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The site was identified as important in 2022 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
Black Skimmer Rynchops niger	LC	non-breeding	2020-2022	1,000-4,000 individuals	A4, B3a
Olrog's Gull Larus atlanticus	NT	non-breeding	2016	125 individuals	B1a, B3a
Common Tern Sterna hirundo	LC	non-breeding	2017	20,000-30,000 individuals	B3a
A4iii Species group - waterbirds	n/a	non-breeding	2016-2022	21,125-34,125 individuals	B3b

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2022) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2022. The most recent assessment (2019) is shown below.

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Human intrusions and disturbance	happening now	whole area/population (>90%)	very rapid to severe deterioration	very high
Agricultural expansion and intensification	happening now	majority/most of area/population (50-90%)	moderate to rapid deterioration	high
Energy production and mining	happening now	some of area/population (10-49%)	very rapid to severe deterioration	high
Climate change and severe weather	happening now	small area/few individuals (<10%)	very rapid to severe 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90%) covered by appropriate conservation designation	A management plan exists but it is out of date or not comprehensive	Some limited conservation initiatives are in place	medium

Year	Protected Area	Designation	% overlap with IBA
1984	Parque Costero del Sur	UNESCO-MAB Biosphere Reserve	7
1997	Bahía de Samborombón	Reserva Natural Integral	93
1997	Bahía de Samborombón	Ramsar Site, Wetland of International Importance	100
1997	Rincón de Ajó	Reserva Natural Integral	2
2009	Campos del Tuyú	Parque Nacional	1

Habitat1	Habitat detail	% of IBA
Grassland	Southern temperate grassland	major (>10)
Marine Coastal/Supratidal		major (>10)
Marine Intertidal		major (>10)
Marine Neritic		major (>10)
Artificial/Aquatic & Marine		minor (<10)
Forest	Temperate deciduous woods	minor (<10)

1. IUCN Habitat classification.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Bahía Samborombón (Argentina). Downloaded from https://datazone.birdlife.org/site/factsheet/bahía-samborombón-iba-argentina on 23/11/2024.