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The site was identified as important in 1998 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species') at the site:

Species	Red List1	Season	Year(s)	Size	IBA criteria
African Penguin Spheniscus demersus	CR	resident	-	21,200 breeding pairs	A1, A4ii
African Penguin Spheniscus demersus	CR	non-breeding	-	60,000 individuals	A1, A4ii
Cape Gannet Morus capensis	EN	resident	-	59,000 breeding pairs	A1, A4ii
Cape Gannet Morus capensis	EN	non-breeding	-	140,000 individuals	A1, A4ii
African Oystercatcher Haematopus moquini	LC	resident	-	16-20 breeding pairs	A1, A4i
African Oystercatcher Haematopus moquini	LC	non-breeding	-	40-50 individuals	A1, A4i
Kelp Gull Larus dominicanus	LC	breeding	-	500-900 breeding pairs	A4i
Kelp Gull Larus dominicanus	LC	non-breeding	-	1,000-1,950 individuals	A4i
Roseate Tern Sterna dougallii	LC	breeding	-	180 breeding pairs	A4i
Roseate Tern Sterna dougallii	LC	non-breeding	-	400 individuals	A4i
Antarctic Tern Sterna vittata	LC	non-breeding	-	500-5,000 individuals	A4i
A4iii Species group - seabirds	n/a	resident	-	100,000-499,999 individuals	A4iii

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (1998) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 1998. The most recent assessment (2014) is shown below.

State (condition of the trigger species' habitats)
Habitat	Quantity (% remaining)	Quality (% carrying capacity)	Result
Grassland	good (> 90%)	moderate (70-90%)	near favourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Climate change and severe weather	likely in short term (within 4 years)	majority/most of area/population (50-90%)	moderate to rapid deterioration	high
Pollution	likely in short term (within 4 years)	whole area/population (>90%)	moderate to rapid deterioration	high
Residential and commercial development	likely in short term (within 4 years)	whole area/population (>90%)	moderate to rapid deterioration	high
Energy production and mining	likely in short term (within 4 years)	some of area/population (10-49%)	moderate to rapid deterioration	medium
Biological resource use	happening now	small area/few individuals (<10%)	moderate to rapid deterioration	low
Invasive and other problematic species and genes	happening now	small area/few individuals (<10%)	slow but significant deterioration	low
Transportation and service corridors	happening now	small area/few individuals (<10%)	slow but significant deterioration	low
Agricultural expansion and intensification	likely in short term (within 4 years)	some of area/population (10-49%)	no or imperceptible deterioration	low
Human intrusions and disturbance	likely in short term (within 4 years)	small area/few individuals (<10%)	no or imperceptible deterioration	low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Whole area of site (>90%) covered by appropriate conservation designation	A comprehensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species	Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity	high

Year	Protected Area	Designation	% overlap with IBA
1931	Addo-Elephant National Park	National Park	-
1979	Brenton Island (Algoa Bay)	Unknown	<1
1979	St. Croix Island (Algoa Bay)	Unknown	1
1979	Jahleel Island (Algoa Bay)	Unknown	<1
1988	Algoa Bay Seal Island Provincial Nature Reserve	Nature Reserve	<1
1988	Stag Island Provincial Nature Reserve	Nature Reserve	<1
1988	Stag Island (Algoa Bay)	Unknown	<1
1988	Algoa Bay Black Rocks Provincial Nature Reserve	Nature Reserve	<1
1988	Bird Island	Other Area	1

Habitat1	Habitat detail	% of IBA
Marine Coastal/Supratidal		major (>10)
Grassland		minor (<10)

1. IUCN Habitat classification.

Land use	% of IBA
nature conservation and research	100

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Algoa Bay Islands: Addo Elephant National Park (South Africa). Downloaded from https://datazone.birdlife.org/site/factsheet/algoa-bay-islands:-addo-elephant-national-park-iba-south-africa on 23/11/2024.