Resumen

POLZELLA, Agostina S. Juncosa; MERLO, Francis; CURA, Miguel F.  y  ZARATE, Valentín. SMALL OWLS IN RELATION TO HABITAT STRUCTURE: OCCURRENCE OF TROPICAL SCREECH-OWL (MEGASCOPS CHOLIBA) AND FERRUGINOUS PYGMY- OWL (GLAUCIDIUMBRASILIANUM) IN THE MOUNTAIN FORESTS OF CENTRAL ARGENTINA. Hornero [online]. 2020, vol.35, n.2, pp.87-94. ISSN 0073-3407.

Owls are top predators poorly studied in the Neotropics. Their occurrences can be affected by forest structure and landscape features. We report Tropical Screech-Owl (Megascops choliba) and Ferruginous Pyg- my-Owl (Glaucidium brasilianum) detections in relation to habitat characteristics in central Argentina. During the spring of 2019, we surveyed 250 ha of mountain forest, measured habitat characteristics in presences/ab- sences sites, and estimated owls’ densities. M. choliba (0.16 individuals/ha) was positively associated with snag whereas G. brasilianum (0.05 individuals/ha) was positively associated with proportions of small trees. Our re- sults suggest that these habitat characteristics might be important covariates when studying these two species.

Palabras clave : Ferruginous Pygmy-Owl; forest structure; landscape; nocturnal raptors; predators; presence-absence; Tropical Screech-Owl.

        · resumen en Español     · texto en Inglés     · Inglés ( pdf )