Africa is losing its vultures.
South Africa’s national lottery is claiming an unlikely victim: vultures. Local people - convinced these birds’ superb eyesight gives them the gift to see the future - are eating vulture meat to acquire the power of clairvoyance.
And they are not alone. In neighbouring Zimbabwe, voters fearful of supporting the losing side in recent elections ate vulture meat, mainly heads, talons, eyes and hearts, believing this would enable them to pick the winning party. Then there has been the rise of traditional medicines, for which vulture parts are highly valued, as well as soaring cases of poisoning and shootings by starving farmers in East and West Africa.
African vultures are members of the Accipitridae, the Old World Vultures, as opposed to the vultures we find in the Americas, the Cathartidae, or (of course) New World Vultures.
Of the various vulture species found in Africa, only the Lappet-faced and the Cape Griffon are listed as vulnerable by the IUCN Red List, though it appears likely that most of the other African species are at least in decline, with the possible exception of the Palm Nut Vulture, which may be less at risk than the other species thanks to its unique diet.
The vulture populations in India have already collapsed due to the widespread use of the livestock medicine diclofenac, but the drug is not in widespread use in Africa, so it is unlikely to have been much of a factor in the population decline of the various vulture species there.
A measure of this loss is provided by recent surveys which indicate that vulture numbers have dropped by 95 per cent in West Africa. ‘It also appears there has been a similar, drastic reduction in East Africa,’ added Anderson.
‘The situation is catastrophic,’ said Francis Lauginie, of Afrique Nature International. ‘Conservation efforts have to be urgently introduced. This could have irreversible consequences for regional ecosystems and communities.’
The exact causes of the disappearance of the vulture in Africa are unclear. ‘In Asia, diclofenac was responsible,’ said Rondeau. ‘But that is not the case in Africa. It is hardly used there. There seems to be a number of causes. The need for vulture flesh to satisfy markets for traditional medicines, their links with clairvoyance, hunting, and deliberate poisoning are probably all involved.’
Use of the various body parts in traditional medicine may play a role as well, but–aside from the initial anecdote–the article gives no reason to think there has been an up tick in that practice. A 95% drop in observed population is far too steep to be accounted for by even a large upsurge in demand for folk remedies. To kill off 95% of a population, you need a disease, and not just any disease. You need the bird equivalent of Ebola.
During the height of the West Nile hysteria of a couple years ago, the CDC commissioned a study on the effects of the virus on Chicago area crow populations. The death rate among crows not previously exposed to West Nile was quite high.
Whether a similar spatial association between early-season crow deaths and residences of WNV-infected case-patients will be evident in future seasons is unknown, as an estimated 81% of the Chicago-area crow population is thought to have died in 2002.
The problem with West Nile is that, once a population has made it through the initial exposure, death rates plummet, and West Nile Virus has been endemic in Africa for decades. Also, an 81% mortality rate–though quite high–is still quite a step down from 95%.
However, there is another virus deadly enough to account for the steep decline in the African vulture population; the avian flu, which in its more virulent form has a very high mortality indeed.
It spreads very rapidly through poultry flocks, causes disease affecting multiple internal organs, and has a mortality that can approach 100%, often within 48 hours.
Vultures, like crows, are very susceptible to avian flu. As of April, that virus had already made large inroads into the African subcontinent, including areas close tto where vulture drop offs have been observed.

Since then, the virus has appeared in Djibouti and South Africa as well.
Given the extremely poor nature of the public health infrastructure in most of Africa, birds could drop out of the skies like rain and the rest of the world would not know for months, if not years. If avian flu is decimating vultures, one would expect similar mortality rates in other bird populations–especially crows–but population declines in species other than vultures might not be as easily noticed.
If the Hn51 virus is making heretofore unnoticed inroads into Africa, it will soon be endemic in many of the same areas where AIDS is found, giving the virus easy access to an immune-compromised human population, with all that that implies.
AIDS patients are testing grounds for new diseases. Diseases that would otherwise be to weak to resist the human immune system live on in a sufferer from AIDS, which gives them time to evolve defenses and strategies for fighting the immune system.
Up to now, the bird flu virus appears to be less lethal when transmitted by one person to another, but if the virus ever evolves into a form more deadly to humans, it will probably do so in Africa.