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India's Lost Vultures: A Deadly Toll
18 Sep
Summary
- Vulture decline linked to rising disease and human deaths.
- Diclofenac, a veterinary drug, caused a catastrophic population collapse.
- Half a million additional human deaths estimated between 2000-2005.
For generations, vultures were a common sight in India, efficiently clearing carcasses. However, in the 1990s, their numbers plummeted drastically. The veterinary painkiller diclofenac was identified as the primary culprit, proving fatal to vultures feeding on treated cattle.
This ecological crisis had severe human consequences. A study linked the vulture decline to rising disease rates and an increase in stray dog populations. Between 2000 and 2005, an estimated 500,000 additional human deaths occurred.
With vultures gone, carcasses remained exposed longer, becoming sources of contamination. This led to an increase in feral dogs, which can transmit rabies. Rabies vaccine sales rose, indicating heightened risk.
Furthermore, the decomposition of carcasses allowed pathogens to enter water sources. Faecal bacteria in water more than doubled in affected areas, highlighting the role vultures played in biological waste removal.
India banned veterinary diclofenac in 2006, slowing the decline, but populations have not recovered significantly. Species like the white-rumped vulture have seen declines of approximately 98%.
Several factors now pressure surviving vultures, including other risky veterinary drugs, competition from feral dogs, and habitat destruction from quarrying. Conservation efforts are ongoing to protect these essential birds.
