Sooty Tern | Caspian Tern | Arctic Tern | White Tern | Fairy Tern | tern | Sandwich Tern | Common Tern | Antarctic Tern | Tern | Royal Tern | River Tern | Little Tern | South American Tern | sooty tern | New Zealand Fairy Tern | Little White Tern | Least Tern | Large-billed Tern | Forster's Tern | Damara Tern | Common tern | California Least Tern | Black-fronted Tern |
The islands are important for their tern colony, in particular for Roseate Tern, for which this is the most regular breeding site on Anglesey, although numbers of breeding pairs are low currently (2005) compared with the past.