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.

Preferred marks the preferred classification for this taxon.

Recognized By Rank Classification
Integrated Taxonomic Information System (ITIS)
view in classification
Inventaire National du Patrimoine Naturel Species
Anage Data
Animal Diversity Web Descriptions
AquaMaps Resource
Arctic mammals
BHL: BioDivLibrary's photostream
BOLDS images II Species
BOLDS resource for species-level taxa
BibAlex LifeDesk
  • Balaenoptera borealis Lesson, 1828
Biome & Ecoregion Resource Species
DiscoverLife ID keys resource
  • Balaenoptera borealis
DiscoverLife map resource
  • Balaenoptera borealis
EOL Group on Flickr
  • Balaenoptera borealis
Genome 10K Project Vertebrates
  • Balaenoptera borealis
Global Biotic Interactions Species
Gulf of Maine Area CoML resource
IABIN resource
IUCN Red List
IUCN Red List
view in classification Import
Monthly ARKive text import
AnAge database
Life History Characteristics of Placental Non-Volant Mammals-to be deleted- Species
Macroecological database of mammalian body mass-to be deleted- Species
Mammal life history
Taxonomic Hierarchy of COL-China 2012 Mammalia
Mammals Resource
MarLIN resource
Milk Chemical Data Species
NCBI Taxonomy
view in classification
NatureServe resource Species
North American Mammals Resource
OBIS Environmental Information
  • Balaenoptera borealis Lesson, 1828
OBIS depth range resource
Smithsonian type specimen data
Social systems of mammalian species-to be deleted- Species
South African Vertebrates
view in classification
Species 2000 & ITIS Catalogue of Life: April 2013
view in classification
IUCN Structured Data outlinks
Taxonomic Hierarchy of COL-China 2012
view in classification
US Fish and Wildlife Service Endangered Species Program resource
  • Balaenoptera borealis
World Register of Marine Species (WoRMS)
view in classification
Wikimedia Commons
iNaturalist Images Species


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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