The Owl Pages

Spectacled Owl - Pulsatrix perspicillata

 
Calls - Pulsatrix perspicillata
Typical Call Costa Rica © Jorge Corrales
Threat Call, female El Gavilan, Costa Rica, June 1999 © Doug Von Gausig

Description: Spectacled Owls are dark brown with a whitish to yellow-ochre belly, a white patch on the front of the neck and a dark brown belt across the breast. White "spectacles" around their yellow eyes give them their name.
A juvenile has the adult markings in reverse - a white head with black mask, and may take several years from hatching to attain full adult plumage.

Habits: An unsociable bird. Generally nocturnal, with activity normally begining after dusk and continuing to dawn. Roosts singly by day in trees with dense foliage. Most vocal on calm, moonlit nights.

Size: Length 43-46cm (17-18")
Weight male 453-680g (16-24oz)  female 680-906g (24-32oz)

Voice: A series of knocking or tapping sounds with a poping effect "PUP-pup-pup-pup-po", each successive note being lower and weaker, and the rhythm quicker as the series progresses.
The Female also has a hawk-like scream "ker-WHEEER", which has been likened to a steam whistle.

Hunting & Food: Spectacled Owls eat small mammals including mice and the occasional possum or skunk, insects, spiders, many Caterpillars, bats, birds up to the size of Jays, crabs and frogs.
They use a branch to perch on and scan the surrounding area. When prey is located, they drop with a swift pounce. Insects are snatched from foliage.

Breeding: In Costa Rica, eggs are laid in the dry season, or at the start of the wet season. Spectacled Owls nest in tree hollows and lay 1-2 eggs, which are incubated by the female for about 5 weeks. Chicks leave the nest for surrounding branches at about 5-6 weeks, well before they can fly, but depend on their parents for up to a year once fledged. Often, only one chick will survive.

Habitat: Occurs more frequently in dense tropical rainforest with mature, large trees, including forest edges. Also found in dry forest, treed savannah habitat, plantations and open areas with scattered trees.

Distribution: Mexico, Central America, Northern two-thirds of South America.

Distribution of Pulsatrix perspicillata
Distribution of Pulsatrix perspicillata

Status: Generally uncommon, but locally common in areas such as Costa Rica, Colombia and the Amazon.

Original Description: Latham, John. 1790. Index orntihologicus, sive Systema ornithologiae; complectens avium divisionem in classes, ordines, genera, species, ipsarumque varietates: adjectis synonymis, locis, descriptionibus, &c. (Index Orn.) 1: p 58.

Subspecies: P. p. perspicillata, P. p. boliviana, P. p. chapmani, P. p. saturata, P. p. trinitatis

References:

Duncan, James R.. 2003. "Owls of the World: Their Lives, Behavior and Survival". Firefly Books
König, Weick and Becking. 1999. "Owls: A Guide to the Owls of the World". Yale University Press
Sterry, Paul. 1995. "Owls: A Portrait of the Animal World". Smithmark

Page Information:

Page compiled by Deane P. Lewis.

OwlPages.com Owl Species ID: 170.010.000 - Page last updated 2005-04-21

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