Sure, here are some common characteristics of birds:

  1. Feathers: All birds have feathers, which are modified scales that provide insulation, protection, and the ability to fly.

  2. Wings: Birds are the only animals with wings, which enable them to fly and glide through the air.

  3. Beak: Birds have a beak instead of teeth, which is adapted to their diet and allows them to pick up and manipulate food.

  4. Hollow Bones: Birds have lightweight, hollow bones that make it easier for them to fly and move through the air.

  5. Warm-blooded: Birds are endothermic or warm-blooded, meaning that they can regulate their body temperature, allowing them to live in a wide range of environments.

  6. Egg-laying: Birds lay eggs, which are incubated until hatching.

  7. Strong Muscles: Birds have strong chest muscles that are responsible for powering their wings during flight.

  8. Good Eyesight: Birds have excellent vision, which helps them to find food, avoid predators, and navigate during migration.

  9. Unique calls and songs: Birds have a wide range of vocalizations, including calls and songs, that are used for communication, attracting mates, and establishing territories.

  10. Adaptability: Birds are highly adaptable and can live in a variety of environments, from tropical rainforests to deserts, and from high mountains to deep oceans.