By one estimate, vultures either residing in or commuting into the Serengeti ecosystem during the annual migration—when 1.3 million white-bearded wildebeests shuffle between Kenya and Tanzania ...

Bearded vultures had been brought back from the brink of extinction through a project involving 120 captive vultures. Is this a success? The bottleneck effect may be a lingering threat for them.

Out of 11 vulture species found in Africa, 7 are on the verge of extinction. In Kenya, one species - bearded vulture - has less than five individuals remaining according to conservationists.