Animalia > Chordata > Aves > Passeriformes > Icteridae > Euphagus > Euphagus cyanocephalus

Euphagus cyanocephalus (Brewer's Blackbird)

Synonyms: Psarocolius cyanocephalus (homotypic)
Language: French; Spanish

EDGE Analysis

Uniqueness Scale: Similiar (0) 
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
 Unique & Vulnerable (100)
ED Score: 4.50384
EDGE Score: 1.70545


Adult Weight [1]  62 grams
Birth Weight [3]  4 grams
Female Weight [5]  58 grams
Male Weight [5]  67 grams
Weight Dimorphism [5]  15.5 %
Breeding Habitat [2]  Generalist, Agricultural
Wintering Geography [2]  Western U.S./Mexico
Wintering Habitat [2]  Generalist, Agricultural
Diet [4]  Carnivore (Invertebrates)
Diet - Invertibrates [4]  100 %
Forages - Ground [4]  100 %
Clutch Size [6]  5
Clutches / Year [3]  2
Fledging [1]  14 days
Global Population (2017 est.) [2]  25,000,000
Incubation [3]  13 days
Mating System [8]  Polygyny
Maximum Longevity [3]  13 years
Migration [7]  Intracontinental
Female Maturity [3]  1 year
Male Maturity [3]  1 year


Protected Areas

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Biodiversity Hotspots

Name Location Endemic Species Website
California Floristic Province Mexico, United States No
Madrean Pine-Oak Woodlands Mexico, United States No
Mesoamerica Belize, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama No

Prey / Diet


Accipiter cooperii (Cooper's Hawk)[9]
Aquila chrysaetos (Golden Eagle)[9]
Bubo virginianus (Great Horned Owl)[9]
Buteo jamaicensis (Red-tailed Hawk)[9]


Parasitized by 
Molothrus ater (Brown-headed Cowbird)[9]

Range Map

External References

NatureServe Explorer


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
5Dunning, JB, Jr. 1984. Body weights of 686 species of North American birds. Western Bird Banding Association Monograph Number 1. Eldon, Cave Creek, Arizona, USA
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
7Myers, 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
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
9Jorrit 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.
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
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset accessed via on 2023-06-13; License: CC BY 4.0