Animalia > Chordata > Aves > Passeriformes > Icteridae > Agelaius > Agelaius tricolor

Agelaius tricolor (Tricolored Blackbird)

Synonyms: Icterus tricolor (homotypic)
Language: Spanish

Wikipedia Abstract

The tricolored blackbird (Agelaius tricolor) is a passerine bird of the family Icteridae. Its range is limited to the coastal areas of the Pacific coast of North America, from Northern California in the U.S. (with occasional strays into Oregon), to upper Baja California in Mexico. This highly social and gregarious bird forms the largest colonies of any North American landbird, with a single breeding colony often consisting of tens of thousands of birds. Despite the similar names, this bird is not related to the Old World common blackbird, which is a thrush (Turdidae).
View Wikipedia Record: Agelaius tricolor

Endangered Species

Status: Endangered
View IUCN Record: Agelaius tricolor

EDGE Analysis

Uniqueness Scale: Similiar (0) 
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
 Unique & Vulnerable (100)
ED Score: 4.79771
EDGE Score: 3.83691


Adult Weight [1]  58 grams
Birth Weight [3]  3 grams
Female Weight [1]  49 grams
Male Weight [1]  68 grams
Weight Dimorphism [1]  38.8 %
Breeding Habitat [2]  Freshwater marshes, Agricultural
Wintering Geography [2]  Western U.S.
Wintering Habitat [2]  Freshwater marshes, Agricultural
Diet [4]  Carnivore (Invertebrates), Granivore
Diet - Invertibrates [4]  70 %
Diet - Seeds [4]  30 %
Forages - Ground [4]  100 %
Clutch Size [5]  4
Clutches / Year [3]  2
Fledging [1]  12 days
Global Population (2017 est.) [2]  300,000
Incubation [3]  11 days
Mating Display [6]  Ground display
Mating System [6]  Polygyny
Maximum Longevity [3]  13 years
Female Maturity [1]  1 year
Male Maturity [1]  2 years


Protected Areas

Important Bird Areas

Name Location  IBA Criteria   Website   Climate   Land Use 
San Pasqual Valley USA A1
Santa Ana River Valley USA A1
Santa Clara River Valley USA A1

Biodiversity Hotspots

Name Location Endemic Species Website
California Floristic Province Mexico, United States No

Range Map

External References

NatureServe Explorer


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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
5Jetz 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
6Terje Lislevand, Jordi Figuerola, and Tamás Székely. 2007. Avian body sizes in relation to fecundity, mating system, display behavior, and resource sharing. Ecology 88:1605
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
Audio software provided by SoundManager 2
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset accessed via on 2023-06-13; License: CC BY 4.0