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The Eurasian beaver (Castor fiber) or European beaver is a species of beaver widespread across Eurasia, with a rapidly increasing population of at least 1.5 million in 2020. The Eurasian beaver was hunted to near-extinction for both its fur and castoreum , with only about 1,200 beavers in eight relict populations from France to Mongolia in the ...
There are two extant species: the North American beaver (Castor canadensis) and the Eurasian beaver (C. fiber). The Eurasian beaver is slightly longer and has a more lengthened skull, triangular nasal cavities (as opposed to the square ones of the North American species), a lighter fur color, and a narrower tail. [11]
The beaver is the largest rodent in North America and competes with its Eurasian counterpart, the European beaver, for being the third-largest in the world, both following the South American capybara and lesser capybara. The European species is slightly larger on average but the American has a larger known maximum size.
North American beaver: Castor canadensis: Extant: 50 kg (110 lb) 5: Lesser capybara: Hydrochoerus isthmius: Extant: 45.4 kg (100 lb) 6: Eurasian beaver: Castor fiber: Extant: 40 kg (88 lb) 7: Cape porcupine: Hystrix africaeaustralis : Extant: 30 kg (66 lb) 8: Crested porcupine: Hystrix cristata : Extant: 27 kg (60 lb) 9: North American ...
1935 - Finland: in 1935, 17 Eurasian beavers were reintroduced, then two years later North American beavers sourced from New York were released. At the time, a difference between the species was unknown. Today, the North American beaver is considered an invasive species in Finland, and outnumbers Eurasian beavers 5:1.
Skull of a beaver. Castoridae is a family of rodents that contains the two living species of beavers and their fossil relatives. A formerly diverse group, only a single genus is extant today, Castor. Two other genera of "giant beavers", Castoroides and Trogontherium, became extinct in the Late Pleistocene.
While the majority of Leave It to Beaver's 234 episodes took a week to film, Mathers says that the series finale was shot entirely in one day.That's because "Family Scrapbook" was conceived as a ...
New Zealand has giardia outbreaks, but no beavers, whereas Norway has plenty of beavers, but had no giardia outbreaks until recently (in a southern part of Norway densely populated by humans but no beaver). [14] In 2011, a Eurasian beaver pair was introduced to a beaver project site in West Devon, consisting of a 4.4 acres (1.8 ha) large ...