Visitor and Vagrant Seabirds Admitted for Rehabilitation in South Africa, 1993–2017

Seabird species that breed on remote islands in the southern and northern hemispheres are occasionally seen in the continental shelf waters of South Africa. Most are only seen at sea; however, weak, oiled, or injured individuals found on land or on fishing vessels are occasionally admitted to rehabilitation centres. From 1993 to 2017 (25 years), the Southern African Foundation for the Conservation of Coastal Birds (SANCCOB) admitted 297 southern and northern hemisphere remotely-breeding seabirds from 35 species. This represents an average of 12 birds per year, ranging from 0 to 32. The most frequently recorded families were: Procellariidae (198 individuals, 67%), Spheniscidae (29 individuals, 10%), Stercorariidae (22 individuals, 7%), and Diomedeidae (21 individuals, 7%). The three most common species corresponded to the largest Procellariidae species: southern giant petrel ( Macronectes giganteus , 49 individuals, 16%), northern giant petrel ( Macronectes halli , 34 individuals, 11%), and white-chinned petrel ( Procellaria aequinoctialis , 34 individuals, 11%). The majority of birds were admitted due to debilitation (61%) or injury (21%). Of the 185 birds for which the outcome of rehabilitation was recorded, 39% survived to be released back into the wild.