This site encompasses an 8-km estuarine stretch of the River Foyle, with mudflat and saltmarsh habitat and two contiguous river valleys, with wet meadow, arable fields and improved pasture. It is located south of Derry city in Northern Ireland, while its eastern boundary is the County Donegal/Tyrone border. Nearby Lough Foyle, located north of Derry city, is a separate site (site 004).
This is an important site for wintering wildfowl. Species occurring in nationally important numbers include Anas crecca (657 birds, 1995), Bucephala clangula (115 birds, 1996) and Mergus serrator (42 birds, 1996).
BirdLife International (2020) Important Bird Areas factsheet: River Foyle: Carrigans and Swilly Burn valleys. Downloaded from http://www.birdlife.org on 26/10/2020.