Complejo Lagunar San Ignacio

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
Brent Goose Branta bernicla LC winter 2020 2,200 individuals B3a
Ridgway's Rail Rallus obsoletus NT resident 2020 45 individuals B1a
Reddish Egret Egretta rufescens NT resident 2011 597 individuals A4, B1a, B3a
Brown Pelican Pelecanus occidentalis LC winter 2011 5,000 individuals A4, B3a
Brandt's Cormorant Urile penicillatus LC - 2020 2,800 individuals A4, B3a
Snowy Plover Charadrius nivosus NT resident 2018 129 individuals B1a, B3a
Long-billed Curlew Numenius americanus LC non-breeding 2017 2,054 individuals A4, B3a
Marbled Godwit Limosa fedoa LC non-breeding 2020 23,836 individuals A4, B3a
Short-billed Dowitcher Limnodromus griseus LC winter 2020 1,000 individuals B3a
Willet Tringa semipalmata LC non-breeding 2020 6,643 individuals A4, B3a
Heermann's Gull Larus heermanni NT resident 2013 1,108 individuals B1a
Elegant Tern Thalasseus elegans NT - 2013 300 individuals B1a
Royal Tern Thalasseus maximus LC resident 2018 300 individuals B3a
A4iii Species group - waterbirds n/a - 2017-2020 35,333 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)
Whale Sanctuary of El Vizcaino World Heritage Site (natural or mixed) 370,950 protected area overlaps with site 0
Laguna San Ignacio Ramsar Site, Wetland of International Importance 17,500 protected area overlaps with site 0
El Vizcaíno UNESCO-MAB Biosphere Reserve 2,546,790 protected area contains site 0
El Vizcaíno Reserva de la Biosfera 2,198,617 protected area overlaps with site 107,626


IUCN Habitat Habitat detail Extent (% of site)
Forest Mangrove -
Shrubland Scrub -
Unknown -
Coastline Sand dunes & beaches -
Wetlands (inland) Saline & alkaline lakes -
Other -
For further information about the habitat classification please click here.

Land use

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

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

Recommended citation
BirdLife International (2023) Important Bird Areas factsheet: Complejo Lagunar San Ignacio. Downloaded from on 28/01/2023.