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AnAge entry for Strix occidentalis

Classification (HAGRID: 02089)
TaxonomyKingdom: Animalia
    Phylum: Chordata
        Class: Aves (Taxon entry)
            Order: Strigiformes
                Family: Strigidae
                    Genus: Strix
SpeciesStrix occidentalis
Common nameSpotted owl

Lifespan, ageing, and relevant traits

Maximum longevity25 years (captivity)
Sourceref. 1
Sample sizesmall
Data qualityacceptable
Observations

Typical animals do not breed before age 3. The average longevity of these animals is about 15 years [0437]. Majority of pairs do not breed every year; some known to not breed over periods of 5-6 years [0445].

Life history traits (averages)

Female sexual maturity365 days
Male sexual maturity365 days
Incubation30 days
Clutch size2 (oviparous)
Clutches per year
Weight at hatching
Adult weight588.7 g
Postnatal growth rate

Metabolism

Typical body temperatureNot yet available
Basal metabolic rate2.6750 W
Body mass571.0 g
Metabolic rate per body mass0.004685 W/g

References
[0820] John Dunning (2008), CRC Handbook of Avian Body Masses
[0435] McKechnie and Wolf (2004), The allometry of avian basal metabolic rate: good predictions need good data, PubMed
[0444] John Terres (1980), The Audubon Society Encyclopedia of North American Birds
[0001] Longevity Records: Life Spans of Mammals, Birds, Amphibians, Reptiles, and Fish
[0437] FEIS by the USDA Forest Service
[0445] The Birds of North America Online

External resources

Integrated Taxonomic Information SystemITIS 177925
Animal Diversity WebADW account
Encyclopedia of LifeSearch EOL
Genome ProjectSearch NCBI
Entrez

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