This is my one and only look at (and chance to photograph) an Arctic Hare (Lepus arcticus).
The arctic hare is distributed over the tundra regions of Greenland and the northernmost parts of Canada. Towards the south of its range, the arctic hare changes its coat colour,
moulting and growing new fur, from brown or grey in the summer to white
in the winter, like some other arctic animals including ermine and ptarmigan, enabling it to remain camouflaged as the background changes.However, the arctic hares in the far north of Canada, where summer is very short, remain white all year round.

The arctic
hare survives with a thick coat of fur and usually digs holes under the
ground or snow to keep warm and sleep. Arctic hares look like rabbits
but have shorter ears and can stand up taller, and can live/maintain
themselves in cold places unlike rabbits. They can travel together with
many other hares, sometimes huddling with dozens or more, but are
usually found alone, taking in some cases more than one partner. The
arctic hare can run up to 40 miles (64 km) per hour. Its predators include Arctic wolf, Arctic fox, and Ermine.
The arctic hare eats mainly woody plants but also dine on buds, berries, leaves and grasses. In the early summer they eat purple saxifrage.
It has a keen sense of smell and may dig for willow twigs under the
snow. When eating plants, the arctic hare likes to stand where there is
less snow to easily locate twigs or plants that fall off or lie on the
ground for it to chew on/feed on. This hare can eat meat.
There now, that last statement...."can eat meat". I was the northern-newbie on this trip. Everyone went on and on about how big, I mean BIG, these animals were. I was looking for an absolute monster, yes, a gnashing, drooling meat-eating bunny.
Wikipedia says: On average,
this species measures from 43 to 70 cm (17 to 28 in) long, not counting a
tail length of 4.5–10 cm (1.8–3.9 in). The body mass of this species is
typically between 2.5–5.5 kg (6–12 lb), though large specimens can
weigh up to 7 kg (15 lb)
Kaufman describes it as length 24", weight 10 lbs. Apparently, there is quite some variation in size.
Female hares can have up to eight baby hares called leverets. The
leverets stay within the mother's home range until they are old enough
to survive on their own
All info taken directly from Wikipedia
and
Kaufman Field Guide to Mammals of North America