Sometimes it is good to consider some of the most familiar things in life that we take for granted, like the Chickadee.
This cute little non-migratory northern bird is known to everyone, especially from his wintertime visits to bird feeders, where he prefers sunflower seeds. He can be easily habituated to take seeds off of your palm if you stand still and have some patience.
Most of the time, though, he eats bugs and bug larvae by foraging through leaves and bark in woods and woodland edges. How often do you see them in the summertime? They are still here. They will nest in any little secret hiding place or tree-hole, and will use small nest-boxes. They are loyal to their mates, probably 'til death.
They are known to hide food for later, and supposedly are able to find it. Their typical "chickadee-dee-dee" call is replaced, in springtime, with a sweet "fee-beeee" which we will begin to hear as the days grow longer.
You can learn more about these delightful birds here and here.