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Location South Africa, Eastern Cape
Central coordinates 26o 2.00' East  33o 49.00' South
IBA criteria A1, A4i, A4ii, A4iii
Area 40 ha
Altitude 0 - 58m
Year of IBA assessment 2001

BirdLife South Africa



Summary Located to the east of Port Elizabeth, in the large arc of Algoa Bay, this IBA consists of two groups of three islands each. One group comprises the large St Croix Island with the much smaller Jahleel and Brenton Rocks stacks closer inshore. 

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Jackass Penguin Spheniscus demersus resident  21,200 breeding pairs  A1, A4ii  Endangered 
Jackass Penguin Spheniscus demersus winter  60,000 individuals  A1, A4ii  Endangered 
Cape Gannet Morus capensis resident  59,000 breeding pairs  A1, A4ii  Vulnerable 
Cape Gannet Morus capensis winter  140,000 individuals  A1, A4ii  Vulnerable 
African Oystercatcher Haematopus moquini resident  16-20 breeding pairs  A1, A4i  Near Threatened 
African Oystercatcher Haematopus moquini winter  40-50 individuals  A1, A4i  Near Threatened 
Antarctic Tern Sterna vittata winter  500-5,000 individuals  A4i  Least Concern 
Kelp Gull Larus dominicanus breeding  500-900 breeding pairs  A4i  Least Concern 
Kelp Gull Larus dominicanus winter  1,000-1,950 individuals  A4i  Least Concern 
Roseate Tern Sterna dougallii breeding  180 breeding pairs  A4i  Least Concern 
Roseate Tern Sterna dougallii non-breeding  400 individuals  A4i  Least Concern 
A4iii Species group - seabirds resident  100,000-499,999 individuals  unknown  A4iii   

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Bird Island Other Area 4 protected area contained by site 19  
Black Rocks (Algoa Bay) Unknown 1 protected area contained by site 1  
Brenton Island (Algoa Bay) Unknown 3 protected area contained by site 3  
Jahleel Island (Algoa Bay) Unknown 3 protected area contained by site 3  
Seal Island (Algoa Bay) Unknown 1 protected area contained by site 1  
St. Croix Island (Algoa Bay) Unknown 14 protected area contained by site 14  
Stag Island (Algoa Bay) Unknown 1 protected area contained by site 1  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Unknown   -

Land use

Land-use Extent (% of site)
nature conservation and research 100%

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Algoa Bay Island Nature Reserve. Downloaded from http://www.birdlife.org on 28/08/2014

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