Tropical Screech-Owl

Quick Facts

• Scientific Name: Megascops choliba
• Spanish Name: Currucutú
• Family: Strigidae
• Known Nicknames: Choliba Screech-Owl, Coruja-do-mato, Autillo choiba
• Average Length: 21–23 cm / 8.3–9.1 in
• Average Weight: 97–160 g / 3.4–5.6 oz
• Wingspan: 48–54 cm / 19–21 in
• Key Feature: Prominent ear tufts and a distinct facial disk bordered with black
• Primary Diet: Primarily Insectivore (Insects and small vertebrates)
• Range: Central and South America, from Costa Rica to Northern Argentina and Uruguay
• Habitat: Open woodland, savanna, secondary growth, and urban parks
• Social Structure: Solitary or monogamous pairs
• Nesting/Breeding: Tree hollows, cavities, or abandoned nests of other birds
• Conservation Status: Least Concern (LC)
• Population Trend: Stable

The Tropical Screech-Owl (*Megascops choliba*) is a master of camouflage and one of the most adaptable raptors found across Central and South America. This small to medium-sized owl is renowned for its incredible plumage polymorphism, appearing in gray, brown, or rufous color morphs that feature intricate, herringbone-shaped dark streaks designed to mimic tree bark perfectly. Its most striking physical traits include piercing yellow eyes, a prominent facial disk bordered in black, and small, expressive ear tufts that it can raise or lower to signal its mood. While its name suggests a harsh cry, this nocturnal predator is actually known for a rhythmic, bubbling trill or "staccato" song that echoes through environments ranging from dense rainforests to urban gardens, where it skillfully hunts for a diet of insects and small vertebrates.

Fun Facts

Despite their name, these owls rarely screech, instead communicating through a rhythmic, bubbling trill that sounds like a tiny motor. When threatened, they perform a dramatic "tall-thin" display, elongating their bodies and flattening their feathers to perfectly mimic a dead tree branch. Their cryptic plumage is so effective at blending into bark that they often hide in plain sight during the day, frequently utilizing abandoned termite mounds as nesting sites. Interestingly, their iconic "ear tufts" have nothing to do with hearing; they are simply feather arrangements used to break up their silhouette and signal their mood to other owls.

Habitats & Distribution

This species occupies a vast geographical range extending from Costa Rica and Panama throughout most of South America, reaching as far south as northern Argentina and Uruguay. It is notably absent from the high elevations of the Andes and the densest interiors of the Amazonian rainforest, preferring more open or edge environments across the continent. Highly adaptable, it thrives in a diverse array of semi-open landscapes, including deciduous forests, savannas, and shrublands. It is frequently found in human-altered environments such as plantations, suburban parks, and urban gardens. It typically avoids heavily forested primary jungles, instead favoring forest edges and secondary growth where it can find suitable nesting cavities.

Behaviours & Reproduction

Primarily nocturnal and strictly monogamous, these owls maintain stable social structures where pairs often remain together year-round to defend their territory through complex vocal duets. During the breeding season, which typically coincides with the transition from the dry to the rainy season, the male performs courtship displays involving ritualized feeding to strengthen the pair bond. They are secondary cavity nesters, meaning they do not build their own nests but instead occupy existing hollows in trees, old woodpecker holes, or even man-made nest boxes. The female typically lays a clutch of one to four eggs and is responsible for the entire incubation period, which lasts about three to four weeks. Throughout this time, the male acts as the sole provider, hunting insects and small vertebrates to feed the nesting female. A notable reproductive strategy is their strong site fidelity; pairs frequently return to the same nesting cavity for several consecutive years. Once the chicks hatch, both parents share the responsibility of feeding and guarding the brood until the young fledge and achieve independence.

Diet

The Tropical Screech-Owl is a versatile and opportunistic predator whose diet primarily consists of large arthropods, making it largely insectivorous. It frequently hunts grasshoppers, crickets, beetles, moths, and spiders, often utilizing a "sit-and-wait" strategy where it perches on low branches to scan for movement before swooping down to seize prey. Beyond insects, this owl also consumes a variety of small vertebrates, including rodents, small birds, bats, lizards, snakes, and frogs, showcasing its adaptability to different habitats. An interesting aspect of its feeding behavior is its tendency to hunt near artificial light sources in suburban areas to exploit the high concentration of nocturnal insects gathered there. Like other raptors, it swallows smaller prey whole and later regurgitates pellets containing indigestible remains such as bones, fur, and insect chitin.

Colors

The Tropical Screech-Owl features polymorphic plumage ranging from grayish-brown to rufous, intricately patterned with dark vertical streaks and fine horizontal cross-bars that mimic tree bark for camouflage. It is distinguished by a prominent black border framing its facial disk, bright yellow eyes, and small ear tufts. This "herringbone" breast pattern and mottled dorsal coloring allow the owl to blend seamlessly against woodland trunks during the day.