There is lightness in being a beginner. Don't weigh it down with the heaviness of success.
-- Steve Jobs
Chestnut-backed Chickadee, Poecile rufescens, in birch trees during late autumn. Small Birds have an amazing ability to stay warm in winter. They puff up their feathers
and some huddle together to stay warm. In winter, non-migratory northern birds store more energy as lipid triglycerides to stay warm. The increased fat gives them the energy to generate heat by shivering. They also have something called non-shivering thermogenesis that generates heat in the bird’s skeletal muscles. Palo Alto, CA