Islas Marietas

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
Brown Booby Sula leucogaster LC resident 2010 10,000 individuals A4, B3a
Heermann's Gull Larus heermanni NT resident 2019 1,000 individuals B1a
Bridled Tern Onychoprion anaethetus LC winter 2018 50 individuals B3a
Elegant Tern Thalasseus elegans NT non-breeding 2019 800 individuals A4, B1a, B3a

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)
Islas Marietas Parque Nacional 1,383 protected area contained by site 0
Islas Marietas Parque Nacional 1,383 protected area contained by site 0
Islas Marietas Ramsar Site, Wetland of International Importance 1,357 protected area contained by site 1,357
Islas Marietas UNESCO-MAB Biosphere Reserve 1,383 protected area contained by site 0
Islands and Protected Areas of the Gulf of California World Heritage Site (natural or mixed) 1,899,035 protected area overlaps with site 0


IUCN Habitat Habitat detail Extent (% of site)
Sea Open sea -
Forest Tropical semi-deciduous -
Marine Neritic -
For further information about the habitat classification please click here.

Land ownership
Tenencia de la tierra: Federal.

Recommended citation
BirdLife International (2023) Important Bird Areas factsheet: Islas Marietas. Downloaded from on 29/01/2023.