Castor canadensis Kuhl, 1820

English North American beaver, Canadian beaver ISEIA: B1 – Watch List
Lëtzebuergesch Kanadësche Biwer 1 EASIN
Français Castor du Canada Wikipedia: Wikipedia - English - North American beaver Wikipedia - Français - Castor du Canada Wikipedia - Deutsch - Kanadischer Biber Wikipedia - Nederlands - Canadese bever
Deutsch Kanadischer Biber Wikispecies: Wikispecies - Castor canadensis
Nederlands Canadese bever Back to the list of vertebrates

Report the species

Report Castor canadensis to the National Museum of Natural History.

Importance and distribution in Luxembourg

The North American beaver has not been documented in the Recorder database but its presence in Luxembourg has been confirmed. Actions are taken to eliminate the Canadian beaver in order to limit its negative impacts on the fragile population of Castor fiber in Luxembourg.

Like the European beaver, the Canadian beaver lives in riparian zones, rivers and lakes, usually included in a forest matrix providing food and building material. Lodges may be completely surrounded by water or built on the banks of streams and lakes. The Canadian beaver has a greater ecological flexibility – it survives better under severe climatic conditions and adapts more easily to substitute foods than its Eurasian counterpart. Castor canadensis is likely to outcompete the native Castor fiber due to higher reproductive output. It is a more active builder of dams and lodges and regulates hydrological regimes of water bodies better than C. fiber. The two species do not hybridize due to a difference in chromosome numbers.

Risk assessment

ISEIA protocol: B1 (3+3+2+1) = Watch List (Ries et al. 2014: 199).

Bibliography concerning Luxembourg

    • Pir, J.B. & L. Schley, 2015. Développement des connaissances sur la répartition et l’écologie des mammifères au Luxembourg entre 1990 et 2015. Bull. Soc. Nat. luxemb. 116: 437-455.
    • Ries, C., M. Pfeiffenschneider, Engel, E., J.-C. Heidt & M. Lauff, 2014. Environmental impact assessment and black, watch and alert list classification after the ISEIA Protocol of vertebrates in Luxembourg. Bull. Soc. Nat. luxemb. 115: 195-201. [PDF 247 KB]
    • Wörterbuchkommission (Hrsg.), 1987. Luxemburger Wörterbuch. 5 Bd. Im Auftrag der Grossherzoglichen Luxemburgischen Regierung. Linden, Luxemburg.

Suggested citation of this webpage

Ries, C. & M. Pfeiffenschneider (Eds.), 2019. Castor canadensis Kuhl, 1820. In: - Invasive Alien Species in Luxembourg. URL: [21.08.2019].

 Last updated on Friday, April 13, 2018.