Winter is quite a challenge for Wild boar Sus scrofa. When snow layer reaches 30-40 cm the ability to walk and find food lowers. This is why wild boars try not to walk around very much and sleep close to their feeding ground. They beat a path to ease walking between feeding ground and their sleeping place. Wild boars have to dig up ground to have something to eat so it is very important that ground is not frozen like it is this winter. If they try to dig up very frozen ground there are possibility that they will break their tusks. Even unfrozen ground is not easy to dig as they have to tear or bite some bigger roots to get to the food.
Wild boar males are solitary outside breeding season while females live in groups. In one group or sounder there can be several sows with their offsprings, their daughters and infertile pigs. Adult boars dig up some area where piglets can search for food afterwards. If piglets would have to dig through the snow themselves they would waste too much energy and die.
Forest soil contains vast range of edible things: roots, rhizomes, larva and earthworms; also they eat shrews and mouse-like rodents. If ground is not frozen, earthworms, which are very nourishing food, live near surface. Moles make earthworm reserves. When Wild boar finds these reserves it is like winning a lottery, and if the collector itself gets in its way it is a true windfall. Wild boars sometimes feed on carrion. Adult boars are more important for population so they eat first. Piglets are sent off, if they are too intrusive. Piglets know that, so they try to get something to eat few meters away from adults. This means that it is easier for predators to catch these less important piglets than relevant adults.
Wild boars prepare very warm lairs in winter. Especially soft lairs are for sows. They use fir branches, small firs, heathers, bilberry bush, reed and dry grass to build it. These warm lairs help piglets stay warm and not waste their energy.

httpv://www.youtube.com/watch?v=VbjmZFv3mxY