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Slekta hører til i familien bevere, Castoridae.
Amerikabever, Castor canadensis "Untitled" by Minette Layne via Flickr, Creative Commons Attribution ShareAlike. | Bever, Castor fiber "Praying for a Sunny Weekend.....(Happy Furry Friday.:O))" by Law_keven via Flickr, Creative Commons Attribution ShareAlike. |