The Northern Bald Ibis is one of the world's rarest birds, recovering from near-extinction through intensive conservation including reintroduction programs that use ultralight aircraft to teach migration.
Northern Bald Ibis welfare involves the challenges of conservation interventions that require intensive human management of small wild populations. Ultralight aircraft-led migration — where imprinted birds follow a microlight teaching them migration routes — requires careful management to maintain appropriate relationships with human guides while allowing eventual independent migration. Lead poisoning in wintering areas causes neurological deterioration and death similar to other lead-poisoned raptors and scavengers. Colony protection from disturbance requires sensitive management of human activity around breeding sites. Each individual in this tiny population carries enormous conservation value, making individual welfare decisions more complicated — invasive veterinary intervention for one bird may justify welfare costs that would be disproportionate for a more numerous species.