Animalia > Chordata > Aves > Strigiformes > Strigidae > Strix > Strix aluco

Strix aluco (Tawny Owl)

Synonyms: Strix stridula; Syrnium stridulum

Wikipedia Abstract

The tawny owl or brown owl (Strix aluco) is a stocky, medium-sized owl commonly found in woodlands across much of Eurasia. Its underparts are pale with dark streaks, and the upperparts are either brown or grey. Several of the eleven recognised subspecies have both variants. The nest is typically in a tree hole where it can protect its eggs and young against potential predators. This owl is non-migratory and highly territorial. Many young birds starve if they cannot find a vacant territory once parental care ceases.
View Wikipedia Record: Strix aluco

Infraspecies

Strix aluco aluco (Eurasian tawny owl)
Strix aluco biddulphi
Strix aluco harmsi
Strix aluco mauritanica
Strix aluco sanctinicolai
Strix aluco siberiae
Strix aluco sylvatica (European tawny owl)
Strix aluco willkonskii

EDGE Analysis

Uniqueness Scale: Similiar (0) 
4
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
24
 Unique & Vulnerable (100)
ED Score: 9.07594
EDGE Score: 2.31015
Learn more at EDGE of Existence programme

Attributes

Adult Weight [1]  1.091 lbs (495 g)
Birth Weight [2]  28 grams
Female Weight [5]  1.155 lbs (524 g)
Male Weight [5]  426 grams
Weight Dimorphism [5]  23 %
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]  10 %
Forages - Ground [3]  70 %
Forages - Water Surface [3]  10 %
Clutch Size [7]  3
Clutches / Year [8]  1
Fledging [2]  31 days
Incubation [6]  29 days
Mating Display [9]  Ground and non-acrobatic aerial display
Mating System [9]  Monogamy
Maximum Longevity [4]  22 years
Nocturnal [3]  Yes
Raptor Research Conservation Priority [10]  159
Snout to Vent Length [2]  16 inches (41 cm)
Wing Span [8]  39 inches (.99 m)
Female Maturity [4]  1 year
Male Maturity [4]  1 year

Ecoregions

Protected Areas

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Ecosystems

Important Bird Areas

Biodiversity Hotspots

Prey / Diet

Prey / Diet Overlap

Providers

Shelter 
Fagus sylvatica (European beech)[11]

Consumers

Range Map

External References

Audio

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Provided by Xeno-canto under a Creative Commons BY-NC-ND 2.5 License Author: Niels Krabbe

Citations

Attributes / relations provided by
♦ 1Storchová, Lenka; Hořák, David (2018), Data from: Life-history characteristics of European birds, Dryad, Dataset, https://doi.org/10.5061/dryad.n6k3n
♦ 2Nathan 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
♦ 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
♦ 5Cramp, S.; Simmons, K.E.L.; Perrins, C.M. 1977-1994. Handbook of the birds of Europe, the Middle East and North Africa Vols 1-9. Oxford University Press, Oxford.
♦ 6Kemp, AC. 1989. Estimation of Biological Indices for Little-known African Owls Meyburg, B.-U & R. D. Chancellor eds. 1989 Raptors in the Modern World WWGBP: Berlin, London & Paris
♦ 7Jetz 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
♦ 8British Trust for Ornithology
♦ 9Terje Lislevand, Jordi Figuerola, and Tamás Székely. 2007. Avian body sizes in relation to fecundity, mating system, display behavior, and resource sharing. Ecology 88:1605
♦ 10Buechley 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
♦ 11Ecology of Commanster
♦ 12Barbastella barbastellus, Jens Rydell and Wiesław Bogdanowicz, MAMMALIAN SPECIES No. 557, pp. 1-8 (1997)
♦ 13Jorrit 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.
♦ 14Eptesicus nilssonii, Jens Rydell, MAMMALIAN SPECIES No. 430, pp. 1-7 (1993)
♦ 15Glis glis (Rodentia: Gliridae), BORIS KRYSTUFEK, MAMMALIAN SPECIES 42(865):195–206 (2010)
♦ 16Myocastor coypus, Charles A. Woods, Luis Contreras, Gale Willner-Chapman, and Howard P. Whidden, MAMMALIAN SPECIES No. 398, pp. 1-8 (1992)
♦ 17Vespertilio murinus, Jens Rydell and Hans J. Baagøe, MAMMALIAN SPECIES No. 467, pp. 1-6 (1994)
♦ 18Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London
♦ 19International Flea Database
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
Audio software provided by SoundManager 2
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