From Biology News Net:
A strikingly unusual animal was recently discovered in the cloud-forests of Peru.
The large rodent is about the size of a squirrel and looks a bit like one, except its closest relatives are spiny rats.
The nocturnal, climbing rodent is beautiful yet strange looking, with long dense fur, a broad blocky head, and thickly furred tail.
A blackish crest of fur on the crown, nape and shoulders add to its distinctive appearance.
See also here.
Cloud forest in Peru: here.
The Golden Vizcacha Rat, Pipanacoctomys aureus, is listed as ‘Critically Endangered’ on the IUCN Red List of Threatened Species™. It is known only from one small area at Salar de Pipanaco in the Catamarca province, Argentina, where it inhabits a narrow band of halophytic (salt-tolerant) plant habitat, and specializes on feeding on the halophytic plants: here.
Water voles in Britain: here.