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

The site was identified as important in 2021 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
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	resident	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	VU	non-breeding	2020	23,836 individuals	A4, B3a
Short-billed Dowitcher Limnodromus griseus	VU	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	non-breeding	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

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2021) may differ.

Year	Protected Area	Designation	% overlap with IBA
1988	El Vizcaíno	Reserva de la Biosfera	100
1993	El Vizcaíno	UNESCO-MAB Biosphere Reserve	100
1993	Whale Sanctuary of El Vizcaino	World Heritage Site (natural or mixed)	55
2004	Laguna San Ignacio	Ramsar Site, Wetland of International Importance	73

Habitat1	Habitat detail	% of IBA
Marine Coastal/Supratidal		91
Forest	Mangrove	5
Shrubland	Scrub	1
Marine Intertidal		minor (<10)

1. IUCN Habitat classification.

Land use	% of IBA
nature conservation and research	100
fisheries/aquaculture	100
tourism/recreation	5
urban/industrial/transport	minor (<10)

Tenencia de la tierra: Ejidal, privada y federal.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Complejo Lagunar San Ignacio (Mexico). Downloaded from https://datazone.birdlife.org/site/factsheet/complejo-lagunar-san-ignacio-iba-mexico on 22/11/2024.