Dropping dead: causes and consequences of vulture population declines worldwide

@article{Ogada2012DroppingDC,
  title={Dropping dead: causes and consequences of vulture population declines worldwide},
  author={Darcy L. Ogada and Felicia Keesing and Munir Z. Virani},
  journal={Annals of the New York Academy of Sciences},
  year={2012},
  volume={1249}
}
Vultures are nature's most successful scavengers, and they provide an array of ecological, economic, and cultural services. As the only known obligate scavengers, vultures are uniquely adapted to a scavenging lifestyle. Vultures’ unique adaptations include soaring flight, keen eyesight, and extremely low pH levels in their stomachs. Presently, 14 of 23 (61%) vulture species worldwide are threatened with extinction, and the most rapid declines have occurred in the vulture‐rich regions of Asia… 
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References

SHOWING 1-10 OF 189 REFERENCES
Rapid population declines of Egyptian vulture (Neophron percnopterus) and red‐headed vulture (Sarcogyps calvus) in India
TLDR
Analysis of repeated surveys in and near protected areas widely spread across India shows that populations of two other vulture species, Egyptian vulture Neophron percnopterus and red-headed vulture Sarcogyps calvus, have also declined markedly and rapidly, but probably with a later onset than Gyps vultures in the same region.
The race to prevent the extinction of South Asian vultures
TLDR
It may be some years before diclofenac is removed from the vultures' food supply, and captive populations of three vulture species have been established to provide sources of birds for future reintroduction programmes.
Historical and current status of vultures in Myanmar
Summary Concerns for the long-term survival of vulture populations on the Indian Subcontinent, owing to widespread poisoning by the veterinary drug diclofenac, have led to increased conservation
Large declines of the Hooded Vulture Necrosyrtes monachus across its African range
The Hooded Vulture Necrosyrtes monachus is not currently listed on the IUCN Red List of threatened species, yet recent email discussions amongst a group of African raptor experts suggests this
The role of griffon vultures Gyps africanus and Gyps ruppellii as scavengers
TLDR
In the Serengeti, predator kills formed from 8 to 45 % of the carcasses that griffon vultures fed upon, the remaining carcasses coming from animals that had died from other causes, so these vulture exploit a basically different food supply from predators and probably evolved as scavengers of migratory ungulate populations.
Effects of Vulture Declines on Facultative Scavengers and Potential Implications for Mammalian Disease Transmission
TLDR
The role of vultures in carcass decomposition and level of contact among mammalian scavengers is highlighted, leading to hypothesize that changes in vulture abundance may affect patterns of disease transmission among mammalian carnivores.
Sources of variation in mortality of the Bearded Vulture Gypaetus barbatus in Europe
TLDR
The results suggest that human persecution continues to be the main factor contributing to unnatural mortality for European Bearded Vultures, with substantial differences between causes of mortality recorded for birds located by chance and radio-tagged birds.
Rapid population declines and mortality clusters in three Oriental white-backed vulture Gyps bengalensis colonies in Pakistan due to diclofenac poisoning
TLDR
With populations declining by approximately 50% annually, the long term survival of Gyps vultures in South Asia will require the removal of diclofenac from vulture food and establishment of captive populations for future restoration once the environment is free from contamination.
Are Vultures Birds, and Do Snakes Have Venom, because of Macro- and Microscavenger Conflict?
TLDR
It is suggested that the most efficient macroscavenger adaptations increase the probability of carcass detection, which explains why highly vagile species, such as vultures, are the most obligate of vertebrate scavengers.
Diclofenac residues as the cause of vulture population decline in Pakistan
TLDR
Results are provided that directly correlate residues of the anti-inflammatory drug diclofenac with renal failure and renal failure in the Oriental white-backed vulture (OWBV) and it is proposed that residues of veterinary diclotenac are responsible for the OWBV decline.
...
1
2
3
4
5
...