• 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
Western Grebe Aechmophorus occidentalis	LC	winter	2011	1,800 individuals	A4, B3a
American White Pelican Pelecanus erythrorhynchos	LC	winter	2011	3,000 individuals	A4, B3a
Snowy Plover Charadrius nivosus	NT	winter	2013	56 individuals	B1a, B3a
Long-billed Curlew Numenius americanus	LC	winter	2017	3,370 individuals	A4, B3a
Marbled Godwit Limosa fedoa	VU	winter	2017	10,906 individuals	A4, B3a
Western Sandpiper Calidris mauri	LC	-	2017	55,118 individuals	A4, B3a
Willet Tringa semipalmata	LC	winter	2017-2018	6,880 individuals	A4, B3a
Black Skimmer Rynchops niger	LC	non-breeding	2010	950 individuals	B3a
Yellow-footed Gull Larus livens	LC	winter	2011	630 individuals	A4, B3a
Common Gull-billed Tern Gelochelidon nilotica	LC	resident	2010	250 individuals	B3a
Elegant Tern Thalasseus elegans	NT	non-breeding	2010	3,000 individuals	A4, B1a, B3a
Royal Tern Thalasseus maximus	LC	breeding	2011	800 individuals	B3a
A4iii Species group - waterbirds	n/a	-	2010-2017	79,274 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
1993	Alto Golfo de California y Delta del Río Colorado	Reserva de la Biosfera	100
1995	Alto Golfo de California y El Pinacate	UNESCO-MAB Biosphere Reserve	100
1995	Islas del Golfo de California	UNESCO-MAB Biosphere Reserve	12
1996	Humedales del Delta del Río Colorado	Ramsar Site, Wetland of International Importance	100
2000	Islas del Golfo de California	Área de Protección de Flora y Fauna	12
2005	Islands and Protected Areas of the Gulf of California	World Heritage Site (natural or mixed)	100

Habitat1	Habitat detail	% of IBA
Unknown		73
Wetlands (inland)	Freshwater lakes & pools, Rivers	19
Other		6

1. IUCN Habitat classification.

Land use	% of IBA
agriculture	minor (<10)
other	-

Tenencia de la tierra: Ejidal, privada y concesión.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Delta del Río Colorado (Mexico). Downloaded from https://datazone.birdlife.org/site/factsheet/delta-del-río-colorado-iba-mexico on 23/11/2024.