Animalia > Chordata > Aves > Podicipediformes > Podicipedidae > Aechmophorus > Aechmophorus occidentalis

Aechmophorus occidentalis (Western Grebe)

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Infraspecies

Aechmophorus occidentalis ephemeralis
Aechmophorus occidentalis occidentalis

EDGE Analysis

Uniqueness Scale: Similiar (0) 
9
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
34
 Unique & Vulnerable (100)
ED Score: 18.1982
EDGE Score: 2.95482
Learn more at EDGE of Existence programme

Attributes

Clutch Size [6]  4
Clutches / Year [2]  1
Egg Length [2]  2.283 inches (58 mm)
Egg Width [2]  1.535 inches (39 mm)
Fledging [2]  70 days
Global Population (2017 est.) [3]  87,000
Incubation [4]  23 days
Mating Display [7]  Ground display
Maximum Longevity [4]  14 years
Water Biome [1]  Lakes and Ponds, Coastal
Adult Weight [2]  2.599 lbs (1.179 kg)
Birth Weight [4]  31 grams
Female Weight [2]  2.368 lbs (1.074 kg)
Male Weight [2]  2.831 lbs (1.284 kg)
Weight Dimorphism [2]  19.6 %
Breeding Habitat [3]  Freshwater marshes
Wintering Geography [3]  Western U.S./Mexico
Wintering Habitat [3]  Coastal marine, Freshwater lakes and rivers, Saline lakes
Diet [5]  Carnivore (Invertebrates), Piscivore
Diet - Fish [5]  90 %
Diet - Invertibrates [5]  10 %
Forages - Underwater [5]  100 %
Female Maturity [4]  1 year
Male Maturity [4]  1 year

Ecoregions

Protected Areas

Ecosystems

Important Bird Areas

Biodiversity Hotspots

Name Location Endemic Species Website
Atlantic Forest Argentina, Brazil, Paraguay, Uruguay No
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

Prey / Diet Overlap

Predators

Aquila chrysaetos (Golden Eagle)[10]
Haliaeetus leucocephalus (Bald Eagle)[10]

Consumers

Range Map

External References

NatureServe Explorer

Citations

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 animaldiversity.org
♦ 2Nathan 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
♦ 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
♦ 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
♦ 8Szoboszlai AI, Thayer JA, Wood SA, Sydeman WJ, Koehn LE (2015) Forage species in predator diets: synthesis of data from the California Current. Ecological Informatics 29(1): 45-56. Szoboszlai AI, Thayer JA, Wood SA, Sydeman WJ, Koehn LE (2015) Data from: Forage species in predator diets: synthesis of data from the California Current. Dryad Digital Repository.
♦ 9Food Web Relationships of Northern Puget Sound and the Strait of Juan de Fuca : a Synthesis of the Available Knowledge, Charles A. Simenstad, Bruce S. Miller, Carl F. Nyblade, Kathleen Thornburgh, and Lewis J. Bledsoe, EPA-600 7-29-259 September 1979
♦ 10Jorrit 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.
♦ 11Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London
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 https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0