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

Aegolius acadicus (Northern Saw-whet Owl)

Synonyms: 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 brodkorbi
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
Snout to Vent Length [1]  7 inches (18 cm)
Wing Span [9]  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

Habitat Vegetation Classification

Name Location  Website 
Fraser Fir Forest (Deciduous Shrub Type) United States (Tennessee, North Carolina, Virginia)
Fraser Fir Forest (Evergreen Shrub Type) United States (North Carolina, Tennessee)
Montane Red Spruce - Fir Forest United States (New Hampshire, Massachusetts, New York, Vermont, Maine); Canada (New Brunswick)
Northeast Red Maple Acidic Swamp Forest Canada; United States (New Hampshire, New York, Pennsylvania, New Jersey, Vermont)
Northern Hardwood Forest Canada (New Brunswick); United States (Maine, Vermont, Massachusetts, New Hampshire, New York)
Red Spruce - Fraser Fir Forest (Deciduous Shrub Type) United States (West Virginia, Tennessee, Virginia, North Carolina)
Red Spruce - Fraser Fir Forest (Evergreen Shrub Type) United States (Virginia, North Carolina, Tennessee)
Red Spruce Forest (Central Appalachian Upland Type) United States (Virginia, West Virginia)
Transitional Northern Hardwood Forest Canada (Ontario); United States (Pennsylvania, New York, Massachusetts, New Jersey)

Prey / Diet

Prey / Diet Overlap

Predators

Accipiter cooperii (Cooper's Hawk)[17]
Accipiter gentilis (Northern Goshawk)[17]
Asio flammeus (Short-eared Owl)[17]
Bubo virginianus (Great Horned Owl)[8]
Buteo jamaicensis (Red-tailed Hawk)[17]

Consumers

Parasitized by 
Baruscapillaria falconis[18]
Ceratophyllus niger (Western chicken flea)[19]
Orchopeas leucopus (rodent flea)[19]

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
♦ 9Wing 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)
♦ 10DIET OF NORTHERN SAW-WHET OWLS IN SOUTHERN WISCONSIN, SCOTT R. SWENGEL AND ANN B. SWENGEL, The Condor 94:707-711 (1992)
♦ 11Microtus canicaudus, B. J. Verts and Leslie N. Carraway, MAMMALIAN SPECIES No. 267, pp. 1-4 (1987)
♦ 12DIETS 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
♦ 13Microtus oregoni, Leslie N. Carraway and B. J. Verts, Mammalian Species No. 233, pp. 1-6 (1985)
♦ 14Clethrionomys californicus, Lois F. Alexander and B. J. Verts, MAMMALIAN SPECIES No. 406, pp. 1-6 (1992)
♦ 15Neurotrichus gibbsii, L. N. Carraway and B. J. Verts, MAMMALIAN SPECIES No. 387, pp. 1-7 (1991)
♦ 16Sorex vagrans, Scott W. Gillihan and Kerry R. Foresman, MAMMALIAN SPECIES No. 744, pp. 1–5 (2004)
♦ 17Jorrit 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.
♦ 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
Species taxanomy provided by GBIF Secretariat (2019). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2020-03-21; License: CC BY 4.0