Animalia > Chordata > Aves > Charadriiformes > Laridae > Larus > Larus thayeri
 

Larus thayeri (Thayer's Gull)

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Wikipedia Abstract

Thayer's gull (Larus thayeri) is a large gull native to North America that breeds in the Arctic islands of Canada and winters primarily on the Pacific coast, from southern Alaska to the Gulf of California, though there are also wintering populations on the Great Lakes and the upper Mississippi River. The species has occurred as a vagrant to Japan, Denmark, and other parts of western Europe. Both the common and species names honor ornithologist John Eliot Thayer, and so the first part of its name is pronounced "THAY-erz".
View Wikipedia Record: Larus thayeri

EDGE Analysis

Uniqueness Scale: Similiar (0) 
0
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
3
 Unique & Vulnerable (100)
ED Score: 1.01529
EDGE Score: 0.700761

Attributes

Adult Weight [1]  2.20 lbs (1.00 kg)
Male Weight [5]  2.25 lbs (1.02 kg)
Breeding Habitat [2]  Arctic coastal
Wintering Geography [2]  Pacific Coast
Wintering Habitat [2]  Beaches and estuaries, Coastal marine, Freshwater lakes and rivers
Diet [3]  Carnivore (Invertebrates), Carnivore (Vertebrates), Piscivore
Diet - Fish [3]  40 %
Diet - Invertibrates [3]  30 %
Diet - Scavenger [3]  30 %
Forages - Ground [3]  20 %
Forages - Water Surface [3]  80 %
Global Population (2017 est.) [2]  18,000
Migration [4]  Intracontinental
Wing Span [1]  4.4 feet (1.35 m)

Ecoregions

Name Countries Ecozone Biome Species Report Climate Land
Use
Baja California desert Mexico Nearctic Deserts and Xeric Shrublands
British Columbia mainland coastal forests Canada, United States Nearctic Temperate Coniferous Forests
California Central Valley grasslands United States Nearctic Temperate Grasslands, Savannas, and Shrublands
California coastal sage and chaparral Mexico, United States Nearctic Mediterranean Forests, Woodlands, and Scrub
California interior chaparral and woodlands United States Nearctic Mediterranean Forests, Woodlands, and Scrub
California montane chaparral and woodlands United States Nearctic Mediterranean Forests, Woodlands, and Scrub
Central Pacific coastal forests Canada, United States Nearctic Temperate Coniferous Forests  
Davis Highlands tundra Canada Nearctic Tundra
High Arctic tundra Canada Nearctic Tundra
Klamath-Siskiyou forests United States Nearctic Temperate Coniferous Forests
Low Arctic tundra Canada Nearctic Tundra
Middle Arctic tundra Canada Nearctic Tundra
Northern California coastal forests United States Nearctic Temperate Coniferous Forests
Northern Pacific coastal forests United States Nearctic Temperate Coniferous Forests  
Puget lowland forests United States Nearctic Temperate Coniferous Forests
Queen Charlotte Islands Canada Nearctic Temperate Coniferous Forests
Sierra Nevada forests United States Nearctic Temperate Coniferous Forests
Sonoran desert Mexico, United States Nearctic Deserts and Xeric Shrublands
Willamette Valley forests United States Nearctic Temperate Broadleaf and Mixed Forests

Protected Areas

Name IUCN Category Area acres Location Species Website Climate Land Use
Aulavik National Park II 3021211 Northwest Territories, Canada
Bruce Peninsula National Park II   Ontario, Canada
Crosswinds Marsh Nature Preserve 1050 Michigan, United States
Fathom Five National Marine Park II   Ontario, Canada
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
Pacific Rim National Park Reserve II 137900 British Columbia, Canada
Point Pelee National Park II 5764 Ontario, Canada
Quttinirpaaq (Ellesmere Island) National Park Reserve II 9436606 Nunavut, Canada
Sirmilik National Park II 5475284 Canada
Tawas Point State Park 183 Michigan, United States
Tuktut Nogait National Park II 5761538 Northwest Territories, Canada
Ukkusiksalik National Park II   Nunavut, Canada
Wapusk National Park II 2614324 Manitoba, Canada

Important Bird Areas

BirdLife Species Factsheet: View Factsheet
Name Location  IBA Criteria   Website   Climate   Land Use 
Baynes Sound Canada A4i
Cowichan estuary Canada A4i
Little Qualicum Estuary to Nanoose Bay Canada A4i, A4iii
Mendenhall Wetlands USA A4i

Biodiversity Hotspots

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

Consumers

Parasitized by 
Paracuaria adunca <Unverified Name>[6]
Streptocara crassicauda <Unverified Name>[6]

Range Map

North America;

Photos

Citations

Attributes / relations provided by
1del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
2Partners in Flight Avian Conservation Assessment Database, version 2017. Accessed on January 2018.
3Hamish 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
4Myers, 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
5Snell, RR 2002: Iceland gull, Larus glaucoides, Thayer's gull, Larus thayeri. The Birds of North America (A. Poole & F. Gill eds) 699. Philadelphia: The Birds of North America, Inc.
6Gibson, 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 WWF WildFINDER
Biodiversity Hotspots provided by Critical Ecosystem Partnership Fund
Images provided by Google Image Search
Abstract provided by DBpedia licensed under a Creative Commons License
Weather provided by NOAA METAR Data Access