Animalia > Chordata > Aves > Strigiformes > Strigidae > Aegolius > Aegolius acadicus

Aegolius acadicus (Northern Saw-whet Owl)

Synonyms: Cryptoglaux acadica; Strix acadica
Language: French; Spanish

Wikipedia Abstract

The northern saw-whet owl (Aegolius acadicus) is a small owl native to North America.
View Wikipedia Record: Aegolius acadicus

Infraspecies

Aegolius acadicus acadicus (Northern saw-whet owl)
Aegolius acadicus brooksi (Queen Charlotte saw-whet owl)

EDGE Analysis

Uniqueness Scale: Similiar (0) 
7
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
31
 Unique & Vulnerable (100)
ED Score: 15.3982
EDGE Score: 2.79717
Learn more at EDGE of Existence programme

Attributes

Adult Weight [1]  104 grams
Birth Weight [3]  8 grams
Female Weight [5]  131 grams
Male Weight [5]  77 grams
Weight Dimorphism [5]  70.1 %
Breeding Habitat [2]  Forests
Wintering Geography [2]  Widespread U.S.
Wintering Habitat [2]  Forests
Diet [4]  Carnivore (Invertebrates), Carnivore (Vertebrates)
Diet - Endothermic [4]  80 %
Diet - Invertibrates [4]  20 %
Forages - Understory [4]  10 %
Forages - Ground [4]  90 %
Clutch Size [6]  6
Clutches / Year [3]  1
Fledging [1]  30 days
Global Population (2017 est.) [2]  2,000,000
Incubation [3]  27 days
Mating Display [7]  Ground display
Maximum Longevity [3]  18 years
Nocturnal [8]  Yes
Raptor Research Conservation Priority [9]  124
Snout to Vent Length [1]  7 inches (18 cm)
Wing Span [10]  20 inches (.5 m)
Female Maturity [3]  1 year
Male Maturity [3]  1 year

Ecoregions

Protected Areas

+ Click for partial list (100)Full list (133)

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

Predators

Accipiter cooperii (Cooper's Hawk)[18]
Accipiter gentilis (Northern Goshawk)[18]
Asio flammeus (Short-eared Owl)[18]
Bubo virginianus (Great Horned Owl)[8]
Buteo jamaicensis (Red-tailed Hawk)[18]

Consumers

Parasitized by 
Baruscapillaria falconis[19]
Ceratophyllus niger (Western chicken flea)[20]
Orchopeas leucopus (rodent flea)[20]

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.
♦ 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
♦ 4Hamish 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
♦ 5Cannings, RJ 1993. Northern Saw-whet Owl (Aegolius acadicus). In The Birds of North America, no. 42 (A. Poole and F. Gill, Eds.). Academy of Natural Sciences, Philadelphia, and American Ornithologists' Union, Washington, DC.
♦ 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
♦ 7Terje Lislevand, Jordi Figuerola, and Tamás Székely. 2007. Avian body sizes in relation to fecundity, mating system, display behavior, and resource sharing. Ecology 88:1605
♦ 8Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2006. The Animal Diversity Web (online). Accessed February 01, 2010 at animaldiversity.org
♦ 9Buechley 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
♦ 10Wing Loading in 15 Species of North American Owls, Duncan, James R.; Johnson, David H.; Nicholls, Thomas H., eds. Biology and conservation of owls of the Northern Hemisphere: 2nd International symposium. Gen. Tech. Rep. NC-190. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station. 553-561 (1997)
♦ 11DIET OF NORTHERN SAW-WHET OWLS IN SOUTHERN WISCONSIN, SCOTT R. SWENGEL AND ANN B. SWENGEL, The Condor 94:707-711 (1992)
♦ 12Microtus canicaudus, B. J. Verts and Leslie N. Carraway, MAMMALIAN SPECIES No. 267, pp. 1-4 (1987)
♦ 13DIETS OF NORTHERN PYGMY-OWLS AND NORTHERN SAW-WHET OWLS IN WEST-CENTRAL MONTANA, DENVER W. HOLT AND LESLIE A. LEROUX, Wilson Bull., 108(1), 1996, pp. 123-128
♦ 14Microtus oregoni, Leslie N. Carraway and B. J. Verts, Mammalian Species No. 233, pp. 1-6 (1985)
♦ 15Clethrionomys californicus, Lois F. Alexander and B. J. Verts, MAMMALIAN SPECIES No. 406, pp. 1-6 (1992)
♦ 16Neurotrichus gibbsii, L. N. Carraway and B. J. Verts, MAMMALIAN SPECIES No. 387, pp. 1-7 (1991)
♦ 17Sorex vagrans, Scott W. Gillihan and Kerry R. Foresman, MAMMALIAN SPECIES No. 744, pp. 1–5 (2004)
♦ 18Jorrit 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.
♦ 19Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London
♦ 20International 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
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