak, the Tibetan antelope, the snow leopard, and the wild boar. The Tibetan mastiff's ability to avoid hypoxia in high elevations due to its higher hemoglobin levels compared to low-altitude dogs, was due to prehistoric interbreeding with the wolves of Tibet.
In 2020, a genomic analysis indicates that the wolves of the Himalayas and the Tibetan plateau are closely related. These wolves have an admixed history which includes grey wolves, dogs, and a ghost population of an unknown wolf-like canid. This ghost population is deeply-diverged from modern Holarctic wolves and dogs, has contributed 39% to the Himalayan wolf's nuclear genome, and contributed the EPAS1 allele which can be found in both Himalayan wolves and dogs which allows them to live in high altitudes.
Relationship with the African golden wolf
In 2011, the Indian wolf, Himalayan wolf, and African golden wolf were proposed to represent ancient wolf lineages, with the African golden wolf having colonised Africa prior to the Northern Hemisphere radiation of the Holarctic grey wolf.
Two studies of the mitochondrial genome of both modern and extinct grey wolves (Canis lupus) have been conducted, but these excluded the genetically divergent lineages of the Himalayan wolf and the Indian wolf. The ancient specimens were radiocarbon dated and stratigraphically dated, and together with DNA sequences, a time-based phylogenetic tree was generated for wolves. The study inferred that the most recent common ancestor for all other Canis lupus specimens – modern and extinct – was 80,000 years before present. An analysis of the Himalayan wolf mitochondrial genome indicates that the Himalayan wolf diverged between 740,000—691,000 years ago from the lineage that would become the Holarctic grey wolf.
Between 2011 and 2015, two mDNA studies found that the Himalayan wolf and Indian grey wolf were genetically closer to the African golden wolf than they were to the Holarctic grey wolf. From 2017, two studies based on mDNA, and X-chromosome and Y-chromosome markers taken from the cell nucleus, indicate that the Himalayan wolf is genetically basal to the Holarctic grey wolf. Its degree of divergence from the Holarctic grey wolf is similar to the degree of divergence of the African golden wolf from the Holarctic grey wolf. The Himalayan wolf shares a maternal lineage with the African golden wolf. It possesses a unique paternal lineage that falls between the grey wolf and the African golden wolf. The results of these two studies imply that the Himalayan wolf distribution range extends from the Himalayan range north across the Tibetan Plateau up to the Qinghai Lake region in China’s Qinghai Province.
In 2018, whole genome sequencing was used to compare members of the genus Canis. The African golden wolf was found to be the descendant of a genetically admixed canid of 72% grey wolf and 28% Ethiopian wolf ancestry. The Ethiopian wolf does not share the single-nucleotide polymorphisms that confer hypoxia adaptation with the Himalayan wolf. The adaptation of the Ethiopian wolf to living in high elevations may occur at other single-nucleotide polymorphism locations. This indicates that the Ethiopian wolf's adaptation has not been inherited by descent from a common ancestor shared with the Himalayan wolf.
The Himalayan wolf has a thick, woolly fur that is dull earthy-brown on the back and tail, and yellowish-white on the face, belly, and limbs. It is about 110 cm (45 in) long and 76 cm (30 in) tall at the shoulder. It is larger than the Indian wolf. It has closely spaced black speckles on the muzzle, below the eyes, and on the upper cheeks and ears. It weighs about 35 kg (77 lb).
The heart of the Himalayan wolf withstands the low oxygen level at high elevations. It has a strong selection for RYR2, a gene that initiates cardiac excitation.
Distribution and habitat
In northern India, it occurs in the Ladakh region of eastern Kashmir and in the Lahaul and Spiti region in northeastern Himachal Pradesh. In 2004, the Himalayan wolf population in India was estimated to consist of 350 individuals ranging across an area of about 70,000 km2 (27,000 sq mi). Between 2005 and 2008, it was sighted in the alpine meadows above the treeline northeast of Nanda Devi National Park in Uttarakhand. In 2013, a wolf was photographed by a camera trap installed at an elevation around 3,500 m (11,500 ft) near the Sunderdhunga Glacier in Uttarakhand's Bageshwar district.
In Nepal, it was recorded in Api Nampa Conservation Area, Upper Dolpa, Humla, Manaslu, Upper Mustang, and the Kanchenjunga Conservation Area. The Nepal Himalayas provide an important habitat refuge for the Himalayan wolf.
Behaviour and ecology
The howls of the Himalayan wolf have lower frequencies, unmodulated frequencies, and are shorter in duration compared to Holarctic wolf howls. The Himalayan and North African wolves have the most acoustically distinct howls and differ significantly from each other and the Holarctic wolves.
Himalayan wolves prefer wild over domestic prey. They prefer the smaller Tibetan gazelle than the larger white-lipped deer, and they prefer the plains-dwelling Tibetan gazelle over the cliff-dwelling bharal. Supplementary food includes the small Himalayan marmot, woolly hare, and pikas. Himalayan wolves avoided livestock where wild prey is available, but habitat encroachment and the depletion of wild prey populations is forecast to lead to conflict with herders. To protect these wolves, securing healthy wild prey populations through setting aside wildlife habitat reserves and refuges will be important. Kiang, Siberian roe deer, Siberian ibex, Przewalski's horse, wild yak, argali, urial, markhor, Bactrian deer, Yarkand deer, and Tibetan red deer have also been recorded as prey species of Himalayan wolves.
Historical sources indicate that wolves occasionally killed children in Ladakh and Lahaul. Within the proposed Gya-Miru Wildlife Sanctuary in Ladakh, the intensity of livestock depredation, assessed in three villages, found that Tibetan wolves were the most important predators accounting for 60% of the total livestock losses, followed by the snow leopard and Eurasian lynx. The most frequent prey were domestic goats (32%), followed by sheep (30%), yaks (15%), and horses (13%). The wolves killed horses significantly more, and goats less, than would be expected from their relative abundance.
The wolf in Bhutan, India, Nepal, and Pakistan is listed on CITES Appendix I. In India, the wolf is protected under Schedule I of the Wildlife Protection Act, 1972, which prohibits hunting; a zoo needs a permission from the government to acquire a wolf. It is listed as endangered in Jammu and Kashmir, Himachal Pradesh, and Uttarakhand, where a large portion of the wolf population lives outside the protected area network. Lack of information about its basic ecology in this landscape is an obstacle for developing a conservation plan. In Nepal, it is protected under Schedule I of the National Parks and Wildlife Conservation Act, 2029 (1973) prohibiting hunting it. In China, the wolf is listed as vulnerable in the Red List of China’s Vertebrates, and hunting it is banned.
In 2007, 18 Himalayan wolves were kept for breeding in two Indian zoos. They were captured in the wild and were kept at the Padmaja Naidu Himalayan Zoological Park in West Bengal, and in the Kufri Zoo in Himachal Pradesh.
- For a full set of supporting references refer to the note (a) in the phylotree at Evolution of the wolf#Wolf-like canids
- Gray, J. E. (1863). "Notice of the Chanco or Golden Wolf (Canis chanco) from Chinese Tartary". Proceedings of the Zoological Society of London: 94.
- Werhahn, G.; Senn, H.; Ghazali, M.; Karmacharya, D.; Sherchan, A. M.; Joshi, J.; Kusi, N.; López-Bao, J. V.; Rosen, T.; Kachel, S.; Sillero-Zubiri, C.; MacDonald, D. W. (2018). "The unique genetic adaptation of the Himalayan wolf to high-altitudes and consequences for conservation". Global Ecology and Conservation. 16: e00455. doi:10.1016/j.gecco.2018.e00455.
- Alvares, F.; Bogdanowicz, W.; Campbell, L.A.D.; Godinho, R.; Hatlauf, J.; Jhala, Y.V.; Kitchener, A. C.; Koepfli, K.-P.; Krofel, M.; Moehlman, P. D.; Senn, H.; Sillero-Zubiri, C.; Viranta, S.; Werhahn, G. (2019). Old World Canis spp. with taxonomic ambiguity: Workshop conclusions and recommendations, 28th–30th May 2019 (PDF) (Report). Vairão, Portugal: IUCN/SSC Canid Specialist Group, Centro de Investigação em Biodiversidade e Recursos Genéticos. Retrieved 6 March 2020.
- Ersmark, E.; Klütsch, C. F. C.; Chan, Y. L.; Sinding, M.-H. S.; Fain, S. R.; Illarionova, N. A.; Oskarsson, M.; Uhlén, M.; Zhang, Y.-P.; Dalén, L.; Savolainen, P. (2016). "From the Past to the Present: Wolf Phylogeography and Demographic History Based on the Mitochondrial Control Region". Frontiers in Ecology and Evolution. 4. doi:10.3389/fevo.2016.00134. S2CID 19954938.
- Werhahn, G.; Senn, H.; Kaden, J.; Joshi, J.; Bhattarai, S.; Kusi, N.; Sillero-Zubiri, C.; MacDonald, D. W. (2017). "Phylogenetic evidence for the ancient Himalayan wolf: Towards a clarification of its taxonomic status based on genetic sampling from western Nepal". Royal Society Open Science. 4 (6): 170186. Bibcode:2017RSOS....470186W. doi:10.1098/rsos.170186. PMC 5493914. PMID 28680672.
- Koepfli, K.-P.; Pollinger, J.; Godinho, R.; Robinson, J.; Lea, A.; Hendricks, S.; Schweizer, R. M.; Thalmann, O.; Silva, P.; Fan, Z.; Yurchenko, A. A.; Dobrynin, P.; Makunin, A.; Cahill, J. A.; Shapiro, B.; Álvares, F.; Brito, J. C.; Geffen, E.; Leonard, J. A.; Helgen, K. M.; Johnson, W. E.; O'Brien, S. J.; Van Valkenburgh, B.; W., R. K. (2015). "Genome-wide Evidence Reveals that African and Eurasian Golden Jackals Are Distinct Species". Current Biology. 25 (16): 2158–2165. doi:10.1016/j.cub.2015.06.060. PMID 26234211. S2CID 16379927.
- Shrotriya, S.; Lyngdoh, S.; Habib, B. (2012). "Wolves in Trans-Himalayas: 165 years of taxonomic confusion" (PDF). Current Science. 103 (8). Retrieved June 27, 2014.
- Werhahn, G.; Liu, Y.; Meng, Y.; Cheng, C.; Lu, Z.; Atzeni, L.; Deng, Z.; Kun, S.; Shao, X.; Lu, Q.; Joshi, J.; Man Sherchan, A.; Karmacharya, D.; Kumari Chaudhary, H.; Kusi, N.; Weckworth, B.; Kachel, S.; Rosen, T.; Kubanychbekov, Z.; Karimov, K.; Kaden, J.; Ghazali, M.; MacDonald, D. W.; Sillero‐Zubiri, C.; Senn, H. (2020). "Himalayan wolf distribution and admixture based on multiple genetic markers". Journal of Biogeography. 47 (6): 1272–1285. doi:10.1111/jbi.13824.
- Joshi, Bheemdutt; Lyngdoh, Salvador; Singh, Sujeet Kumar; Sharma, Reeta; Kumar, Vinay; Tiwari, Ved Prakash; Dar, S. A.; Maheswari, Aishwarya; Pal, Ranjana; Bashir, Tawqir; Reshamwala, Hussain Saifee; Shrotriya, Shivam; Sathyakumar, S.; Habib, Bilal; Kvist, Laura; Goyal, Surendra Prakash (2020). "Revisiting the Woolly wolf (Canis lupus chanco) phylogeny in Himalaya: Addressing taxonomy, spatial extent and distribution of an ancient lineage in Asia". PLOS ONE. 15 (4): e0231621. Bibcode:2020PLoSO..1531621J. doi:10.1371/journal.pone.0231621. PMC 7162449. PMID 32298359.
- Aggarwal, R. K.; Kivisild, T.; Ramadevi, J.; Singh, L. (2007). "Mitochondrial DNA coding region sequences support the phylogenetic distinction of two Indian wolf species". Journal of Zoological Systematics and Evolutionary Research. 45 (2): 163–172. doi:10.1111/j.1439-0469.2006.00400.x. Note: this is the final, peer-reviewed version of Aggarwal (2003)
- Aggarwal, R. K. (2007). "Molecular Genetic Studies on highly Endangered Species". In Pandit, M. W. S.; Shivaji, L. S. (eds.). You Deserve, We Conserve: A Biotechnological Approach to Wildlife Conservation. New Dehli: I K International Publishing House. pp. 54–57. ISBN 978-81-89866-24-2.
- Mivart, S. G. (1890). "The Common Wolf". Dogs, jackals, wolves, and foxes : a monograph of the Canidæ. London: E. H. Porter and Dulau & Co. p. 8.
- Sclater, P. L. (1874). "On the Black Wolf of Thibet". Proceedings of the Zoological Society of London (November): 654–655.
- Matschie, P. (1907). "Über Chinesische Säugetiere". In Filchner, W. (ed.). Wissenschaftliche Ergebnisse der Expedition Filchner nach China und Tibet, 1903-1905. Berlin: Ernst Siegfried Mittler und Sohn. pp. 134–242.
- Filchner, W. (1913). Wissenschaftliche Ergebnisse der Expedition Filchner nach China und Tibet, 1903–1905 [Scientific results of the expedition Filchner to China and Tibet, 1903–1905]. Band 4. Berlin: Ernst Siegfried Mittler und Sohn.
- Abe, Y. (1923). "Nukutei ni tsuite" [On Nuketei]. Dobutsugaku Zasshi (Zoological Magazine). 35: 320–326.
- Allen, G.M. (1938). "Canis lupus chanco Gray. The Wolf". The Mammals of China and Mongolia. Natural History of Central Asia. XI, Part I (First ed.). New York: The American Museum of Natural History. pp. 342–345.
- Pocock, R. I. (1941). "Canis lupus chanco Gray. The Woolly Wolf". Fauna of British India. Mammals Volume 2. London: Taylor and Francis. pp. 86–90.
- Wozencraft, W.C. (2005). "Subspecies Canis lupus chanco". In Wilson, D.E.; Reeder, D.M (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. p. 576. ISBN 978-0-8018-8221-0. OCLC 62265494.
- Subba, S.A. (2012). Assessing the genetic status, distribution, prey selection and conservation issues of Himalayan wolf (Canis himalayensis) in Trans-Himalayan Dolpa, Nepal (PDF) (Report). Rufford Small Grants Foundation.
- CITES (2009). "Nomenclatural Matters: Twenty-fourth meeting of the Animals Committee Geneva, (Switzerland), 20–24 April 2009, AC24 Doc. 13 Rev. 1 Annex 1" (PDF). p. 3.
- CITES. "Canis lupus". Checklist of CITES species. CITES.
- Sharma, D. K.; Maldonado, J. E.; Jhala, Y. V.; Fleischer, R. C. (2004). "Ancient wolf lineages in India". Proceedings of the Royal Society B: Biological Sciences. 271 (Supplement 3): S1–S4. doi:10.1098/rsbl.2003.0071. PMC 1809981. PMID 15101402.
- Chetri, M.; Jhala, Y.; Jnawali, Shant R.; Subedi, N.; Dhaka l, M.; Yumnam, B. (2016). "Ancient Himalayan wolf (Canis lupus chanco) lineage in Upper Mustang of the Annapurna Conservation Area, Nepal". ZooKeys (582): 143–156. doi:10.3897/zookeys.582.5966. PMC 4857050. PMID 27199590.
- Leonard, J. A.; Vilà, C.; Fox-Dobbs, K.; Koch, P. L.; Wayne, R. K.; Van Valkenburgh, B. (2007). "Megafaunal Extinctions and the Disappearance of a Specialized Wolf Ecomorph" (PDF). Current Biology. 17 (13): 1146–1150. doi:10.1016/j.cub.2007.05.072. PMID 17583509. S2CID 14039133.
- Pilot, M.; Branicki, W.; Jędrzejewski, W.; Goszczyński, J.; Jędrzejewska, B.; Dykyy, I.; Shkvyrya, M.; Tsingarska, E. (2010). "Phylogeographic history of grey wolves in Europe". BMC Evolutionary Biology. 10: 104. doi:10.1186/1471-2148-10-104. PMC 2873414. PMID 20409299.
- Rueness, E. K.; Asmyhr, M. G.; Sillero-Zubiri, C.; MacDonald, D. W.; Bekele, A.; Atickem, A.; Stenseth, N. C. (2011). "The Cryptic African Wolf: Canis aureus lupaster is Not a Golden Jackal and is Not Endemic to Egypt". PLOS ONE. 6 (1): e16385. Bibcode:2011PLoSO...616385R. doi:10.1371/journal.pone.0016385. PMC 3027653. PMID 21298107.
- Miklosi, A. (2015). "Evolution of the Wolf". Dog Behaviour, Evolution, and Cognition. Oxford Biology (2 ed.). Oxford University Press. pp. 106–107. ISBN 978-0199545667.
- Zhao, C.; Zhang, H.; Zhang, J.; Chen, L.; Sha, W.; Yang, X.; Liu, G. (2014). "The complete mitochondrial genome sequence of the Tibetan wolf (Canis lupus laniger)". Mitochondrial DNA. 27 (1): 7–8. doi:10.3109/19401736.2013.865181. PMID 24438245. S2CID 207746075.
- Fan, Z.; Silva, P.; Gronau, I.; Wang, S.; Armero, A. S.; Schweizer, R. M.; Ramirez, O.; Pollinger, J.; Galaverni, M.; Ortega Del-Vecchyo, D.; Du, L.; Zhang, W.; Zhang, Z.; Xing, J.; Vilà, C.; Marques-Bonet, T.; Godinho, R.; Yue, B.; Wayne, R. K. (2016). "Worldwide patterns of genomic variation and admixture in gray wolves". Genome Research. 26 (2): 163–173. doi:10.1101/gr.197517.115. PMC 4728369. PMID 26680994.
- Wang, Guo-Dong; Zhang, Ming; Wang, Xuan; Yang, Melinda A.; Cao, Peng; Liu, Feng; Lu, Heng; Feng, Xiaotian; Skoglund, Pontus; Wang, Lu; Fu, Qiaomei; Zhang, Ya-Ping (2019). "Genomic Approaches Reveal an Endemic Subpopulation of Gray Wolves in Southern China". iScience. 20: 110–118. doi:10.1016/j.isci.2019.09.008. PMC 6817678. PMID 31563851.
- Reece, J. B.; Meyers, N.; Urry, L. A.; Cain, M. L.; Wasserman, S. A.; Minorsky, P. V.; Jackson, R. B. & Cooke, B. N. (2015). "Phylogeny and the tree of life". Campbell Biology Australian and New Zealand version (10 ed.). Australia: Pierson. pp. 561–562. ISBN 9781486007042.
- Miao, B.; Wang, Z.; Li, Y. (2016). "Genomic Analysis Reveals Hypoxia Adaptation in the Tibetan Mastiff by Introgression of the Grey Wolf from the Tibetan Plateau". Molecular Biology and Evolution. 34 (3): 734–743. doi:10.1093/molbev/msw274. PMID 27927792. S2CID 47507546.
- Signore, A. V.; Yang, Y.-Z.; Yang, Q.-Y.; Qin, G.; Moriyama, H.; Ge, R.-L.; Storz, J. F. (2019). "Adaptive Changes in Hemoglobin Function in High-Altitude Tibetan Canids Were Derived via Gene Conversion and Introgression". Molecular Biology and Evolution. 36 (10): 2227–2237. doi:10.1093/molbev/msz097. PMC 6759075. PMID 31362306.
- Wang, Ming-Shan; Wang, Sheng; Li, Yan; Jhala, Yadvendradev; Thakur, Mukesh; Otecko, Newton O.; Si, Jing-Fang; Chen, Hong-Man; Shapiro, Beth; Nielsen, Rasmus; Zhang, Ya-Ping; Wu, Dong-Dong (2020). "Ancient Hybridization with an Unknown Population Facilitated High-Altitude Adaptation of Canids". Molecular Biology and Evolution. 37 (9): 2616–2629. doi:10.1093/molbev/msaa113. PMID 32384152.
- Thalmann, O.; et al. (2013). "Complete Mitochondrial Genomes of Ancient Canids Suggest a European Origin of Domestic Dogs". Science. 342 (6160): 871–4. Bibcode:2013Sci...342..871T. doi:10.1126/science.1243650. PMID 24233726. S2CID 1526260.
- Koblmüller, S.; Vilà, C.; Lorente-Galdos, B.; Dabad, M.; Ramirez, O.; Marques-Bonet, T.; Wayne, R. K.; Leonard, J. A. (2016). "Whole mitochondrial genomes illuminate ancient intercontinental dispersals of grey wolves (Canis lupus)". Journal of Biogeography. 43 (9): 1728–1738. doi:10.1111/jbi.12765.
- Gopalakrishnan, S.; Sinding, M.-H. S.; Ramos-Madrigal, J.; Niemann, J.; Samaniego Castruita, J. A.; Vieira, F. G.; Carøe, C.; Montero, M. d M.; Kuderna, L.; Serres, A.; González-Basallote, V. M.; Liu, Y.-H.; Wang, G.-D.; Marques-Bonet, T.; Mirarab, S.; Fernandes, C.; Gaubert, P.; Koepfli, K.-P.; Budd, J.; Rueness, E. K.; Heide-Jørgensen, M. P.; Petersen, B.; Sicheritz-Ponten, T.; Bachmann, L.; Wiig, Ø.; Hansen, A. J.; Gilbert, M. T. P. (2018). "Interspecific Gene Flow Shaped the Evolution of the Genus Canis". Current Biology. 28 (21): 3441–3449.e5. doi:10.1016/j.cub.2018.08.041. PMC 6224481. PMID 30344120.
- Hodgson, B. H. (1847). "7. Description of the Wild Ass (Asinus polydon) and Wolf of Tibet (Lupus laniger)". Calcutta Journal of Natural History. 7: 469–477.
- Blanford, W. T. (1888). "Canis lupus. The Wolf". The Fauna of British India, Including Ceylon and Burma. Mammalia (First ed.). London: Taylor and Francis. pp. 135–140.
- Lydekker, R. (1900). "The Tibetan Wolf". The great and small game of India, Burma, and Tibet. London: R. Ward. pp. 339–340.
- Jerdon, T. C. (1874). "The Indian wolf". The mammals of India: a natural history of all the animals known to inhabit continental India. London: John Wheldon. pp. 140–141.
- Zhang, W.; Fan, Z.; Han, E.; Hou, R.; Zhang, L.; Galaverni, M.; Liu, H.; Silva, P.; Li, P.; Pollinger, J.P.; Du, L.; Zhang, X.; Yue, B.; Wayne, R.K. & Zhang, Z. (2014). "Hypoxia adaptations in the Grey wolf (Canis lupus chanco) from Qinghai-Tibet Plateau". PLOS Genetics. 10 (7): e1004466. doi:10.1371/journal.pgen.1004466. PMC 4117439. PMID 25078401.CS1 maint: multiple names: authors list (link)
- Wozencraft, W. C. (2008). "Canidae". In Smith, A. T.; Xie, Y. (eds.). A Guide to the Mammals of China (First ed.). Princeton, Oxfordshire: Princeton University Press. pp. 416–418. ISBN 978-0691099842.
- Wang, Y. (2003). A Complete Checklist of Mammal Species and Subspecies in China (A Taxonomic and Geographic Reference). Beijing, China: China Forestry Publishing House. ISBN 978-7503831317.
- Bhattacharya, T. S. (2010). "Sighting of Tibetan Wolf Canis lupus chanko in the Greater Himalayan range of Nanda Devi Biosphere Reserve, Uttarakhand, India: a new record" (PDF). Journal of Threatened Taxa. 2 (12): 1345–1348. doi:10.11609/jott.o2423.1345-8. Archived from the original (PDF) on 2012-11-01.
- "Snow Leopard, Tibetan Wolf sighted". The Pioneer, 15 February 2014.
- Arnold, C. (2016). "Woolly Wolf Spotted in Nepal Is Likely a New Species". National Geographic. Retrieved 29 April 2016.
- Werhahn, G.; Kusi, N.; Sillero-Zubiri, C.; MacDonald, D. W. (2017). "Conservation implications for the Himalayan wolf Canis (lupus) himalayensis based on observations of packs and home sites in Nepal". Oryx. 53 (4): 1–7. doi:10.1017/S0030605317001077.
- Hennelly, L.; Habib, B.; Root-Gutteridge, H.; Palacios, V.; Passilongo, D. (2017). "Howl variation across Himalayan, North African, Indian, and Holarctic wolf clades: tracing divergence in the world's oldest wolf lineages using acoustics". Current Zoology. 63 (3): 341–348. doi:10.1093/cz/zox001. PMC 5804178. PMID 29491993.
- Werhahn, G.; Kusi, N.; Li, X.; Chen, C.; Zhi, L.; Lázaro Martín, R.; Sillero-Zubiri, C.; MacDonald, D. W. (2019). "Himalayan wolf foraging ecology and the importance of wild prey". Global Ecology and Conservation. 20: e00780. doi:10.1016/j.gecco.2019.e00780.
- Lyngdoh, S. B.; Habib, B.; Shrotriya, S. (2019). "Dietary spectrum in Himalayan wolves: comparative analysis of prey choice in conspecifics across high-elevation rangelands of Asia" (PDF). Down to Earth. Retrieved 7 August 2020.
- Namgail, T.; Fox, J.L.; Bhatnagar, Y.V. (2007). "Carnivore-Caused Livestock Mortality in Trans-Himalaya". Environmental Management. 39 (4): 490–496. doi:10.1007/s00267-005-0178-2. PMID 17318699. S2CID 30967502.
- "Species+: Canis lupus". CITES Secretariat and UNEP-WCMC. 2010.
- Habib, B.; Shrotriya, S.; Jhala, Y. V. (2013). "Ecology and Conservation of Himalayan Wolf". Technical Report No. TR – 2013/01. Wildlife Institute of India: 46. doi:10.13140/RG.2.2.36012.87685.
- Ministry of Forests (1973). National Parks and Wildlife Conservation Act 2029 (1973) (PDF). Kathmandu, Nepal: Government of Nepal.
- Xu, Y.; Yang, B.; Dou, L. (2015). "Local villagers' perceptions of wolves in Jiuzhaigou County, western China". PeerJ. 3: e982. doi:10.7717/peerj.982. PMC 4465947. PMID 26082870.
- Fang, H.; Ping, X. (2016). "Red List of China's Vertebrates". Biodiversity Science. 24 (5): 500–551. doi:10.17520/biods.2016076.Canis lupus status=NT (Near Threatened)