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Year of most recent IBA criteria assessment: 2021

Populations of IBA trigger species

Species	Current IUCN Red List Category	Season	Year(s) of estimate	Population estimate	IBA Criteria Triggered
Red Knot Calidris canutus	NT	non-breeding	2011	7,000 individuals	B1a, B3a
Red Knot Calidris canutus	NT	non-breeding	2018-2020	620 individuals	B1a, B3a
Semipalmated Sandpiper Calidris pusilla	NT	non-breeding	2011	35,000 individuals	A4, B1a, B3a
A4iii Species group - waterbirds	n/a	non-breeding	2011-2018	42,620 individuals	B3b

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
Agricultural expansion and intensification	livestock farming and ranching (includes forest grazing) - small-holder grazing, ranching or farming	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Biological resource use	hunting & collecting terrestrial animals - intentional use (species being assessed is the target)	happening now	some of area/population (10-49%)	slow but significant deterioration	medium

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)
Upaon-Açu/Miritiba/Alto Preguiças	State Environmental Protection Area	1,535,510	protected area overlaps with site	125,493
Rio Pindaré	Terra Indígena	15,002	protected area overlaps with site	0
Reserva Extrativista Quilombo Do Frechal	Reserva Extrativista	9,338	protected area contained by site	0
Reentrancias Maranhenses	Ramsar Site, Wetland of International Importance	2,680,911	protected area is adjacent to site	0
Parque Estadual Do Bacanga	Parque	2,623	protected area overlaps with site	0
Frexal	Extractive Reserve	9,542	protected area contained by site	8,779
Baixada Maranhense Subárea Baixo Mearim	State Environmental Protection Area	374,619	protected area contained by site	1,775,035
Baixada Maranhense Environmental Protection Area	Ramsar Site, Wetland of International Importance	1,775,036	protected area contained by site	1,775,036
Área De Proteção Ambiental Das Reentrâncias Maranhenses	Área de Proteção Ambiental	2,628,504	protected area overlaps with site	0
Área De Proteção Ambiental Da Região Do Maracanã	Área de Proteção Ambiental	2,190	protected area is adjacent to site	0
Área De Proteção Ambiental Da Baixada Maranhense	Área de Proteção Ambiental	1,728,487	protected area overlaps with site	0
Amazon Estuary and its Mangroves	Ramsar Site, Wetland of International Importance	3,830,430	protected area overlaps with site	0

IUCN Habitat	Habitat detail	Extent (% of site)
Coastline	Intertidal mud, sand & salt flats, Salt & brackish marshes	-
Forest	Gallery (or Riparian) forest	-
Wetlands (inland)	Freshwater lakes and pools, Freshwater marshes/swamps, Intertidal mud, sand or salt flats, Riverine floodplains, Salt/brackish marshes	-

For further information about the habitat classification please click here.

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Recommended citation
BirdLife International (2022) Important Bird Areas factsheet: Baixada Maranhense. Downloaded from http://www.birdlife.org on 15/08/2022.