First documented case of flunixin residue in a Himalayan Vulture Gyps himalayensis Hume, 1869 (Aves: Accipitriformes: Accipitridae) in India: conservation and veterinary implications
DOI:
https://doi.org/10.11609/jott.9714.17.9.27517-27522Keywords:
Buxa Vulture Conservation Breeding Centre and Aviary, non-steroidal anti-inflammatory drugs (NSAIDs), renal failure, veterinary pharmaceuticals, visceral gout, vulture conservation, Ajodhya Hills, Chota Nagpur Plateau, Jangalmahal, Orchids, Purulia, West Bengal, India, wildlife toxicologyAbstract
Non-steroidal anti-inflammatory drugs (NSAID), particularly diclofenac, have been widely identified as a major cause of vulture deaths across Asia, leading to significant population declines. The impact of other veterinary NSAIDs, including flunixin, remains poorly documented. This study reports the first confirmed case of flunixin residue in a wild Himalayan Vulture Gyps himalayensis (Hume, 1869) in India. A juvenile vulture was rescued from Jaldapara National Park, West Bengal, and transferred to the Buxa Vulture Conservation Breeding Centre & Aviary at Rajabhatkhawa (West Bengal) for treatment and rehabilitation. Despite medical intervention, the bird died. Necropsy revealed extensive visceral gout, indicative of renal failure. Toxicological analysis confirmed the presence of flunixin residues in the tissues (stomach contents showed the highest level of flunixin with 903.9 ng/g, followed by the kidney with 214.3 ng/g, and the liver with 67.6 ng/g). This report highlights the requirement for careful monitoring of veterinary NSAID usage in India by trained professionals for the conservation of endangered vulture populations.
References
Ali, S., & S.D. Ripley (1978). Handbook of the birds of India and Pakistan: Together with those of Bangladesh, Nepal, Bhutan and Sri Lanka, Vol. 1. Oxford University Press, London, New York, 382pp.
BirdLife International (2021). Gyps himalayensis. In: IUCN 2021. 2021 IUCN Red List of Threatened Species. e.T22695215A204643889. Accessed on 24.ii.2025. https://doi.org/10.2305/IUCN.UK.2021-3.RLTS.T22695215A204643889.en.
BirdLife International (2024). Species factsheet: Himalayan Griffon Gyps himalayensis. In: BirdLife 2024. Accessed on 24.ii.2025. https://datazone.birdlife.org/species/factsheet/himalayan-griffon-gyps-himalayensis
Chakraborty, S.S., D. Ray, A. Sen, P.J. Harikrishnan, N.K. Jha & R. Ghosh (2024). Indian Leopard predation on the sub-adult Himalayan Griffon Vulture. Journal of Threatened Taxa 16(11): 26104–26109. https://doi.org/10.11609/jott.9255.16.11.26104-26109
Cuthbert, R., J. Parry-Jones, R.E. Green & D.J. Pain (2007). NSAIDs and scavenging birds: Potential impacts beyond Asia’s critically endangered vultures. Biology Letters 3(1): 91–94. https://doi.org/10.1098/rsbl.2006.0554
Cuthbert, R.J., R. Dave, S.S. Chakraborty, S. Kumar, S. Prakash, S.P. Ranade & V. Prakash (2011). Assessing the ongoing threat from veterinary non-steroidal anti-inflammatory drugs to Critically Endangered Gyps vultures in India. Oryx 45(3): 328–333. https://doi.org/10.1017/S0030605311000135
Down To Earth (2022). Tamil Nadu prosecutes 104 manufacturers, sellers of multi-dose diclofenac linked with vulture deaths. Down To Earth, 19 April 2022. https://www.downtoearth.org.in/wildlife-biodiversity/tamil-nadu-prosecutes-104 manufacturers-sellers-of-multi-dose-diclofenac-linked-with-vulture-deaths-82455.
Galligan, T.H., J.W. Mallord, V.M. Prakash, K.P. Bhusal, A.S. Alam & F.M. Anthony (2020). Trends in the availability of the vulture-toxic drug, diclofenac, and other NSAIDs in South Asia, as revealed by covert pharmacy surveys. Bird Conservation International 31(3): 337–353. https://doi.org/10.1017/S0959270920000477
Government of India (2022). The Wild Life (Protection) Amendment Act, 2022. In: The Gazette of India. Ministry of Law and Justice (Legislative Department). Accessed on 24.ii.2025. https://www.indiacode.nic.in/handle/123456789/1726
Ministry of Health and Family Welfare, Government of India (2008). Prohibition of manufacture, sale and distribution of Diclofenac and its formulations for animal use. The Gazette of India: Extraordinary, Part II—Section 3(ii), Sub-section (i), G.S.R. 499(E), 4 July 2008.
Ministry of Health and Family Welfare, Government of India (2023). Prohibition of manufacture, sale and distribution of Ketoprofen and Aceclofenac and their formulations for animal use. The Gazette of India: Extraordinary, Part II—Section 3, Sub-section (ii), S.O. 3448(E), 31 July 2023. [F. No. X.11035/65/2023-DRS].
Ministry of Health and Family Welfare, Government of India (2024). Prohibition of manufacture, sale and distribution of Nimesulide and its formulations for animal use. The Gazette of India: Extraordinary, Part II—Section 3(ii), S.O. 5633(E), 30 December. [F. No. X.11035/100/2024-DRS].
Naoroji, R. (2006). Birds of Prey of the Indian Subcontinent. Om Books International, New Delhi, 692 pp.
Naidoo, V. & G.E. Swan (2009). Diclofenac toxicity in Gyps vultures is associated with decreased uric acid excretion and not renal portal vasoconstriction. Comparative Biochemistry and Physiology Part C: Toxicology & Pharmacology 149(3): 269–274. https://doi.org/10.1016/j.cbpc.2008.07.014
Oaks J.L., M. Gilbert, M.Z. Virani, R.T. Watson, C.U. Meteyer, B.A. Rideout, H.L. Shivaprasad, S. Ahmed, M.J.I. Chaudhry, M. Arshad & S. Mahmood (2004). Diclofenac residues as the cause of vulture population decline in Pakistan. Nature 427(6975): 630–633. https://doi.org/10.1038/nature02317
Pain, D.J., A.A. Cunningham, P.F. Donald, J.W. Duckworth, D.C. Houston, T. Katzner, J. Parry-Jones, C. Poole, V. Prakash, P. Round & R. Timmins (2008). The race to prevent the extinction of South Asian vultures. Bird Conservation International 18(S1): S30–S48. https://doi.org/10.1017/S0959270908000324
Rasmussen, P.C. & J.C. Anderton (2012). Birds of South Asia: The Ripley Guide,2nd edition, Vol. 1 & 2. Smithsonian Institution, Michigan State University & Lynx Editions, Washington, DC, Michigan & Barcelona, pp. 1–378 & pp. 1–683.
Ramzan, M., M. Ashraf & K.T. Mahmood (2012). Toxicity of flunixin meglumine in broiler chickens. Journal of Pharmaceutical Sciences and Research 4: 1748–1754.
Yong, D.L. & C. Kasorndorkbua (2008). The status of the Himalayan Griffon Gyps himalayensis in South-East Asia. Forktail 24: 57–62.
Zorrilla, I., R. Martinez, M.A. Taggart & N. Richards (2014). Suspected flunixin poisoning of a wild Eurasian Griffon Vulture from Spain. Conservation Biology 29(2): 587–592. https://doi.org/10.1111/cobi.12417
Published
Issue
Section
License
Copyright (c) 2025 Soumya Sundar Chakraborty, Debal Ray, Apurba Sen, P.J. Harikrishnan, Nabi Kanta Jha, Rounaq Ghosh

This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors own the copyright to the articles published in JoTT. This is indicated explicitly in each publication. The authors grant permission to the publisher Wildlife Information Liaison Development (WILD) Society to publish the article in the Journal of Threatened Taxa. The authors recognize WILD as the original publisher, and to sell hard copies of the Journal and article to any buyer. JoTT is registered under the Creative Commons Attribution 4.0 International License (CC BY), which allows authors to retain copyright ownership. Under this license the authors allow anyone to download, cite, use the data, modify, reprint, copy and distribute provided the authors and source of publication are credited through appropriate citations (e.g., Son et al. (2016). Bats (Mammalia: Chiroptera) of the southeastern Truong Son Mountains, Quang Ngai Province, Vietnam. Journal of Threatened Taxa 8(7): 8953–8969. https://doi.org/10.11609/jott.2785.8.7.8953-8969). Users of the data do not require specific permission from the authors or the publisher.





