• Summary
• Text account
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• Reference and further resources

The site was identified as important in 2002 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 List1	Season	Year(s)	Size	IBA criteria
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	NT	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	min 20,000 individuals	A4iii, C4

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2002) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2002. The most recent assessment (2005) is shown below.

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Transportation and service corridors	happening now	small area/few individuals (<10%)	very rapid to severe deterioration	low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Not assessed	Not assessed	Not assessed	not assessed

Year	Protected Area	Designation	% overlap with IBA
1979	Dunas de São Jacinto	Reserva Natural	1
1990	Ria de Aveiro	Special Protection Area (Birds Directive)	100
2012	Pateira de Fermentelos Lake and Águeda and Cértima Valleys	Ramsar Site, Wetland of International Importance	3
2014	Ria de Aveiro	Site of Community Importance (Habitats Directive)	62

Habitat1	Habitat detail	% of IBA
Marine Neritic		29
Artificial/Terrestrial	Arable land	13
Grassland	Humid grasslands	10
Forest	Native coniferous woodland, Alluvial and very wet forest	4
Marine Coastal/Supratidal		major (>10)
Marine Intertidal		major (>10)

1. IUCN Habitat classification.

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

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Ria de Aveiro (Portugal). Downloaded from https://datazone.birdlife.org/site/factsheet/ria-de-aveiro-iba-portugal on 23/11/2024.