What Happened
- Recent surveys of Wayanad Wildlife Sanctuary, Kerala, reveal a paradox: while the number of active vulture nests has declined — a worrying indicator of breeding success — the overall vulture population has shown a significant increase, rising from 53 individuals in 2024 to 113 in 2025 according to a three-day synchronised vulture census.
- The 2025 census recorded 90 White-rumped Vultures (Gyps bengalensis), 17 Red-headed Vultures (Sarcogyps calvus), and 8 Indian Vultures (Gyps indicus) in the Wayanad forest region.
- Wayanad Wildlife Sanctuary is the only location in Kerala where White-rumped Vultures are known to breed, making it a critical refuge for the species in southern India.
- The nesting decline requires immediate intervention — conservation efforts ongoing in Wayanad include the establishment of a Vulture Safe Zone, engagement with indigenous communities, and veterinary awareness programmes on drug toxicity to vultures.
- The White-rumped Vulture is listed as Critically Endangered on the IUCN Red List — the highest category before extinction in the wild.
Static Topic Bridges
White-rumped Vulture — Species Profile and Conservation Status
The White-rumped Vulture (Gyps bengalensis) is one of the most dramatic conservation stories in recent ecological history — a species that was once among the most numerous large birds on Earth and collapsed to near extinction within a decade due to a single pharmaceutical compound.
- IUCN Red List status: Critically Endangered (listed since 2000, reassessed 2022)
- Population collapse: From an estimated 40 million birds across South Asia in the early 1980s to fewer than 19,000 by 2017 — a decline of over 99.9%
- Distribution (surviving populations): Primarily in the Indo-Gangetic Plains (Uttar Pradesh, Bihar, Jharkhand), parts of Myanmar and Cambodia; highly isolated southern population in Wayanad, Kerala
- Physical characteristics: Medium-large vulture (85-93 cm); distinctive white lower back/rump visible in flight; bare pink head; feeds exclusively on carrion
- Ecological role: Nature's sanitation service — vultures rapidly consume carcasses, preventing the spread of anthrax, tuberculosis, and other diseases; their highly acidic digestive systems (pH ~1) destroy pathogens that would otherwise persist
- Breeding: Colonial nesters on tall trees (Wayanad) or cliff faces; typically one egg per breeding season; slow reproductive rate makes population recovery very slow
- Wayanad significance: Southernmost known breeding colony; critical for genetic diversity of the species
Connection to this news: The population increase (53 to 113 in one year) despite nesting decline suggests that non-breeding birds (sub-adults, migrants from other regions) are congregating in Wayanad, attracted by food availability and a safe environment. However, the nesting decline signals that breeding-age birds are not successfully reproducing — a trend that requires urgent attention before the breeding colony collapses entirely.
Diclofenac and the Veterinary Drug Crisis in Vultures
The vulture population collapse is one of the clearest documented cases of a pharmaceutical compound causing an ecosystem-scale catastrophe. The story is directly relevant to the UPSC theme of "One Health" — the interconnection between human, animal, and environmental health.
- Diclofenac: A Non-Steroidal Anti-Inflammatory Drug (NSAID) widely used to relieve pain and inflammation in livestock (cattle, buffalo, horses); cheap and effective for animals
- Mechanism of harm: Vultures feeding on carcasses of animals that received diclofenac shortly before death absorb the drug; diclofenac causes visceral gout (uric acid crystal deposits on internal organs) and acute kidney failure in vultures within days of ingestion
- Scale of discovery: A 2004 study in Nature by Oaks et al. identified diclofenac as the primary cause of the 99%+ population crash across South Asia (India, Pakistan, Nepal)
- India's response: Veterinary use of diclofenac banned in India in 2006 by the Drug Controller General of India; similarly banned in Nepal (2006) and Pakistan (2010)
- Safe alternative: Meloxicam (another NSAID) — equally effective for livestock but rapidly metabolised and harmless to vultures; Tolfenamic acid and ketoprofen also considered safe alternatives
- Aceclofenac: A newer NSAID introduced for veterinary use in India after the diclofenac ban; studies by RSPB/BirdLife (2011-12) found aceclofenac metabolises to diclofenac in livestock — effectively reintroducing the same problem; aceclofenac also subsequently banned for veterinary use in India
- Ketoprofen: Identified as toxic to vultures; banned for veterinary use in India (2023)
- The Saving Asia's Vultures from Extinction (SAVE) consortium: Multi-country conservation alliance coordinating the recovery effort
Connection to this news: Despite the ban on diclofenac since 2006, vulture nesting decline in Wayanad may indicate residual contamination from veterinary NSAIDs (aceclofenac before its ban, or illegal diclofenac use), habitat loss, or food scarcity. Wayanad's vulture conservation programme specifically trains local veterinarians to use only vulture-safe drugs and monitors carcass dumps to detect ongoing drug exposure.
Protected Area System and Wildlife Conservation Governance
Wayanad Wildlife Sanctuary is part of the Nilgiri Biosphere Reserve — India's first UNESCO Man and Biosphere Reserve. The case illustrates how India's Protected Area (PA) network functions and what governance challenges remain.
- Wayanad Wildlife Sanctuary: Established 1973; area ~344.44 sq km; contiguous with Nagarhole and Bandipur (Karnataka) and Mudumalai (Tamil Nadu) — forming part of the Nilgiri Elephant Reserve (~11,000 sq km total complex)
- Nilgiri Biosphere Reserve: Notified 1986; ~5,520 sq km core zone; UNESCO Man and Biosphere reserve; spans Kerala, Karnataka, Tamil Nadu; home to the largest wild tiger and elephant populations in Asia
- Wildlife Protection Act 1972: Establishes sanctuary/national park classification; Schedules I-VI for species protection; vultures are in Schedule I (highest protection, strongest penalties for harm)
- Vulture Safe Zone (VSZ): A conservation tool where a buffer around a vulture colony is declared a VSZ; veterinarians within the zone are trained and supported to use only vulture-safe drugs; systematic carcass monitoring implemented
- VSZ approach originated in Rajasthan (Jorbeer, Bikaner): India's first formally declared VSZ; expanded to other vulture habitats
- Wayanad Landslide (July 2024): Catastrophic landslide in Wayanad district killed 400+ people; ecological research indicates the landslide zone was within critical wildlife corridors — demonstrating the intersection of human safety and wildlife habitat pressures in the region
Connection to this news: The Wayanad VSZ and engagement with indigenous communities represents the "bottom-up" conservation approach that complements the "top-down" Protected Area legal framework. The Adivasi (tribal) communities in Wayanad have traditional knowledge of vulture habits and nesting sites — their participation is essential for effective monitoring and for the cultural legitimacy of conservation restrictions.
Key Facts & Data
- Species of concern: White-rumped Vulture (Gyps bengalensis)
- IUCN status: Critically Endangered (since 2000)
- Population decline: ~99.9% (40 million birds early 1980s → <19,000 by 2017 across South Asia)
- Wayanad 2024 census: 53 individuals; 2025 census: 113 individuals (90 White-rumped, 17 Red-headed, 8 Indian)
- Location: Wayanad Wildlife Sanctuary (344.44 sq km); only known breeding site for White-rumped Vulture in Kerala
- Diclofenac ban (veterinary): India 2006; aceclofenac ban: India (post-2012); ketoprofen ban: India 2023
- Safe alternative drug: Meloxicam
- Conservation tool: Vulture Safe Zone (VSZ)
- Nilgiri Biosphere Reserve: India's first UNESCO Man and Biosphere Reserve (1986)
- Wildlife Protection Act 1972: Schedule I protection for vultures
- Wayanad Landslide: July 2024 (400+ deaths) — illustrates human-wildlife interface pressure