# adder

> species of snake belonging to the viper family (Viperidae)

**Wikidata**: [Q192056](https://www.wikidata.org/wiki/Q192056)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Adder)  
**Source**: https://4ort.xyz/entity/adder


## References

1. Integrated Taxonomic Information System. 2004
2. Reptile Database. 2015
3. The IUCN Red List of Threatened Species 2022.2
4. IUCN Red List
5. Freebase Data Dumps. 2013
6. Taxonomy database of the U.S. National Center for Biotechnology Information
7. [BioLib](https://www.biolib.cz/cz/taxon/id378/)
8. Fossilworks
9. Global Biodiversity Information Facility
10. [The Life-History of British Serpents and Their Local Distribution in the British Isles](https://books.google.com/books?id=7i_8ZmymfMoC)
11. BBC Things
12. ARKive
13. [Finnish Biodiversity Information Facility](https://laji.fi/taxon/MX.37641)
14. [Portál informačního systému ochrany přírody](https://portal.nature.cz/publik_syst/nd_nalez-public.php?idTaxon=40848)
15. [Belgian Species List](http://species.be/en/2384)
16. Encyclopedia of Soviet Lithuania
17. list of endangered and protected species of China
18. Fauna Europaea
19. Dyntaxa
20. Animal Diversity Web
21. YSO-Wikidata mapping project
22. Morphology and evolution of the snake cornea
23. TAXREF v9.0
24. TAXREF v10.0
25. TAXREF v11.0
26. TAXREF v12.0
27. TAXREF v13.0
28. National Biodiversity Network
29. Nederlands Soortenregister
30. [Portál informačního systému ochrany přírody](https://portal.nature.cz/redlist/v_nd_taxon_category.php)
31. Ocean Biodiversity Information System
32. eBiodiversity
33. Belgian Species List
34. [Source](https://encyklopedia.pwn.pl/haslo/zmija-zygzakowata;4003014.html)
35. Finnish Biodiversity Information Facility
36. A neglected life‐history trait: clutch‐size variance in snakes
37. National Library of Israel Names and Subjects Authority File
38. GF WordNet
39. Open Tree of Life reference taxonomy version 3.6
40. Naturbasen
41. CalPhotos