The site was identified as internationally important for bird conservation in 2008 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.
Species |
Red List |
Season (year/s of estimate) |
Size |
IBA criteria |
Greater Rhea Rhea americana |
NT |
resident (2001–2003) |
50-249 birds |
A1 |
Coscoroba Swan Coscoroba coscoroba |
LC |
resident (2001–2003) |
1,000–3,000 birds |
A4i |
Chilean Flamingo Phoenicopterus chilensis |
NT |
resident (2001–2003) |
66,000–100,000 birds |
A1, A4i |
Andean Flamingo Phoenicoparrus andinus |
VU |
resident (2001–2003) |
1,000–6,400 birds |
A1, A4i |
Puna Flamingo Phoenicoparrus jamesi |
NT |
non-breeding (2001–2003) |
1,000–4,000 birds |
A1, A4i |
Sickle-winged Nightjar Eleothreptus anomalus |
VU |
resident (2001–2003) |
< 50 birds |
A1 |
Dot-winged Crake Laterallus spilopterus |
VU |
resident (2001–2003) |
< 50 birds |
A1 |
White-winged Coot Fulica leucoptera |
LC |
resident (2001–2003) |
8,000–10,000 |
A4i |
Red-gartered Coot Fulica armillata |
LC |
resident (2001–2003) |
3,000–15,000 |
A4i |
White-faced Ibis Plegadis chihi |
LC |
resident (2001–2003) |
25,000–400,000 birds |
A4i |
Great White Egret Ardea alba |
LC |
resident (2001–2003) |
10,000–11,500 birds |
A4i |
Snowy Egret Egretta thula |
LC |
resident (2001–2003) |
7,800–400,000 birds |
A4i |
Neotropical Cormorant Nannopterum brasilianum |
LC |
breeding (2001–2003) |
25,000–42,000 birds |
A4i |
Black-winged Stilt Himantopus himantopus |
LC |
resident (2001–2003) |
1,000–11,000 birds |
A4i |
American Golden Plover Pluvialis dominica |
LC |
non-breeding (2001–2003) |
1,300–15,000 |
A4i |
White-rumped Sandpiper Calidris fuscicollis |
VU |
passage (2001–2003) |
800–15,000 birds |
A4i |
Wilson's Phalarope Steganopus tricolor |
LC |
non-breeding (2001–2003) |
250,000–500,000 |
A4i |
Lesser Yellowlegs Tringa flavipes |
VU |
non-breeding (2001–2003) |
5,000–15,000 |
A4i |
Greater Yellowlegs Tringa melanoleuca |
NT |
non-breeding (2001–2003) |
700–1,100 |
A4i |
Brown-hooded Gull Larus maculipennis |
LC |
resident (2001–2003) |
13,000–300,000 |
A4i |
Olrog's Gull Larus atlanticus |
NT |
resident (2001–2003) |
50-249 birds |
A1, A4i |
Crowned Solitary Eagle Buteogallus coronatus |
EN |
resident (2001–2003) |
< 50 pairs |
A1 |
Cordoba Cinclodes Cinclodes comechingonus |
LC |
resident (2001–2003) |
50-249 birds |
A2 |
Bay-capped Wren-spinetail Spartonoica maluroides |
LC |
resident (2001–2003) |
< 50 pairs |
A1 |
Bearded Tachuri Polystictus pectoralis |
NT |
resident (2001–2003) |
< 50 pairs |
A1 |
Dinelli's Doradito Pseudocolopteryx dinelliana |
NT |
resident (2001–2003) |
< 50 pairs |
A1 |
Dark-throated Seedeater Sporophila ruficollis |
NT |
winter (2001–2003) |
50-249 birds |
A1 |
A4iii Species group - waterbirds |
n/a |
resident (2001–2003) |
500,000-999,999 birds |
A4iii |