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There are a number subspecies recognised including the ground nesting Common Cormorant (Phalacrocorax carbo carbo) which occurs in Britain and Ireland that breeds on coastal rocky outcrops and on off shore islands. The tree nesting Continental Cormorant (Phalacrocorax carbo sinensis) which breeds in Northern Europe extending eastwards to Japan, but has in recent times colonised parts of southern Britain. This is apparently a rare subspecies in Ireland with less than 70 records but is in all probability under recorded.
There are three previous Continental Cormorant (P. c. sinensis) records from Co. Dublin:
- Broadmeadow Estuary, Swords, 1st winter from 4th to 30th January 2013.
- Broadmeadow Estuary, Swords, 1st winter from 28th January to 16th May 2013, different from above.
- Scotsman Bay, Dunlaoire, adult on 1st February 2014.
Patrick J. O'Keeffe / Raw Birds
Reference:A List of Some Rarer Birds in Dublin version 5.2 by Joe Hobbs (download pdf here)
Great Cormorant distribution map
breeding resident passage non-breeding
SanoAK: Alexander Kürthy, CC BY-SA 4.0 <https://creativecommons.org/licenses/by-sa/4.0>, via Wikimedia Commons