Animalia > Chordata > Aves > Passeriformes > Corvidae > Corvus > Corvus caurinus

Corvus caurinus (Northwestern Crow)

Wikipedia Abstract

The northwestern crow (Corvus caurinus) is an all-black passerine bird of the crow genus native to the northwest of North America. It is very similar to the more western forms of the widespread American crow (Corvus brachyrhynchos), but it averages slightly smaller (33–41 cm in length) with proportionately smaller feet and a slightly more slender bill. This taxon is reliably identified by range only.
View Wikipedia Record: Corvus caurinus

EDGE Analysis

Uniqueness Scale: Similiar (0) 
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
 Unique & Vulnerable (100)
ED Score: 2.58417
EDGE Score: 1.27653


Adult Weight [2]  391 grams
Birth Weight [4]  14 grams
Female Weight [2]  368 grams
Male Weight [2]  415 grams
Weight Dimorphism [2]  12.8 %
Female Maturity [4]  2 years
Male Maturity [4]  2 years
Breeding Habitat [3]  Temperate western forests
Wintering Geography [3]  Non-migrartory
Wintering Habitat [3]  Temperate western forests
Diet [5]  Carnivore (Invertebrates), Carnivore (Vertebrates), Piscivore, Frugivore
Diet - Endothermic [5]  10 %
Diet - Fish [5]  10 %
Diet - Fruit [5]  30 %
Diet - Invertibrates [5]  30 %
Diet - Scavenger [5]  20 %
Forages - Understory [5]  20 %
Forages - Ground [5]  80 %
Clutch Size [6]  5
Clutches / Year [4]  1
Global Population (2017 est.) [3]  770,000
Incubation [4]  18 days
Maximum Longevity [4]  17 years
Water Biome [1]  Coastal


Name Countries Ecozone Biome Species Report Climate Land
Alaska Peninsula montane taiga United States Nearctic Boreal Forests/Taiga
Alaska-St. Elias Range tundra United States Nearctic Tundra
British Columbia mainland coastal forests Canada, United States Nearctic Temperate Coniferous Forests
Cascade Mountains leeward forests Canada, United States Nearctic Temperate Coniferous Forests
Central Pacific coastal forests Canada, United States Nearctic Temperate Coniferous Forests  
Cook Inlet taiga United States Nearctic Boreal Forests/Taiga
Copper Plateau taiga United States Nearctic Boreal Forests/Taiga
Northern Pacific coastal forests United States Nearctic Temperate Coniferous Forests  
Pacific Coastal Mountain icefields and tundra Canada, United States Nearctic Tundra
Puget lowland forests United States Nearctic Temperate Coniferous Forests
Queen Charlotte Islands Canada Nearctic Temperate Coniferous Forests

Protected Areas

Name IUCN Category Area acres Location Species Website Climate Land Use
Glacier Bay National Park and Preserve Ib 591068 Alaska, United States
Gulf Islands National Park National Park Reserve II 8785 British Columbia, Canada
Gwaii Haanas National Park Reserve II 366714 British Columbia, Canada
Olympic Biosphere Reserve II 922805 Washington, United States
Pacific Rim National Park Reserve II 137900 British Columbia, Canada
San Juan Island National Historical Park III 1674 Washington, United States

Range Map

North America;



Attributes / relations provided by
1Myers, 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
2Johnston DW & Williamson FSL (1960) Heart weights of North American crows and ravens. Wilson Bull. 72, 248-252
3Partners in Flight Avian Conservation Assessment Database, version 2017. Accessed on January 2018.
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
5Hamish 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
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
Ecoregions provided by World Wide Fund For Nature (WWF). WildFinder: Online database of species distributions, ver. 01.06 WWF WildFINDER
Images provided by Google Image Search
Abstract provided by DBpedia licensed under a Creative Commons License
Weather provided by NOAA METAR Data Access