Strange Tailed Tyrant horizontal line

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

Read More

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!

Make a donation


Federal Amanecer a Reserva Don Luis Butorides striatus Tamandua tetradactyla Alouata caraya Cerdocyon thous Anas versicolor Jabiru mycteria Caiman yacare Jabiru mycteria Egretta egretta Plegadis chihi Fluvicola leucocephala Sturnella superciliaris Alouata caraya Rosita & Pablito Blastocerus dichotomus Sale del Sol a Reserva Don Luis Circonia maguiri Hydrochaeris hydrochaeris Aramides ypechaha Circus buffoni Alouata caraya Busarellus nigricollis Blastocerus dichotomus Dryadula phaetusa Don Luis Monte Grande Hydrochaeris hydrochaeris Leopardus Wiedii Caiman Yacare Blastocerus dichotomus Hydrochaeris hydrochaeris Tupinambus merianae Rhea americana Cerdocyon thous Heterospizias meridionalis Caiman yacare Otus choliba   Jabiru mcycteria Falco femoralis   Blastocerus dichotomus Ceryle torquata Myrmecophaga tridactyla Caiman Yacare Platalea ajaja Ozotoceros bezoarticus Tyrannus savana

Respect Other Species

Thank you for visiting our website. We're a small trust dedicated to preserving endangered species and defending the habitats that are essential to their survival.

Our wildlife reserve is made up of 1,600 hectares (4,000 acres)  of grassland/wetland in north-east Argentina. We purchased this former cattle ranch in 2010 and have since worked constantly to restore its ecological balance and provide a safe, sustainable habitat for its magnificent flora and fauna.  We are primarily a research station and welcome visiting naturalists, biologists, ornithologists, Bat workers, experienced bird ringers and keen amateurs interested in conservation. We are also after volunteers for the spring of 2016 (Sept - Nov)  See our page on Volunteering

Our Trust is also involved with the Jersey Bat Group, conducting Woodland Bat research in the island of Jersey, UK, where we have recently discovered two new species of bat for the island - Myotis alcathoe and Myotis daubentonii.   We have also put up 93 bat boxes in the island's woodlands in an effort to learn more about our local bats.

Our Transport at Reserva Don Luis                            

                               Maurio on horseback


We have several photo galleries that we hope you will look at including 'Birds of Ibera',  Mammals of Ibera,  Bat ID'Reptiles of Ibera', 'Endangered Species', 'Fauna of Iguazu' amongst others.  

Since April 2015 we have had an example of Crax fasciolata (Bare-faced Curassow) at our reserve, the first in Corrientes for decades.  From October onward we hope to start a breeding program with this species in order to create a viable population before releasing.  Read more here for information on this Cracid which is highly endangered in Argentina.


After 2 years of wet conditions due to El Nino, we are now in a dryer period and have prepared ourselves by cutting anti-fire paths and doing some controlled burning.  See our page Latest News.
We saw several male examples of the endangered Strange-tailed Tyrant with red throats during our trip to the reserve in August and we expect that they will have mated with the females by now. Nests should be built and eggs laid at the end of September/beginning of October.  We have authorisation to conduct research into the nesting behaviour of this bird which is attended to solely by the female although we have evidence that the male plays a role when the chicks have fledged.

Strange-tailed Tyrant, Alectrurus risora, Yetepa de Collar

                                 Alectrurus risora


The picture below is of a 7 Banded Armadillo, the smaller of the 2 Armadillo species that we have here.  We discovered this one in the garden near the houses.

Seven-Banded Armadillo

                                 Seven-banded Armadillo


We are currently involved in evaluating the bat species that inhabit this region which is known as the Esteros del Ibera or Ibera Marshes. Please look at our page on Identification of Bats. There is no official bat call library in Argentina so we are creating our own.    We have identified 16 different species from our recordings, some of which are relatively unknown here.  We have also spent some time mist netting for bats during the past year which has resulted in six different species - Molossops temminckii. Eumops patagonicus, Molossus rufusLasiurus ega, Eptesicus furinalis, Myotis nigricans and Myotis riparius.  Finally we feel we are making some progress toward identifying our bat species in a country in which they generally persecute these specialised mammals. See the bats that we have identified on our Mammals of Ibera page.   

In December last year we also spent some time in the NW mountaineous province of Jujuy, working with bats.  We captured several new species, most of which are also in our province of Corrientes, and we learnt a great deal from bat expert Cesar Bracamonte on techniques and ID.  We hope to return later this year.

We are also involved in batwork in the island of Jersey, Channel Islands with the Jersey Bat Group.  We are studying the habits of our woodland bat species and collecting data using bat boxes, static recorders and netting methods.

Lasiurus cinnereus, Hoary Bat                              

                             Hoary Bat


Patagonian Dwarf Bonneted Bat, Eumops patagonicus              



This is the second largest wetland in South America and is renowned for its biodiversity, in particular amongst the bird species.  We have several endangered species at our reserve including the Maned Wolf, Marsh Deer, Neotropical Otter, Strange-tailed Tyrant, Marsh Seedeater, Greater Rhea and Ochre-breasted Pipit.  We are constantly adding new papers to our page Scientific Reports.

We have some exciting plans for reintroductions, initially of the Bare-faced Curassow where we have made a significant step in obtaining a male for the reserve.

This is very much a live site, with new content and photographs being added constantly.  We will be back at the reserve in November and can update the site about our Bare-faced Curassow project.

We hope you'll enjoy your visit and that we'll be seeing you again.  Any queries please contact us at

Miranda Collett

                                            Marsh Deer



More about the Trust

Latest News

Newborn at Don Luis

Newborn at Don Luis

We are happy to announce the birth of a new faun to... More>>

Internet returns to Don Luis

Internet returns to Don Luis

Excellent news from the reserve. We have had our... More>>

New Bat Species for Reserve

New Bat Species for Reserve

In August 2016 we managed to catch this... More>>

Controlled Burning

Controlled Burning

Gustavo returned to help us with some controlled... More>>

Privacy Policy | Site Ownership | Conditions of Use | All content copyright ©2012, Collett Trust, all rights reserved | Web Design by Jem Shaw