The El Impenetrable National Park, in the Argentine Chaco, has been the scene of a significant discovery for ornithology and environmental conservation.
Park ranger Matías Almeida managed to document the presence of a Rufous-legged Owl (Aegolius harrisii), a rare bird species that had not been recorded in this ecosystem before.
The park administration highlighted the importance of this finding, pointing out that it reinforces the need to preserve natural ecosystems and protect the diversity of species that inhabit the region.

Rufous-legged Owl Characteristics
This species, first described by the American ornithologist John Cassin in 1849, stands out for its beauty and uniqueness.
Physical Appearance
Size: approximately 20 cm in length.
Coloration:
- Dark brown back with white spots on the wings.
- Line of brown spots on the scapulars.
- Orange face and lower parts, with a black outline around the facial area.
Brown eyes and dark chin.
Distribution and Habitat
The Rufous-legged Owl has a fragmented distribution in South America, being found in:
- Argentina.
- Bolivia.
- Brazil.
- Colombia.
- Ecuador.
- Paraguay.
- Peru.
- Uruguay.
- Venezuela.
It inhabits a variety of ecosystems, including:
- Moist and dry forests.
- Tropical savannas.
- Mountain forests and highly degraded areas.
Thanks to this record in El Impenetrable National Park, it now joins the semiarid Chaco, expanding its distribution range.
Behavior and Feeding
This nocturnal and solitary bird has habits that have not yet been thoroughly studied.
Its diet includes:
- Rodents and small mammals.
- Insects and other birds.
For reproduction, it lays its eggs in pre-existing cavities, taking advantage of dead tree trunks and palms within its natural habitat.
A Discovery that Reinforces the Importance of Conservation
The discovery of the Rufous-legged Owl in El Impenetrable National Park is a crucial advancement for biodiversity protection, highlighting the need to preserve these natural spaces.
This record opens up new opportunities for studying and monitoring the species, ensuring that their populations are protected in their environment.
A discovery that reminds us that, in every corner of the planet, nature continues to reveal its secrets, promoting a renewed commitment to environmental conservation.



