Interesting facts about birds

Birds have feathers,wings,lays eggs and are warm blooded.There are around 1000 different species worldwide.The Ostrich is the largest bird in the world.It also lay the largest egg and has the fastest running speed (ie around 73kph)                                   IS BIRD REALLY SMART?                            Birds do a lot of activities that they may seem smart, but how much of their behaviour is instinct of intelligence?                                                     Orni