1.   How did the caribou first find their winter refuge?

2.   Elizabeth periodically worries about the plight of the homeless who take winter refuge on steam grates outside the federal office buildings.

3.   Every year monarchs brave gales and downpours to fly from their summer haunts in Canada all the way across the United States to a winter refuge in central Mexico.

4.   Two other treasures constitute winter refuges, the greenhouses at Lyman Estate in Waltham and at Wellesley College.