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The site was identified as important in 2008 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
Rhea pennata	NR	breeding	2001-2003	1,000-2,499 individuals	A1
Patagonian Tinamou Tinamotis ingoufi	LC	resident	2001-2003	present	A3
Hooded Grebe Podiceps gallardoi	CR	breeding	1997	1,000-2,499 individuals	A1, A2, A3, A4i
Chilean Flamingo Phoenicopterus chilensis	NT	passage	2001-2003	50-249 individuals	A1
Magellanic Plover Pluvianellus socialis	VU	passage	2001-2003	< 50 individuals	A1, A2, A3
Short-billed Miner Geositta antarctica	LC	breeding	2001-2003	250-999 individuals	A2, A3
Cinnamon-bellied Ground-tyrant Muscisaxicola capistratus	LC	resident	2001-2003	present	A3
Chocolate-vented Tyrant Neoxolmis rufiventris	LC	breeding	2001-2003	50-249 individuals	A2, A3
Patagonian Yellow-finch Sicalis lebruni	LC	resident	2001-2003	present	A3

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2008) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2008. The most recent assessment (2019) is shown below.

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Agricultural expansion and intensification	happening now	majority/most of area/population (50-90%)	moderate to rapid deterioration	high
Invasive and other problematic species and genes	happening now	whole area/population (>90%)	slow but significant deterioration	high
Climate change and severe weather	happening now	whole area/population (>90%)	slow but significant deterioration	high

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Some of site covered (10-49%)	A comprehensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species	The conservation measures needed for the site are being comprehensively and effectively implemented	medium

Year	Protected Area	Designation	% overlap with IBA
2015	Patagonia	Parque Nacional	5

The Local Conservation Group(s) listed below are working to conserve this IBA.

Name	Year formed
Club Observadores de Aves (COAS) Patagonia Sur - Río Gallegos	2007

For more information on BirdLife's work with Local Conservation Groups, please click here.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Meseta Lago Buenos Aires (Argentina). Downloaded from https://datazone.birdlife.org/site/factsheet/meseta-lago-buenos-aires-iba-argentina on 22/11/2024.