Animalia > Chordata > Aves > Strigiformes > Strigidae > Strix > Strix occidentalis

Strix occidentalis (Spotted Owl)

Synonyms: Syrnium occidentale
Language: Spanish

Wikipedia Abstract

The spotted owl (Strix occidentalis) is a species of true owl. It is a resident species of old-growth forests in western North America, where it nests in tree holes, old bird of prey nests, or rock crevices. Nests can be between 12 to 60 metres (39 to 197 ft) high and usually contain two eggs (though some will contain as many as four). It is a nocturnal owl, which feeds on small mammals and birds. Three subspecies are recognized, ranging in distribution from British Columbia to Mexico. The spotted owl is under pressure from habitat destruction throughout its range, and is currently classified as near threatened.
View Wikipedia Record: Strix occidentalis

Infraspecies

Strix occidentalis caurina (Northern Spotted Owl) (Attributes)
Strix occidentalis juanaphillipsae (Spotted owl)
Strix occidentalis lucida (Mountain spotted owl) (Attributes)
Strix occidentalis occidentalis (California spotted owl) (Attributes)

EDGE Analysis

Uniqueness Scale: Similiar (0) 
4
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
34
 Unique & Vulnerable (100)
ED Score: 8.58579
EDGE Score: 2.95343
Learn more at EDGE of Existence programme

Attributes

Adult Weight [1]  1.354 lbs (614 g)
Female Weight [1]  1.433 lbs (650 g)
Male Weight [1]  1.276 lbs (579 g)
Weight Dimorphism [1]  12.3 %
Breeding Habitat [2]  Temperate western forests, Mexican highland forests
Wintering Geography [2]  Non-migrartory
Wintering Habitat [2]  Temperate western forests, Mexican highland forests
Diet [3]  Carnivore (Invertebrates), Carnivore (Vertebrates)
Diet - Ectothermic [3]  10 %
Diet - Endothermic [3]  80 %
Diet - Invertibrates [3]  10 %
Forages - Mid-High [3]  10 %
Forages - Understory [3]  20 %
Forages - Ground [3]  70 %
Clutch Size [5]  2
Clutches / Year [1]  1
Fledging [1]  35 days
Global Population (2017 est.) [2]  15,000
Incubation [4]  30 days
Maximum Longevity [4]  25 years
Nocturnal [3]  Yes
Raptor Research Conservation Priority [6]  136
Snout to Vent Length [1]  17 inches (44 cm)
Female Maturity [4]  1 year
Male Maturity [4]  1 year

Ecoregions

Protected Areas

Important Bird Areas

Name Location  IBA Criteria   Website   Climate   Land Use 
Zion National Park USA A1

Biodiversity Hotspots

Name Location Endemic Species Website
California Floristic Province Mexico, United States No
Madrean Pine-Oak Woodlands Mexico, United States No

Prey / Diet

Prey / Diet Overlap

Consumers

Parasitized by 
Capillaria falconis <Unverified Name>[12]
Centrorhynchus conspectus[12]
Centrorhynchus robustus[12]
Porrocaecum depressum[12]
Synhimantus hamatus[12]

Range Map

External References

NatureServe Explorer

Citations

Attributes / relations provided by
♦ 1Nathan P. Myhrvold, Elita Baldridge, Benjamin Chan, Dhileep Sivam, Daniel L. Freeman, and S. K. Morgan Ernest. 2015. An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles. Ecology 96:3109
♦ 2Partners in Flight Avian Conservation Assessment Database, version 2017. Accessed on January 2018.
♦ 3Hamish Wilman, Jonathan Belmaker, Jennifer Simpson, Carolina de la Rosa, Marcelo M. Rivadeneira, and Walter Jetz. 2014. EltonTraits 1.0: Species-level foraging attributes of the world's birds and mammals. Ecology 95:2027
♦ 4de Magalhaes, J. P., and Costa, J. (2009) A database of vertebrate longevity records and their relation to other life-history traits. Journal of Evolutionary Biology 22(8):1770-1774
♦ 5Jetz W, Sekercioglu CH, Böhning-Gaese K (2008) The Worldwide Variation in Avian Clutch Size across Species and Space PLoS Biol 6(12): e303. doi:10.1371/journal.pbio.0060303
♦ 6Buechley ER, Santangeli A, Girardello M, et al. Global raptor research and conservation priorities: Tropical raptors fall prey to knowledge gaps. Divers Distrib. 2019;25:856–869. https://doi.org/10.1111/ddi.12901
♦ 7Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014). Global Biotic Interactions: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics.
♦ 8Glaucomys sabrinus, Nancy Wells-Gosling and Lawrence R. Heaney, Mammalian Species No. 229, pp. 1-8 (1984)
♦ 9Clethrionomys californicus, Lois F. Alexander and B. J. Verts, MAMMALIAN SPECIES No. 406, pp. 1-6 (1992)
♦ 10Neotoma fuscipes, L. N. Carraway and B. J. Verts, MAMMALIAN SPECIES No. 386, pp. 1-10 (1991)
♦ 11Thomomys mazama, B. J. Verts and Leslie N. Carraway, MAMMALIAN SPECIES No. 641, pp. 1–7 (2000)
♦ 12Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London
Ecoregions provided by World Wide Fund For Nature (WWF). WildFinder: Online database of species distributions, ver. 01.06 Wildfinder Database
Biodiversity Hotspots provided by Critical Ecosystem Partnership Fund
Abstract provided by DBpedia licensed under a Creative Commons License
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0