Pre 1950 Furness has reported that they bred irregularly on the island,
since then there have been a couple of breeding attempts, one successful, in
1959.
Generally the first birds are seen in March/April. These birds are
presumed to have wintered. Numbers occasionally increase to four or five birds
into May and June.
Single figures of returning birds are seen from August into October/November.
The highest count to date, was twelve birds on