This decrease of between 36 and 40 percent has seen them move from the status of ‘Least Concern’ to ‘Vulnerable’ on the IUCN’s ‘Red List’ which monitors the conservation status of species.
Factors including a growing human population, expanding industries including mining, illegal hunting and civil unrest are all credited with contributing to their demise.
“In these war torn areas, in northern Kenya, Somalia, and Ethiopia in the border area with South Sudan, essentially the giraffes are war fodder, a large animal, extremely curious that can feed a lot of people,” Dr Julian Fennessy from the IUCN told BBC.
“The species in southern Africa, those numbers are increasing by two to three times over the last three decades,” Fennessy said. “But when you come up through East Africa, those numbers have plummeted some by up to 95 percent of the population in the case of the Nubian giraffe, in the last three decades alone.”
Fennessy added that people “are unaware that these majestic animals are undergoing a silent extinction.”
Of the subspecies of giraffe, three have increased in population, five decreased, and one showed no change, according to the IUCN. They now move into a higher-priority category on the organization’s ‘Red List’ alongside several species of birds, freshwater fish and crops including four mango species.