Samson in the Snow — Philip C. Stead

One sunny day Samson, a large and friendly woolly mammoth, encounters a little red bird who is looking for yellow flowers for her mouse friend (whose favorite color is yellow). As she flies off with the flowers, Samson wonders what it must be like to have a friend. He wonders this for so long, in fact, that he falls asleep and wakes up to a world covered in snow. In the midst of a blizzard, Samson finds and shelters the little red bird and flower-loving mouse in a tender tale of kindness and unexpected friendship.