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
Integrated Taxonomic Information System (ITIS)
view in classification
Species
Animal Diversity Web Descriptions
BOLDS resource for species-level taxa
CalPhotos
  • Agkistrodon contortrix
DiscoverLife ID keys resource
  • Agkistrodon contortrix
DiscoverLife map resource
  • Agkistrodon contortrix
EOL Group on Flickr
  • Agkistrodon contortrix
EOL Group on Flickr
Environments
Genome 10K Project Vertebrates
  • Agkistrodon contortrix
Global Biotic Interactions Species
Herpetology Resource
IUCN Red List
IUCN Red List
view in classification
BioLib.cz Import
Anage Data
JELA 704 Species
  • Agkistrodon contortrix
JELA Adjusted List 2 for BioBlitz
  • Agkistrodon contortrix
JELA All Categories Full Species List January 2013
  • Agkistrodon contortrix
Jean Lafitte National Historic Park and Preserve Species List
  • Agkistrodon contortrix
NCBI Taxonomy
view in classification
Species
NatureServe resource Species
Public Health Image Library Resource
  • Agkistrodon contortrix
SPIRE resource
  • Agkistrodon contortrix
AnAge database
IUCN Structured Data
TaxonConcept.org outlinks
  • Agkistrodon contortrix
The Reptile Database
view in classification
Wikimedia Commons
Wikipedia
iNaturalist Images Species

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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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