County Down, Ulster, Northern Ireland, Ireland, United Kingdom.
The Observatory lies off the County Down coast of Northern Ireland at the southern side of the mouth of Belfast Lough. It is one of the British Bird Observatories and is directed and serviced by the British Trust for Ornithology. Its main aim is the collection of data on migratory and breeding birds, which may be used for their general conservation. It is operated on a part-time basis by local amateur ornithologists.