A dead goose has tested positive for the highly virulent H5N1 strain of bird flu, government scientists have said.
Regular patrols are being mounted in the area for dead birds
The remains of the bird were discovered around 1km (0.6m) from Abbotsbury Swannery in Dorset, where a number of swans have been found with the disease.
The Department for the Environment, Food and Rural Affairs said the Canada goose was the eleventh wild bird in the area to test positive for H5N1.
Restrictions on the movement of poultry have now been introduced in the area.
Defra said the decision was based on veterinary advice. Poultry keepers will not be able to move birds from their premises except under licence.
A spokeswoman said that the latest case of bird flu was "not unexpected".
She said H5N1 was active at a very low level among wild birds in the area, and there was no evidence of the virus in domestic poultry locally.
Regular surveillance was continuing, she added, with patrols looking for dead birds.
Poultry movements are restricted in a zone around Abbotsbury Swannery
A Wild Bird Monitoring Area is in place around the affected area, with keepers required to keep domestic poultry away from wild birds.
Owners have been urged to stay vigilant and report any signs of the disease.
Since 10 January, H5N1 has been identified in 10 mute swans in the area - with the last case confirmed on February 4.
Abbotsbury Swannery, near Chesil Beach, is part of an area of wetland recognised to be of international importance.