GAME rangers last week found the carcasses of 37 white-backed vultures that had been poisoned in the Hluhluwe-iMfolozi nature reserve. The heads of 29 of the birds had been hacked off. He said the death of the birds was a huge setback for the park because white-backed vultures are a threatened species. Ezemvelo KZN said in a statement, from the carcasses that could be identified, three birds were adults, nine were sub-adults and 17 were young. The age of eight birds could not be determined due to their advanced state of decomposition.