Phalacrocorax carbo carbo
Common resident. Found on inland waters, autumn to spring. Mathew gives the following breeding stations: Ramsey, Skomer, Lydstep Head (20-30 pairs), at Pointz Castle (where they drove out Herons), and in trees at Slebech.
These still exist but the colonies fluctuate (eg the colony on the Mewstone, Skomer was apparently deserted in 1898 and in 1947). Other colonies: St Margaret’s Island, St Bride’s Stacks, Pwll Deri and Newport Head.