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The site was identified as important in 2007 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
Sharp-tailed Tyrant Culicivora caudacuta	LC	resident	1998-2007	present	A1
Ochre-breasted Pipit Anthus nattereri	VU	resident	1998-2007	present	A1
Chestnut Seedeater Sporophila cinnamomea	VU	passage	1998-2007	present	A1
Marsh Seedeater Sporophila palustris	EN	passage	1998-2007	present	A1

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2007) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2007. The most recent assessment (2011) is shown below.

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Invasive and other problematic species and genes	happening now	whole area/population (>90%)	very rapid to severe deterioration	very high
Residential and commercial development	happening now	majority/most of area/population (50-90%)	very rapid to severe deterioration	very high
Natural system modifications	happening now	whole area/population (>90%)	very rapid to severe deterioration	very high
Biological resource use	happening now	whole area/population (>90%)	very rapid to severe deterioration	very high

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	The conservation measures needed for the site are being comprehensively and effectively implemented	high

Year	Protected Area	Designation	% overlap with IBA
1994	Reserva Biológica Isla Yacyreta	Reserva de las Entidades Binacionales - Autarquico	100
1994	Yacyreta	Biological Reserve	100

Habitat1	Habitat detail	% of IBA
Wetlands (inland)		55
Forest	Tropical deciduous forest, Tropical semi-deciduous forest, Tropical semi-evergreen forest	22
Shrubland	Scrub	10
Savanna	Savanna	9
Grassland	Campo grassland	2

1. IUCN Habitat classification.

Land use	% of IBA
agriculture	2

Entidad Binacional Yacyreta

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Isla Yacyretá (Paraguay). Downloaded from https://datazone.birdlife.org/site/factsheet/isla-yacyretá-iba-paraguay on 23/11/2024.