The American Tree Sparrow is also called the winter sparrow. This is because they breed and spend winter in the tundra or the northern limits of the boreal forest in Alaska and northern Canada. I photographed this one at #North Pond in #Chicago, #Illinois. https://t.co/bR9nP54O6LThe American Tree Sparrow is also called the winter sparrow. This is because they breed and spend winter in the tundra or the northern limits of the boreal forest in Alaska and northern Canada. I 2518460 The American Tree Sparrow is also called the winter sparrow.