The principal responsibility of the Bird Warden is to maintain all requirements of the Bird Observatory work, achieving daily census coverage and recording of bird populations, maintaining a programme of bird ringing and ensuring safe storage and dissemination of data. Ensure continued participation in established colour-ringing and tagging projects and monitoring of breeding bird numbers through species specific surveys and participation in the BTO nest record scheme and more local studies such as the Manx Shearwater recovery project.

The Calf of Man is owned by Manx National Heritage and MWT manage the wardens on their behalf.