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Strange Tails

We're delighted to have a strong population of strange-tailed tyrants at the reserve. So much so that we've adopted these beautiful and endangered birds as the symbol of the Trust

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Help Wanted

We need your help to provide a safe, sustainable environment for these irreplaceable and seriously threatened animals. Your donations - however small - are very welcome indeed, and if you can volunteer useful skills then we'd love to hear from you!

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Bat Species of Ibera


The Esteros del Ibera is a vast, relatively undiscovered wetland and, until recently, little study has been done on its bats species and certainly none in the northern gateway known as Cambyreta.  

Due to the amount of water and thus insects, it is a paradise for insectivorous bats.  Limitations are the amount of available roosts as there are few buildings and the trees are generally shorter than 15m.  It is likely that bats come to hunt in the area from some of the small towns and villages around the wetlands.  We also have an abundance of native fruit which attracts fruit eating species especially in the warmer months.

However we have found several tree roosts and the two houses, cabana and shed at the reserve are teeming with bats - mostly Molossus temminckii or Dwarf Dog-faced Bat.

We are well underway on a new bat call library for Cambyreta and for this we need many bat recordings.  We have already recorded around 16 different species of bat around the houses but need to more long-term static recording at our remote areas so we can get a broader picture of our species. We record all hand releases of insectivorous bats.

The conditions in Ibera are ideal for the family Noctilionidae which are known as the fishing Bats.  We saw Noctilio albiventris flying low over our laguna a couple of years ago.  It hunts in a similar manner to the European Daubenton's Bat catching insects over the surface of the water.  At times it may also take small fish.  We have recordings of this species and its larger cousin, Noctilio leporinus, from another location in Corrientes but we are sure that it exists in the Ibera park, especially close to the larger lakes.

We are also involved in capturing bats for ID and biometrics and now have some high end equipment including 2 Harp traps, 1 triple high set up as well as a double high, hand nets etc.

We now have authorisation to conduct bat research in the province of Corrientes, thanks to Recurses Naturales and also in the Provincial Parks of Corrientes, thanks to Parque y Reservas.  We are also working with Cesar Bracamonte in research into Argentine bats and are in the process of producing a book with photographs of the national bats.

The following photos are of bats we have caught, measured, identified, photographed, recorded and released over the past three years.  Most of these bats can be found in Corrientes, and many can be found in the Ibera Marshes.


Molossus temminckii (Dwarf Dog-faced Bat) - insectivorous

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Dwarf Dog-faced Bat



Eumops patagonicus (Dwarf Bonneted Bat) - insectivorous

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Patagonian Dwarf Bonneted Bat


Molossus rufus (Black Mastiff Bat) - insectivorous

Read here for more information:

Molossus rufus



Dasypterus ega (Southern Yellow Bat) - insectivorous

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Eptesicus furinalis (Argentine Brown Bat) - insectivorous

For more information:

Argentine Brown Bat



Myotis nigricans (Black Myotis) - insectivorous

For more information

Black Myotis



Desmodus rotundus (common Vampire)  - Sangivorous

Common at Reserva Don Luis

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Lasiurus Cinereus (Hoary Bat) - insectivorous

 This bat was caught in another province but we frequently hear their echolocation calls at the Reserve.

More information:

Hoary Bat



Lasiurus blossevillii (Western Red Bat) - insectivorous

We have this species at Reserva Don Luis and capture it quite regularly in the cooler months.

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Lasiurus blossevillii



Sturnira lilium (LIttle Yellow-shouldered Bat) - frugivorous

This bat is common at Reserva Don Luis in the warmer months

More information:

Little Yellow-shouldered Bat


Myotis Riparius (Riparian Myotis) - insectivorous

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Eptesicus diminutus (Diminutive Serotine) - insectivorous

This bat was caught in the province of Jujuy

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Anoura caudifer (Tailed Tailess bat) - nectivorous

This bat was captured in the province of Jujuy and is seen here happily taking nectar from our syringe.

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Little Long-tongued brown bat


Histiotus macrotis (Big-eared Brown Bat) - insectivorous

This bat was caught in the province of Jujuy

More information:

Long-eared Brown Bat


Molossus molossus (Velvety Free-tailed Bat) - insectivorous

This bat was caught in the province of Buenos Aires but is also found in Corrientes

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Velvety Free-tailed Bat


Artibeus lituratus (Great Fruit-eating Bat) - frugivorous

This bat was caught in another province but should be in Ibera and we are expecting to encounter it any day.

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Eptesicus brasiliensis (Brasilian Brown Bat) - insectivorous

This bat was captured at Reserva Don Luis

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Eptesicus brasiliensis


Eumops bonariensis (Peter's Mastiff Bat) - insectivorous

This bat was captured at Reserva Don Luis in Sept 2017

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Myotis albescens (Silver-tipped Myotis) - insectivorous

This bat is reasonably common in Corrientes but we have not yet encountered it at the reserve.

More information:

Silver-tipped Myotis


Myotis simus (Velvety Myotis) - insectivorous

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Myotis simus


Platyrrhinus lineatus (White-lined Bat) - Frugivorous

We encountered an individual at Reserva Don Luis in October 2017

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Artibeus fimbriatus (Fringed Fruit-eating Bat) - Frugivorous

This species was encountered in another province but can be found in Corrientes

more information:



Pygoderma biliabatum (Ipanema Bat) - Frugivorous

This species was found in a nearby province but can be found in Corrientes

more information:

Pygoderma biliabatum


Tadarida brasiliensis (Brasilian Free-tailed Bat) - insectivorous

This species was found in anaother province and apparently does not exist in Corrientes

More information

Tadarida brasiliensis



Carollia perspicillata (Seba's Short-tailed Bat) - Frugiverous

This species was found in a neighbouring province (Misiones) but is very likely in Corrientes.

more information

Seba's Short-tailed Bat


Glosophaga soricina (Pallas's Long-tongued Bat) - nectivorous

This species was found in a neighbouring province (Misiones) but is likely to be in the gallery forests of Corrientes

more information

Seba's Short-tailed Bat


We wish to thank Pico Frago from Parques y Reservas, Corrientes, for authorisation to conduct this research into our local bats.  We also wish to thank Recurses Naturales for permission to widen our research throughout the province of Corrientes.





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