Gull-billed Tern, Blennerville, 26th October 2015 (Aidan Kelly).
Gull-billed Tern, Blennerville, 26th October 2015 (Ed Carty).
Gull-billed Tern, Blennerville, 26th October 2015 (Aidan Kelly).
Gull-billed Tern, Blennerville, 26th October 2015 (Ed Carty).
Gull-billed Tern, Blennerville, 26th October 2015 (Aidan Kelly).
Gull-billed Tern, Blennerville, 26th October 2015 (Aidan Kelly).
Eider, Fenit, 26th October 2015 (Céit Ní Dhomhnaill).
This is almost certainly the same bird as seen at Rough Point and the Magharees, on and off, from April to June of this year (see, e.g. this post HERE, and pics below). The orange bill prompted thoughts that it might be of the Arctic race borealis. More on this soon.
The same bird, but back in early June 2015. Eider, Rough Point, 26th October 2015 (Michael O'Clery).
And another from early June 2015. Rough Point, 26th October 2015 (Michael O'Clery).