not a lot of food
In the winter you would find: *ice *icicles
I'm not really sure I understand what your question means, did you mean why or how? I'll take a guess at a general answer. Winter affects all animals by the cold weather, but native animals are adapted to it, so they grow thicker coats of fur or fatten up for winter to hibernate. Foxes don't hibernate, so they are one that grows thicker fur. More important effect is how the weather changes what foods are available. Lack of food, not temperature, is what sends most migratory animals south. Animals like foxes are predators that don't migrate and they eat mostly rodents and rabbits. Some rodents hibernate in the winter, so they are harder for foxes to find and deep snow might make hunting more difficult.
If a fox scents or sees a foreign fox in his/her territory, they will either attack or try to ward them off. Very rarely will they back off - and if they do it's usually because their opponent is much stronger.
Lights
As winter is at different times of the year in different hemispheres you will have to be precise as to location and whos winter.
tinkle and tophats and turdes and tickets to a winter festival
Some things that you might find during the winter that begin with the letter N include: Nuts Nutcracker Nutmeg Noodles Nachos Noel Nestle
lake
toys
Some things you might find during winter that starts with an I include: ice, igloo, icicle
Moving during the summer instead of the winter
Moving during the summer instead of the winter