Scientists aim to describe a single 'tree of life' that reflects the evolutionary relationships of living things. However, evolutionary relationships are a matter of ongoing discovery, and there are different opinions about how living things should be grouped and named. EOL reflects these differences by supporting several different scientific 'classifications'. Some species have been named more than once. Such duplicates are listed under synonyms. EOL also provides support for common names which may vary across regions as well as languages.

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Preferred marks the preferred classification for this taxon.

Recognized By Rank Classification
Species 2000 & ITIS Catalogue of Life: April 2013
view in classification
Species
Phthiraptera Species
Anage Data
Animal Diversity Web Descriptions
Avibase - IOC World Bird Names (2011)
view in classification
BHL: BioDivLibrary's photostream
BHL: BioDivLibrary's photostream
  • Cygnus olor
BOLDS images II Species
BOLDS resource for species-level taxa
BibAlex LifeDesk
  • Cygnus olor (Gmelin 1789)
BioImages resource Species
BioKIDS Critter Catalog
Biopix
Bird Life History Species
Birdlife International links resource
Birds Animal Diversity Web
CABI Invasive Species Compendium
  • Cygnus olor
CalPhotos
  • Cygnus olor
Clements Checklist resource
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Species
DiscoverLife map resource
  • Cygnus olor
EOL Group on Flickr
EOL Group on Flickr
  • Cygnus olor
EOL Group on Flickr
EOL Group on Flickr
EOL Group on Flickr
EOL Group on Flickr
EOL Group on Flickr
Environments
Taxonomic Hierarchy of COL-China 2012 Fauna Aves
GBIF Elevation Data Species
Genome 10K Project Vertebrates
  • Cygnus olor
Global Biotic Interactions Species
Gulf of Maine Area CoML resource
IUCN Red List
IUCN Red List
view in classification
BioLib.cz Import
Integrated Taxonomic Information System (ITIS)
view in classification
Species
Global Invasive Species Database (GISD)
  • Cygnus olor
Inventaire National du Patrimoine Naturel Species
Taxonomic Hierarchy of COL-China 2012 Lei Aves
MCZ resource
NCBI Taxonomy
view in classification
Species
NatureServe resource Species
OBIS Environmental Information
  • Cygnus olor J.F. Gmelin, 1789
OBIS depth range resource
One-time import of archived NBII images Species
AnAge database
PlanetScott.com images
  • Cygnus olor
SPIRE resource
  • Cygnus olor
Monthly ARKive text import
IUCN Structured Data
TaxonConcept.org outlinks
  • Cygnus olor
Taxonomic Hierarchy of COL-China 2012
view in classification
Species
Tree of Life web project
  • Cygnus olor
Vogels van het Dijleland (ruw)
  • Cygnus olor
World Register of Marine Species (WoRMS)
view in classification
Species
Wikimedia Commons
Wikipedia
iNaturalist Images Species
iSpot links Species
  • Cygnus olor
iunr - semester 1 - fauna
  • Cygnus olor
xeno-canto Bird Sounds Species

Disclaimer

EOL content is automatically assembled from many different content providers. As a result, from time to time you may find pages on EOL that are confusing.

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