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The site was identified as internationally important for bird conservation in 2000 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species') at the site:

Species	Red List	Season (year/s of estimate)	Size	IBA criteria
White Stork Ciconia ciconia	LC	breeding (1991)	4 pairs	C6
Black-crowned Night Heron Nycticorax nycticorax	LC	breeding (1991)	80–120 pairs	C6
European Honey-buzzard Pernis apivorus	LC	breeding (1991)	5–50 pairs	C6
Booted Eagle Hieraaetus pennatus	LC	breeding (1991)	5–50 pairs	B2, C6
White-tailed Sea-eagle Haliaeetus albicilla	LC	passage (1991)	1–10 birds	C6
Black Kite Milvus migrans	LC	breeding (1991)	100–500 pairs	B2, C6
Red-backed Shrike Lanius collurio	LC	breeding (1991)	10–100 pairs	C6

Year	Protected Area	Designation (management category)	% coverage of IBA
-	Saint-Martin de Seignanx	Hunting Reserve (-)	5
1991	Barthe de Saint Martin de Seignanx	Arrêté de protection de biotope (IV)	3
2015	Site des carrières de Tercis-les-Bains	Regional Nature Reserve (IV)	<1

Habitat	% of IBA	Habitat detail
Forest	55	Broadleaved deciduous woodland; Mixed woodland; Alluvial and very wet forest
Artificial/Terrestrial	53	Arable land; Perennial crops, orchards and groves
Grassland	40	Humid grasslands
Wetlands (inland)	35	Standing freshwater; Rivers and streams; Raised bogs; Water fringe vegetation

Land use	% of IBA
agriculture	-
fisheries/aquaculture	-
forestry	-
hunting	-
tourism/recreation	-
urban/industrial/transport	-
water management	-
other	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Barthes de l'Adour (France). Downloaded from https://datazone.birdlife.org/site/factsheet/barthes-de-ladour-iba-france on 22/12/2024.