What did they eat in winter?

The ground is frozen and covered with snow. Even partridgeberries are hard to find. To gather anything in quantity, you'd have to have memorized or marked locations in the fall. Yet people lived on this land for thousands of years. Was this just a hungry month? Did they store up huge quantities of nuts like the squirrels do? Did they live on meat alone? During the colonial periods, the local Abenaki probably lived on stores of corn and beans. But what about before agriculture arrived in New England? What did they eat then? As for me, I am grateful to live in a world of seemingly infinite food abundance. Last weekend, I was even eating strawberries!! It seems almost obscene.