In order to protect rice fields, 5 million red-billed weavers have been killed in the Manyara region of Tanzania, according to the Plant Protection and Fertilizer Administration. Red-billed weavers have the ability to destroy over 50 tons of crops in a single day, posing a threat to more than 400 hectares of crops. The organization has used drones and spent four days exterminating the birds, which typically cause damage to crops in Africa during September-October.