Rusty-barred Owl
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Quick Facts
- Scientific Name: Strix hylophila
- Spanish Name: Búho barrado rojizo
- Family: Strigidae
- Known Nicknames: Rusty-barred Owl, Rusty-barred Wood Owl
- Average Length: 35–38 cm / 14–15 in
- Average Weight: 280–400 g / 10–14 oz
- Wingspan: 80–95 cm / 31–37 in
- Key Feature: Heavy rusty-brown barring on pale underparts
- Primary Diet: Carnivore (small mammals, birds, insects)
- Range: Southeastern Brazil, eastern Paraguay, northeastern Argentina
- Habitat: Subtropical and temperate forests, Araucaria forests
- Social Structure: Solitary or in pairs
- Nesting/Breeding: Tree cavities
- Conservation Status: Least Concern (LC)
- Population Trend: Decreasing
The Rusty-barred Owl (*Strix hylophila*) is a striking medium-sized owl endemic to the Atlantic Forest of southeastern Brazil, Paraguay, and northeastern Argentina. Its most distinctive feature is the rich, rusty-orange barring that covers its chest and belly, contrasting sharply with a dark, heavily streaked brown back and a prominent, unmarked facial disc with deep brown eyes. Unlike the similar Rusty-barred Owl’s close relative, the Tawny-browed Owl, this species lacks distinct “eyebrows,” giving it a softer, more mysterious expression. A special nocturnal hunter of the dense understory, it relies on its excellent hearing to snatch insects, small mammals, and birds, and is known for its resonant, far-carrying call—a series of low, hooting notes that often echoes through the forest at dusk.
Fun Facts
Despite its name, the rusty-barred owl’s most distinctive feature is its haunting, cat-like meow—a vocalization that often confuses hikers into thinking a domestic cat is lost in the forest. It has a quirky hunting tactic: instead of actively searching for prey, it frequently perches near army ant swarms, waiting to snatch insects and small vertebrates that flee the chaos. Uniquely among many owls, it shows a strong preference for bamboo thickets, using the dense, vertical stalks as both camouflage and a perch for ambushing prey, a specialization rare in the Strix genus.
Habitats & Distribution
The Rusty-barred Owl occupies the Atlantic Forest biome of southeastern South America, primarily found in Brazil from Minas Gerais and Espírito Santo south to Rio Grande do Sul, extending into eastern Paraguay and the Misiones province of northeastern Argentina. It inhabits humid, dense, old-growth subtropical and tropical forests, including montane cloud forests and lowland rainforests, where it relies on mature canopy cover and the presence of large trees for nesting cavities. This species is also recorded in adjacent bamboo thickets and selectively logged secondary forests, but it generally avoids open or heavily fragmented landscapes.
Behaviours & Reproduction
The Rusty-barred Owl is largely solitary outside the breeding season, with pairs forming only for reproduction. Mating involves vocal duets and mutual preening, and the pair typically reuses the same nest cavity or natural hollow in subsequent years. The female lays a clutch of two to three white eggs, which she incubates alone for approximately 28–30 days, while the male provides food. After hatching, the male continues to deliver prey, and both parents feed the altricial young for several weeks. The owlets fledge at around five to six weeks but remain dependent on the parents for an additional two to three months. A unique reproductive strategy is the species’ strong fidelity to specific forested territories, often defending the same nest site for years, which may help buffer against habitat fragmentation.
Diet
The Rusty-barred Owl is a carnivorous predator whose diet consists primarily of small mammals, particularly rodents like mice, rats, and voles, which it hunts by swooping silently from a perch in the dense Atlantic Forest canopy. It also opportunistically consumes a variety of other prey, including small birds, large insects such as beetles and moths, and occasionally amphibians or reptiles. An interesting aspect of its feeding behavior is that it often swallows smaller prey whole, later regurgitating indigestible parts like fur and bones in the form of compact pellets, which scientists study to understand its local prey availability. Additionally, while it is mainly nocturnal, this owl has been observed hunting during twilight hours in overcast conditions, and its diet can shift seasonally—consuming more insects during warmer months when they are abundant and relying more heavily on mammals during cooler periods.
Colors
The Rusty-barred Owl has a warm, rufous-brown back and wings marked with fine, pale horizontal barring, while its underparts are whitish-buff with bold, dark brown vertical streaks. Its facial disc is pale brown with dark concentric rings, and it lacks ear tufts. This cryptic plumage blends seamlessly with tree bark and dappled forest light, providing excellent camouflage in its South American woodland habitat.
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