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
IUCN Red List
view in classification
Animal Diversity Web Descriptions
BHL: BioDivLibrary's photostream
BOLDS images II Species
BOLDS resource for species-level taxa
BioKIDS Critter Catalog
Biopix
CalPhotos
  • Ursus americanus
Chiricahua National Monument - Plants
  • Ursus americanus
Conabio
DiscoverLife ID keys resource
  • Ursus americanus
DiscoverLife map resource
  • Ursus americanus
EOL Group on Flickr
EOL Group on Flickr
EOL Group on Flickr
EOL Group on Flickr
Environments
FEIS Invasiveness (structured data)
  • Ursus americanus
Fire Effects Information System (FEIS) - Animals
Genome 10K Project Vertebrates
  • Ursus americanus
Global Biotic Interactions Species
IUCN Red List
Anage Data
BioLib.cz Import
Integrated Taxonomic Information System (ITIS)
view in classification
Species
Mammal life history
Mammals Resource
NCBI Taxonomy
view in classification
Species
NatureServe resource Species
North American Mammals Resource
One-time import of archived NBII images Species
Paleobiology Database
view in classification
Species
PlanetScott.com images
  • Ursus americanus
SI Wild Photostream
SPIRE resource
  • Ursus americanus
Southeast Arizona Group Chiricahua NM
  • Ursus americanus
Southeast Arizona Group Coronado NMem
  • Ursus americanus
Southeast Arizona Group Fort Bowie NHS
  • Ursus americanus
AnAge database
IUCN Structured Data
TaxonConcept.org outlinks
  • Ursus americanus
The Coronado National Memorial - Plants
  • Ursus americanus
US Fish and Wildlife Service Endangered Species Program resource
  • Ursus americanus
Wikimedia Commons
Wikipedia
iNaturalist Images 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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