SPA description
(information as published 2001)

Ynys Seiriol / Puffin Island

image: SPA location map 


Ynys Seiriol / Puffin Island is located just off the eastern tip of the Isle of Anglesey in North Wales. It is a Carboniferous limestone block rising to 55 m with steep cliffs on all sides. A veneer of heavily guano-enriched soil masks the limestone over much of the surface, leading to an impoverished vegetation dominated by a dense mat of grasses (mainly Red Fescue Festuca rubra and Cock's-foot Dactylis glomerata), Common Nettle Urtica dioica, Bramble Rubus fruticosus and Alexanders Smyrnium olusatrum. It was heavily grazed by rabbits until the advent of myxomatosis. Dense woodland of Elder Sambucus nigra has developed, particularly in the past 40 years since the loss of rabbit grazing. The island has long been unoccupied. A large population of Common Rat Rattus norvegicus appears to have been eradicated by poisoning undertaken in 1998 to enhance its value for breeding seabirds. The site is of European importance for its breeding population of Cormorant Phalacrocorax carbo, which feed in the surrounding waters outside the SPA. 

Qualifying species

For individual species accounts visit the Species Accounts section

This site qualifies under Article 4.2 of the Directive (79/409/EEC) by supporting populations of European importance of the following migratory species:
During the breeding season;
Cormorant Phalacrocorax carbo, 776 pairs representing at least 1.9% of the breeding Northwestern Europe population (count as at 1996)



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