The Bulletin is a quarterly publication consisting of major articles based on original studies of birds and short communications that describe observations of particular interest. Each issue also ...

A recent survey has found a high concentration of near-extinct helmeted hornbills in a conservation area in western Borneo. This “hornbill paradise” is currently not included in the IUCN range map for ...

A new study combines over 30 years of demanding fieldwork and advanced genetics to quantify how much harm is done by inbreeding in the last wild population of the helmeted honeyeater, and identifies ...