Nicoya Gulf mangroves and coastal areas

IBA Justification

The site was identified as important in 2007 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species'):
Species Current IUCN Red List Category Season Year(s) Population estimate at site IBA criteria met
Mangrove Hummingbird Amazilia boucardi EN breeding 2006 1,000-2,499 individuals A1
Tricolored Heron Egretta tricolor LC resident 2006 800-1,200 individuals A4i
Grey Plover Pluvialis squatarola LC resident 2006 1,500-2,000 individuals A4i
Semipalmated Plover Charadrius semipalmatus LC breeding 2006 1,500-1,800 individuals A4i
Collared Plover Charadrius collaris LC resident 2006 300-500 individuals A4i
Whimbrel Numenius phaeopus LC winter 2006 250-999 individuals A4i
Marbled Godwit Limosa fedoa LC winter 2006 800-1,200 individuals A4i
Ruddy Turnstone Arenaria interpres LC winter 2006 2,000-3,000 individuals A4i
Red Knot Calidris canutus NT winter 2006 300-500 individuals A4i
Surfbird Calidris virgata LC winter 2006 400-700 individuals A4i
Sanderling Calidris alba LC winter 2006 2,000-3,000 individuals A4i
Least Sandpiper Calidris minutilla LC unknown 2006 5,000-10,000 individuals A4i
Western Sandpiper Calidris mauri LC winter 2006 10,000-19,999 individuals A4i
Short-billed Dowitcher Limnodromus griseus LC winter 2006 1,000-1,500 individuals A4i
Spotted Sandpiper Actitis macularius LC winter 2006 1,500-2,000 individuals A4i
Wandering Tattler Tringa incana LC winter 2006 50-100 individuals A4i
Willet Tringa semipalmata LC winter 2006 2,000-2,500 individuals A4i
Greater Yellowlegs Tringa melanoleuca LC winter 2006 800-1,100 individuals A4i
Royal Tern Thalasseus maximus LC resident 2006 500-1,000 individuals A4i
A4iii Species group - waterbirds n/a winter 2006 20,000-49,999 individuals A4iii

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2007).

IBA Protection

Protected area (PA) PA designation PA area (ha) Relationship of PA with IBA Overlap of PA with IBA (ha)
La Ensenada (mixto) Refugio de Vida Silvestre 484 protected area overlaps with site 0
Estero Puntarenas y manglares Humedal 5,173 protected area overlaps with site 0
Cipanci (estatal) Refugio de Vida Silvestre 3,492 protected area is adjacent to site 0


Habitat (IUCN level 1) Habitat detail Extent (% of site)
Forest Mangrove -
For more information about the IUCN Habitat classification, please click here.

Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Nicoya Gulf mangroves and coastal areas. Downloaded from on 07/12/2023.