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The site was identified as internationally important for bird conservation 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 List	Season (year/s of estimate)	Size	IBA criteria
Western Grebe Aechmophorus occidentalis	LC	winter (2011)	1,800 birds	A4, B3a
American White Pelican Pelecanus erythrorhynchos	LC	winter (2011)	3,000 birds	A4, B3a
Snowy Plover Charadrius nivosus	NT	winter (2013)	56 birds	B1a, B3a
Long-billed Curlew Numenius americanus	LC	winter (2017)	3,370 birds	A4, B3a
Marbled Godwit Limosa fedoa	VU	winter (2017)	10,906 birds	A4, B3a
Western Sandpiper Calidris mauri	LC	- (2017)	55,118 birds	A4, B3a
Willet Tringa semipalmata	LC	winter (2017–2018)	6,880 birds	A4, B3a
Black Skimmer Rynchops niger	LC	non-breeding (2010)	950 birds	B3a
Yellow-footed Gull Larus livens	LC	winter (2011)	630 birds	A4, B3a
Common Gull-billed Tern Gelochelidon nilotica	LC	resident (2010)	250 birds	B3a
Elegant Tern Thalasseus elegans	NT	non-breeding (2010)	3,000 birds	A4, B1a, B3a
Royal Tern Thalasseus maximus	LC	breeding (2011)	800 birds	B3a
A4iii Species group - waterbirds	n/a	- (2010–2017)	79,274 birds	B3b

Year	Protected Area	Designation (management category)	% coverage of IBA
1993	Alto Golfo de California y Delta del Río Colorado	Reserva de la Biosfera (Ia)	100
1995	Alto Golfo de California y El Pinacate	UNESCO-MAB Biosphere Reserve (UA)	100
1995	Islas del Golfo de California	UNESCO-MAB Biosphere Reserve (UA)	12
2000	Islas del Golfo de California	Área de Protección de Flora y Fauna (VI)	12
2005	Islands and Protected Areas of the Gulf of California	World Heritage Site (natural or mixed) (UA)	100

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

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 23/12/2024.