• Summary
• Text account
• Data table and detailed info
• Map
• Reference and further resources

Year of most recent IBA criteria assessment: 2002

Populations of IBA trigger species

Species	Current IUCN Red List Category	Season	Year(s) of estimate	Population estimate	IBA Criteria Triggered
Common Little Bittern Ixobrychus minutus	LC	breeding	-	frequent	C6
Purple Heron Ardea purpurea	LC	breeding	2002	150-200 breeding pairs	B2, C6
Pied Avocet Recurvirostra avosetta	LC	winter	2002	800-1,800 individuals	A4i, B1i, B2, C2, C6
Black-winged Stilt Himantopus himantopus	LC	breeding	1996	50-100 breeding pairs	C6
Common Ringed Plover Charadrius hiaticula	LC	winter	2002	800-1,800 individuals	A4i, B1i
Kentish Plover Charadrius alexandrinus	LC	breeding	1995	common	B3
Kentish Plover Charadrius alexandrinus	LC	winter	2002	660-6,000 individuals	A4i, B1i, C3
Dunlin Calidris alpina	LC	winter	2002	7,800-10,700 individuals	B3, C3
Little Tern Sternula albifrons	LC	breeding	1996	10-15 breeding pairs	C6
Western Marsh-harrier Circus aeruginosus	LC	resident	1999	13 breeding pairs	C6
A4iii Species group - waterbirds	n/a	winter	2002	20,000 individuals	A4iii, C4

Note: This table presents the IBA criteria triggered and the species that triggered then at the time of assessment, the current IUCN Red List category may vary from that which was in place at that time.

For more information about the IBA assessment process and criteria please click here

Threats to the site (pressure)
Threat Level 1	Threat Level 2	Timing	Scope	Severity	Result
Transportation and service corridors	utility & service lines	happening now	small area/few individuals (<10%)	very rapid to severe deterioration	low

Conservation actions taken at site (response)
Conservation Designation	Management Planning	Conservation Action	Result
Not assessed	Not assessed	Not assessed	not assessed

For more information about IBA monitoring please click here

Protected Area	Designation	Area (ha)	Relationship with IBA	Overlap with IBA (ha)
Ria de Aveiro	Special Protection Area (Birds Directive)	51,446	protected area overlaps with site	51,378
Ria de Aveiro	Site of Community Importance (Habitats Directive)	33,127	protected area overlaps with site	0
Pateira de Fermentelos Lake and Águeda and Cértima Valleys	Ramsar Site, Wetland of International Importance	1,559	protected area overlaps with site	0
Dunas de São Jacinto	Reserva Natural	996	protected area contained by site	681
Dunas de Mira; Gândara e Gafanhas	Site of Community Importance (Habitats Directive)	20,529	protected area is adjacent to site	0
Aveiro/ Nazaré	Special Protection Area (Birds Directive)	292,929	protected area is adjacent to site	0

IUCN Habitat	Habitat detail	Extent (% of site)
Forest	Native coniferous woodland, Alluvial and very wet forest	-
Grassland	Humid grasslands	-
Wetlands (inland)	Water fringe vegetation	-
Sea	Open Sea	-
Artificial/Terrestrial	Arable land	-
Coastline	Tidal rivers & enclosed tidal waters, Sand dunes & beaches, Salt marshes, Mud flats & sand flats, Lagoons	-
Marine Neritic		-
Marine Intertidal		-
Marine Coastal/Supratidal		-

For further information about the habitat classification please click here.

Land-use	Extent (% of site)
agriculture	-
fisheries/aquaculture	-
forestry	-
hunting	-
military	-
nature conservation and research	-
tourism/recreation	-
urban/industrial/transport	-

For further information about the land use classification please click here.

---

Recommended citation
BirdLife International (2023) Important Bird Areas factsheet: Ria de Aveiro. Downloaded from http://www.birdlife.org on 25/03/2023.