Marismas Nacionales

IBA Criteria

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
Black-bellied Whistling-duck Dendrocygna autumnalis LC resident 2012 25,000 individuals A4, B3a
Black Swift Cypseloides niger VU resident 2010 76 individuals A1
Wood Stork Mycteria americana LC resident 2011 3,000 individuals A4, B3a
Reddish Egret Egretta rufescens NT resident 2017 67 individuals B1a
American White Pelican Pelecanus erythrorhynchos LC non-breeding 2017 5,000 individuals A4, B3a
American Avocet Recurvirostra americana LC non-breeding 2017 35,659 individuals A4, B3a
Black-winged Stilt Himantopus himantopus LC resident 2017 12,890 individuals A4, B3a
Semipalmated Plover Charadrius semipalmatus LC non-breeding 2012 2,565 individuals A4, B3a
Wilson's Plover Charadrius wilsonia LC resident 2012 500 individuals A4, B3a
Snowy Plover Charadrius nivosus NT non-breeding 2017 473 individuals A4, B1a, B3a
Marbled Godwit Limosa fedoa LC non-breeding 2017 4,018 individuals A4, B3a
Red Knot Calidris canutus NT winter 2010 2,025 individuals B1a, B3a
Western Sandpiper Calidris mauri LC non-breeding 2011 54,011 individuals A4, B3a
Short-billed Dowitcher Limnodromus griseus LC non-breeding 2018 3,050 individuals A4, B3a
Black Skimmer Rynchops niger LC - 2017 700 individuals B3a
Heermann's Gull Larus heermanni NT resident 2016 452 individuals B1a
Common Gull-billed Tern Gelochelidon nilotica LC breeding 2011 480 individuals B3a
Forster's Tern Sterna forsteri LC winter 2011 7,000 individuals A4, B3a
Elegant Tern Thalasseus elegans NT - 2019 58 individuals B1a
Lilac-crowned Amazon Amazona finschi EN resident 2019 33 individuals A1
Mexican Parrotlet Forpus cyanopygius NT resident 2017 151 individuals B1a
Orange-fronted Parakeet Eupsittula canicularis VU resident 2015 87 individuals A1
Eastern Meadowlark Sturnella magna NT resident 2019 153 individuals B1a
A4iii Species group - seabirds n/a - 2017-2019 130,276 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

IBA Protection

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Marismas Nacionales Ramsar Site, Wetland of International Importance 200,000 protected area contained by site 200,000


IUCN Habitat Habitat detail Extent (% of site)
Wetlands (inland) -
Forest Mangrove -
For further information about the habitat classification please click here.

Land use

Land-use Extent (% of site)
agriculture -
rangeland/pastureland -
forestry -
tourism/recreation -
urban/industrial/transport -
nature conservation and research -
urban/industrial/transport -
other -
For further information about the land use classification please click here.

Land ownership
Tenencia de la tierra: Ejidal, federal y privada.

Recommended citation
BirdLife International (2023) Important Bird Areas factsheet: Marismas Nacionales. Downloaded from on 29/03/2023.