Phénacomys— faune du Québec

The eastern heather vole (Phenacomys ungava) is a small North American vole. Until recently, this species was considered to belong to the same species as the western heather vole (P. intermedius). It is also called the Ungava vole. Though some studies have indicated that P. ungava is "rare" or "uncommon," other researchers have found that the animal can be common locally, and others have suggested that the population may undergo cyclic abundance.

Description

Eastern heather voles are relatively small among vole species, measuring 11 to 15 cm (4.3 to 5.9 in) from nose to tail and weighing between 15 and 47 g (0.53 and 1.66 oz). They are very similar in appearance to the western heather vole, and can only be distinguished from them by subtle features of the coat color and the shape of the skull. The fur is long and soft. The coat is brownish with a slight yellowish wash over the back and head, with pale grey underparts and feet, and brighter, almost russet, fur on the rump and flanks. The face and snout of adults have a more pronounced yellowish cast, contrasting with the rest of the head and body. The tail is short, measuring about a quarter of the animal's total length, and is paler underneath than on the upper surface. The ears are very small, and barely visible above the long fur. Males have scent glands on their flanks, which can reach up to 28 mm (1.1 in) across. Females have eight teats.

Reproduction

Eastern heather voles breed from June to July, and produce litters of two to eight young after a gestation period of 21 days. The young are born hairless and blind, developing fur by day six, crawling by day eight, and opening their eyes by day fourteen of life. They are weaned by day seventeen, but do not reach the full adult size for over three months. Females become sexually mature four to six weeks after birth, but males do not breed during their first summer. Normally, only a single litter is born each year, but, in at least some localities, a second litter may be born in August. They live for up to four years.