Black-capped Screech-Owl
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Quick Facts
- Scientific Name: Megascops atricapilla
- Spanish Name: Autillo carinegro
- Family: Strigidae
- Known Nicknames: Black-capped Owl, Variable Screech-Owl
- Average Length: 23–25 cm / 9–10 in
- Average Weight: 140–200 g / 4.9–7.1 oz
- Wingspan: 50–60 cm / 20–24 in
- Key Feature: Distinct dark cap and prominent ear tufts
- Primary Diet: Carnivore (insects, small mammals, birds)
- Range: Southeastern Brazil, eastern Paraguay, northeastern Argentina
- Habitat: Subtropical or tropical moist lowland and montane forests
- Social Structure: Solitary or in pairs
- Nesting/Breeding: Tree cavities
- Conservation Status: Least Concern (LC)
- Population Trend: Decreasing
The Black-capped Screech-Owl (*Megascops atricapilla*) is a small, masterfully camouflaged nocturnal raptor native to the lowland forests of southeastern Brazil, Paraguay, and northeastern Argentina. Its most distinctive feature is the namesake dark, almost black crown and facial disc, which starkly contrasts with its pale, heavily streaked underparts and mottled gray-brown back, giving it the appearance of wearing a tiny hood. Unlike many screech-owls, it lacks prominent ear tufts, and its most remarkable special feature is its haunting, descending trill—a long, tremulous whistle that sounds more like a falling, ghostly wail than a screech, making it a phantom of the subtropical night.
Fun Facts
Despite its name, the Black-capped Screech-Owl rarely screeches; its primary call is a soft, accelerating series of low-pitched hoots that sounds like a bouncing ball, often mistaken for a frog. It possesses a remarkable ability to flatten its body and elongate its ear tufts to perfectly mimic a broken branch stub when threatened, a form of camouflage so convincing it can fool experienced birders. As an opportunistic hunter, it will readily snatch bats right out of the air in mid-flight, and it has been known to stash extra prey—like large insects or small rodents—in tree cavities for later consumption, a behavior called caching.
Habitats & Distribution
The Black-capped Screech-Owl inhabits a broad range of forested environments across eastern and southern Brazil, eastern Paraguay, and northeastern Argentina. It is primarily found in the Atlantic Forest biome, including its interior, edges, and secondary growth, but also occurs in gallery forests, semi-deciduous woodlands, and even shaded coffee plantations or urban parks with mature trees. It adapts well to fragmented landscapes as long as sufficient tree cover and cavity-bearing trees for nesting remain. Geographically, its distribution extends from the Brazilian states of Bahia and Minas Gerais southward through São Paulo, Rio de Janeiro, and into Rio Grande do Sul, continuing west into Paraguay and the Argentine province of Misiones. While it is common within its range, its presence is patchy in drier inland areas, and it is generally absent from the Amazon basin and open Cerrado savannas.
Behaviours & Reproduction
The Black-capped Screech-Owl is typically monogamous, with pairs forming long-term bonds and defending small territories year-round. Courtship involves duetting, where the male and female exchange low, trilling calls, and mutual preening. Nesting occurs in natural tree cavities or abandoned woodpecker holes, with no added nesting material. The female lays a clutch of 2 to 4 white eggs, which she incubates alone for about 26 to 28 days, while the male provides food. After hatching, both parents feed the altricial chicks, which fledge at around 30 days but remain dependent on the adults for several more weeks. A unique reproductive strategy is their ability to breed in relatively small, fragmented forest patches, as they are adaptable to secondary growth and edge habitats.
Diet
The Black-capped Screech-Owl is a strict carnivore, with a diet composed almost entirely of large insects and other arthropods, such as beetles, moths, katydids, crickets, spiders, and scorpions. It is an opportunistic hunter, also taking small vertebrates like frogs, lizards, and occasionally small birds or rodents when available. Unlike many owls that swallow prey whole, this species often tears apart larger insects before consuming them. A particularly interesting fact is that it frequently hunts from a perch, dropping silently onto prey on the ground or in foliage, and it may cache surplus food in tree cavities or crevices to eat later, especially during periods of scarcity.
Colors
The Black-capped Screech-Owl is primarily dark gray to brownish-gray, with a heavily mottled and barred pattern of black, white, and buff across the chest and belly. Its most distinctive feature is a contrasting black crown and facial disc, bordered by pale eyebrows and a white or buffy throat. This cryptic coloration, combined with vertical streaking on the underparts and small ear tufts, provides excellent camouflage against tree bark.
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