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The site was identified as internationally important for bird conservation 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 List	Season (year/s of estimate)	Size	IBA criteria
African Penguin Spheniscus demersus	CR	resident (-)	21,200 pairs	A1, A4ii
African Penguin Spheniscus demersus	CR	non-breeding (-)	60,000 birds	A1, A4ii
Cape Gannet Morus capensis	EN	resident (-)	59,000 pairs	A1, A4ii
Cape Gannet Morus capensis	EN	non-breeding (-)	140,000 birds	A1, A4ii
African Oystercatcher Haematopus moquini	LC	resident (-)	16–20 pairs	A1, A4i
African Oystercatcher Haematopus moquini	LC	non-breeding (-)	40–50 birds	A1, A4i
Kelp Gull Larus dominicanus	LC	breeding (-)	500–900 pairs	A4i
Kelp Gull Larus dominicanus	LC	non-breeding (-)	1,000–1,950 birds	A4i
Roseate Tern Sterna dougallii	LC	breeding (-)	180 pairs	A4i
Roseate Tern Sterna dougallii	LC	non-breeding (-)	400 birds	A4i
Antarctic Tern Sterna vittata	LC	non-breeding (-)	500–5,000 birds	A4i
A4iii Species group - seabirds	n/a	resident (-)	100,000-499,999 birds	A4iii

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%)	moderate

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Climate change and severe weather	happe­ning now	some of popul­ation/area (10–49%)	slow decline (1–10% over 3 gener­ations)	medium
Energy production and mining	likely in short term (<4 years)	some of popul­ation/area (10–49%)	moderate decline (10–30% over 3 gener­ations)	medium
Human intrusions and disturbance	happe­ning now	some of popul­ation/area (10–49%)	no or slight decline (<1% over 3 gener­ations)	low
Biological resource use	happe­ning now	few indivi­duals/small area (<10%)	moderate decline (10–30% over 3 gener­ations)	low
Invasive and other problematic species and genes	happe­ning now	few indivi­duals/small area (<10%)	slow decline (1–10% over 3 gener­ations)	low
Transportation and service corridors	happe­ning now	few indivi­duals/small area (<10%)	slow decline (1–10% over 3 gener­ations)	low
Pollution	happe­ning now	few indivi­duals/small area (<10%)	no or slight decline (<1% over 3 gener­ations)	low
Residential and commercial development	happe­ning now	few indivi­duals/small area (<10%)	no or slight decline (<1% over 3 gener­ations)	low
Agricultural expansion and intensification	likely in short term (<4 years)	some of popul­ation/area (10–49%)	no or slight decline (<1% over 3 gener­ations)	low

Response (conservation actions taken for the trigger species and/or their habitats)
Designation	Planning	Action	Result
Whole area (>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 (management category)	% coverage of IBA
1979	Brenton Island (Algoa Bay)	Unknown (-)	<1
1979	Jahleel Island (Algoa Bay)	Unknown (-)	<1
1979	St. Croix Island (Algoa Bay)	Unknown (-)	1
1988	Bird Island	Other Area (II)	1
1988	Stag Island (Algoa Bay)	Unknown (-)	<1

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

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 23/12/2024.