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

Strix aluco (Tawny Owl)

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

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

Attributes

Adult Weight [1]  1.054 lbs (478 g)
Birth Weight [1]  28 grams
Female Weight [4]  1.155 lbs (524 g)
Male Weight [4]  426 grams
Weight Dimorphism [4]  23 %
Diet [2]  Carnivore (Invertebrates), Carnivore (Vertebrates)
Diet - Ectothermic [2]  10 %
Diet - Endothermic [2]  80 %
Diet - Invertibrates [2]  10 %
Forages - Mid-High [2]  10 %
Forages - Understory [2]  10 %
Forages - Ground [2]  70 %
Forages - Water Surface [2]  10 %
Clutch Size [6]  3
Clutches / Year [7]  1
Fledging [1]  31 days
Incubation [5]  29 days
Mating Display [8]  Ground and non-acrobatic aerial display
Mating System [8]  Monogamy
Maximum Longevity [3]  22 years
Nocturnal [2]  Yes
Snout to Vent Length [1]  16 inches (41 cm)
Wing Span [7]  39 inches (.99 m)
Female Maturity [3]  1 year
Male Maturity [3]  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)[9]

Consumers

Institutions (Zoos, etc.)

Range Map

Distribution

External References

Audio

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Photos

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
2Hamish 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
3de 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
4Cramp, 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.
5Kemp, 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
6Jetz 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
7British Trust for Ornithology
8Terje Lislevand, Jordi Figuerola, and Tamás Székely. 2007. Avian body sizes in relation to fecundity, mating system, display behavior, and resource sharing. Ecology 88:1605
9Ecology of Commanster
10Barbastella barbastellus, Jens Rydell and Wiesław Bogdanowicz, MAMMALIAN SPECIES No. 557, pp. 1-8 (1997)
11Jorrit 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.
12Eptesicus nilssonii, Jens Rydell, MAMMALIAN SPECIES No. 430, pp. 1-7 (1993)
13Glis glis (Rodentia: Gliridae), BORIS KRYSTUFEK, MAMMALIAN SPECIES 42(865):195–206 (2010)
14Myocastor coypus, Charles A. Woods, Luis Contreras, Gale Willner-Chapman, and Howard P. Whidden, MAMMALIAN SPECIES No. 398, pp. 1-8 (1992)
15Vespertilio murinus, Jens Rydell and Hans J. Baagøe, MAMMALIAN SPECIES No. 467, pp. 1-6 (1994)
16Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London
17International Flea Database
Ecoregions provided by World Wide Fund For Nature (WWF). WildFinder: Online database of species distributions, ver. 01.06 WWF WildFINDER
Protected Areas provided by Biological Inventories of the World's Protected Areas in cooperation between the Information Center for the Environment at the University of California, Davis and numerous collaborators.
Natura 2000, UK data: © Crown copyright and database right [2010] All rights reserved. Ordnance Survey Licence number 100017955
GBIF Global Biodiversity Information Facility
Biodiversity Hotspots provided by Critical Ecosystem Partnership Fund
Images provided by Wikimedia Commons licensed under a Creative Commons License
Abstract provided by DBpedia licensed under a Creative Commons License
Audio software provided by SoundManager 2