Birds fly.
Birds lay eggs in nests.
Ducks can swim.
Birds come in lots of different colors.
Birds have feathers not skin.
Birds like to eat bird seed,
They sing different songs.
I had a bag with several different types of plush birds. Some even have a sound box inside that mimics the bird's call. We were able to match them to pictures of real birds by using their colorings as hints. Once that was complete the children were inspired to build bird nests for their new friends. Such a great extension of their growing imaginations.