Strix varia

• Overview
• Interesting Facts
• Common Names
• Description
• Biology
• Taxonomy
• Similar Species
• More Info
• Further Reading
• Notes

Overview

Interesting Facts

Common Names

Click on the language to view common names.

Description

Physical Description

Habitat

This owl prefers wet forests with nearby wetlands or fields .

Vegetation: tropical lowland evergreen forest, pine-oak forests, tropical lowland evergreen forest, pine forests • Minimum Elevation: 1,300 meters • Maximum Elevation: 3,100 meters • Foraging Strata: Canopy • Center of Abundance: Middle montane: mountains, middle range, 1,600-2,600 m. • Sensitivity to Disturbance: Medium

Typically found at an altitude of 0 to 3,805 meters (0 to 12,484 feet).[1]

Ecology: List of Habitats :

•     1    Forest  
  
•     1.1    Forest - Boreal  
  
•     1.4    Forest - Temperate  
  
•     1.5    Forest - Subtropical/Tropical Dry  
  
•     1.9    Forest - Subtropical/Tropical Moist Montane  
  
•     5    Wetlands (inland)  
  
•     5.1    Wetlands (inland) - Permanent Rivers/Streams/Creeks (includes waterfalls )  
  
•     5.2    Wetlands (inland) - Seasonal/Intermittent/Irregular Rivers/Streams/Creeks  
  
•     5.5    Wetlands (inland) - Permanent Freshwater Lakes (over 8ha)  
  
•     5.6    Wetlands (inland) - Seasonal/Intermittent Freshwater Lakes (over 8ha)  
  
•     14    Artificial/Terrestrial  
  
•     14.4    Artificial/Terrestrial - Rural Gardens  
  
•     14.5    Artificial/Terrestrial - Urban Areas  

Biology

Diet

Mostly small mammals, with some birds.

Reproduction

The breeding season begins in mid-January, peaks in March, and extends through mid-May. Nests are usually located from 6-15 m (20-50 feet) high in a cavity or hollow of a tree , commonly a snag , in bottomland or moist forest . The Barred Owl will sometimes use the abandoned nest of a hawk or crow. The female lays 2-4 (usually 2-3) eggs that she incubates for 28-33 days. The male feeds the incubating female. The young are semi-altricial and fledge about 42 days after hatching .

• Breeding Habitat : Woodland
• Nest Type: Cavity
• Clutch Size: 2-3
• Length of Incubation : 28-33 days
• Days to Fledge: 42
• Number of Broods: 1

Migration

Nonmigratory

Behavior

Like most owls, it is nocturnal , being active mostly at night. It forages either by hunting on the wing and swooping down on the food when it is spotted or by hunting from a perch. The diet includes small mammals (especially mice, squirrels, and rabbits), birds, amphibians , reptiles , and some insects.

The call of the Barred Owl is a series of hoots that sounds like the phrase who-cooks-for-you or who-cooks-for-you-all. When several owls are in an area, they respond to each other's calls. Some calls are similar to the calls of monkeys and they are sometimes used for sound effects in motion picture jungle scenes.

Taxonomy

Notes

Name Status: Accepted Name .

Last scrutiny: 28-Sep-2005

Similar Species

Great Gray Owl, Spotted Owl

Members of the genus Strix

ZipcodeZoo has pages for 34 species and subspecies in this genus:

S. albitarsis (Rufous-Banded Owl) · S. albitarsus (Rufous-Banded Owl) · S. aluco (Eurasian Tawny Owl) · S. aluco aluco (Eurasian Tawny Owl) · S. butleri (Hume's Tawny Owl) · S. chacoensis (Chaco Owl) · S. fulvescens (Fulvous Owl) · S. huhula (Black-Banded Owl) · S. hylophila (Rusty Barred Owl) · S. leptogrammica (Brown Wood Owl) · S. leptogrammica leptogrammica (Brown Wood-Owl) · S. nebulosa (Great Grey Owl) · S. nebulosa nebulosa (Great Gray Owl) · S. nigrolineata (Black-And-White Owl) · S. occidentalis (Northern Spotted Owl) · S. occidentalis caurina (Northern Spotted Owl) · S. occidentalis lucida (Mexican Spotted Owl) · S. occidentalis occidentalis (California Spotted Owl) · S. ocellata (Mottled Wood Owl) · S. ocellata ocellata (Mottled Wood-Owl) · S. rufipes (Rufous-Legged Owl) · S. rufipes rufipes (Rufous-Legged Owl) · S. seloputo (Spotted Wood Owl) · S. seloputo seloputo (Spotted Wood-Owl) · S. uralensis (Père David's Owl) · S. uralensis uralensis (Ural Owl) · S. varia (Round-Headed Owl) · S. varia georgica (Barred Owl) · S. varia helveola (Barred Owl) · S. varia varia (Barred Owl) · S. virgata (Mottled Owl) · S. virgata virgata (Mottled Owl) · S. woodfordii (African Wood Owl) · S. woodfordii woodfordii (African Wood-Owl)

More Info

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Further Reading

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Notes

Contributors

• BirdLife International 2009. Strix varia. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloadedon 05February2012.
• Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 9, 2012.
• IUCN 2012. IUCN Red List of Threatened Species. Version 2011.2. . Downloaded on January 28, 2012.

Data Sources

Accessed through GBIF Data Portal December 09, 2007:

• Avian Knowledge Network, eBird
• Bernice Pauahi Bishop Museum, Bishop Museum Natural History Specimen Data
• Biologiezentrum der Oberoesterreichischen Landesmuseen, Biologiezentrum Linz
• Bird Studies Canada, BC Coastal Waterbird Survey
• Bird Studies Canada, Marsh Monitoring Program - Birds
• Bird Studies Canada, Ontario Breeding Bird Atlas 1981-1985
• Bird Studies Canada, Ontario Breeding Bird Atlas 2001-2005
• Canadian Biodiversity Information Facility, Ontario Nest Records
• Canadian Biodiversity Information Facility, Provincial Museum of Alberta, Edmonton, AB, Canada. Birds
• Canadian Biodiversity Information Facility, Royal British Columbia Museum
• New Brunswick Museum, NBM birds

Identifiers

• Biodiversity Heritage Library NamebankID: 9734
• Catalogue of Life Accepted Name Code: ITS-177921
• Global Biodiversity Information Facility Taxonkey: 2482044
• Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 177921
• IUCN ID: 244067
• Natural Heritage Network Species Identifier: ABNSB12020
• Zipcode Zoo Species Identifier: 214

Footnotes

1. Mean = 1,786.240 meters (5,860.367 feet), Standard Deviation = 1,531.190 based on 2,539 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]

©2004-2012 David Stang. All rights reserved.