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Location Cape Verde, Santiago
Central coordinates 23o 43.00' West  14o 59.00' North
IBA criteria A4ii
Area 160 ha
Altitude 0 - 200m
Year of IBA assessment 2001

Site description The site comprises a c.8 km stretch of rugged cliffs along the south-western coast of the island of Santiago, from the fishermen’s village of Porto Mosquito to Baia do Inferno (Baia de Santa Clara), a large and relatively well-sheltered bay. The average height of the cliffs is c.30 m, but at Baia do Inferno they rise to 200 m and are exceedingly steep.

Key Biodiversity See Box for key species. The colony of Sula leucogaster on the southern cliffs of Baia do Inferno is the largest in Cape Verde and holds c.300 pairs (1988 estimate). Scattered pairs of Phaethon aethereus breed along this stretch of coast, the steepness of the cliffs explaining their survival. Together with some other scattered pairs which occur elsewhere along the coast, Santiago now holds about a quarter of the current total population of 100–125 pairs in Cape Verde. One or two pairs of Pandion haliaetus and some pairs of Egretta garzetta also breed along the cliffs.

Non-bird biodiversity: None known to BirdLife International.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Red-billed Tropicbird Phaethon aethereus breeding  25-30 breeding pairs  A4ii  Least Concern 

Land use

Land-use Extent (% of site)
fisheries/aquaculture -
not utilised -

References Hazevoet (1994, 1995).

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Coastal cliffs between Porto Mosquito and Baia do Inferno. Downloaded from on 26/10/2016

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