YouTube Video
Our featured beaver documentary of the week, embedded from YouTube.
El castor: Mexico's endangered engineer
At the southern edge of its range, the beaver is a protected endangered species in Mexico, holding on along a handful of desert rivers in Sonora, Chihuahua and the Río Bravo basin.
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Beaver facts
- Northern Mexico is the southern edge of the North American beaver's range. In Mexico it lives only in Sonora, Chihuahua, Coahuila, Nuevo León and Tamaulipas.
- Mexico lists the beaver as en peligro de extinción (endangered) under NOM-059-SEMARNAT-2010, even though it is rated Least Concern worldwide.
- Dams, water extraction, grazing and trapping have split the beavers of the Río Bravo (Rio Grande) basin into small, scattered populations.
- Sonora's beavers belong to the subspecies Castor canadensis frondator. A 1999 survey found beaver sign at 14 sites along the upper Río Bavispe, among its cottonwoods and willows.
- Mexico's protected-areas commission, CONANP, runs a dedicated species action programme (PACE) for the beaver.
- In Spanish the beaver is el castor, from the same Latin root as castoreum, the scent the fur trade once prized.
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The upper Río Bavispe in Sonora, where surveys have found beaver sign along the river.
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