Estero Santa Cruz

IBA Justification

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 at site IBA criteria triggered
Horned Grebe Podiceps auritus VU winter 2017 37 individuals A1
Ridgway's Rail Rallus obsoletus NT resident 2014 45 B1a
Reddish Egret Egretta rufescens NT resident 2011 71 individuals B1a
Double-crested Cormorant Nannopterum auritus LC resident 2013 4,008 individuals B3a
Wilson's Plover Charadrius wilsonia LC winter 2011 1,540 A4, B3a
Snowy Plover Charadrius nivosus NT winter 2011 110 individuals B1a, B3a
Black Skimmer Rynchops niger LC winter 2013 302 individuals B3a
Heermann's Gull Larus heermanni NT resident 2014 1,320 individuals B1a
Elegant Tern Thalasseus elegans NT winter 2010 7,000 individuals A4, B1a, B3a
Royal Tern Thalasseus maximus LC winter 2010 500 individuals B3a
A4iii Species group - seabirds n/a - 2010 22,002 individuals B3b

Note: The current IUCN Red List category may differ from the category that was valid at the time of IBA criteria assessment.

For more information about the IBA criteria, please click here


IUCN Habitat Habitat detail Extent (% of site)
Forest Mangrove -
Marine Coastal/Supratidal -
For further information about the IUCN habitat classification, please click here.

Land use

Land-use Extent (% of site)
fisheries/aquaculture -
For further information about the land-use classification, please click here.

Land ownership
Zona Federal Marítimo Terretre

Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Estero Santa Cruz . Downloaded from on 06/06/2023.