Ringing data and resightings of snowy sheathbills (Chionis albus) from Bird Island, South Georgia, September 2024 to September 2025

This dataset contains ringing data of snowy sheathbills (Chionis albus) captured, ringed and released on Bird Island, South Georgia from September 2024 to September 2025, as well as subsequent resightings of birds throughout the year. Ringing data includes summary morphometrics including size and weight measurements. Resightings were made on an ad-hoc basis but represent high effort throughout the year. Data were collected as part of an initial study of sheathbills at Bird Island, aiming to discern population structure, comparative morphometrics with Antarctic birds, and for sexing via discriminant functions. Data were collected by Bird Island Zoological Field Assistants. Funded as part of the BAS Bird Island Long-term Monitoring Programme.