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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
Reddish Egret Egretta rufescens	NT	resident (2012)	149 individuals	A4, B1a, B3a
Brown Pelican Pelecanus occidentalis	LC	resident (2017)	4,145 individuals	A4, B3a
Heermann's Gull Larus heermanni	NT	resident (2015)	800 individuals	B1a
Elegant Tern Thalasseus elegans	NT	winter (2015)	150 individuals	B1a

Year	Protected Area	Designation (management category)	% coverage of IBA
1978	Área de Protección de Flora y Fauna Islas del Golfo de California	Flora and Fauna Protection Area (-)	100

Habitat	% of IBA	Habitat detail
Marine Intertidal	69
Shrubland	21
Other	8
Marine Neritic	2

Land use	% of IBA
fisheries/aquaculture	-

Zona Federal Marítimo Terrestre 

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Recommended citation
BirdLife International (2025) Important Bird Area factsheet: Isla Alcatraz (Mexico). Downloaded from https://datazone.birdlife.org/site/factsheet/isla-alcatraz-iba-mexico on 03/01/2025.