The fastest bird in the world is Peregrine falcon

Peregrine falcon which is a large crow shaped falcon  is the fastest bird in the world  with a maximum  recorded air speed of 389 Km/hr .

• It mostly feeds on medium sized birds and lives around mountain ranges , valleys and coastlines and even in cities .

• Its lifespan is  15.5  years .

• It is found everywhere on earth excluding polar regions and the arctic.

• Due to the widespread use of DDT it became an endangered species in many areas but after the ban on DDT  populations of the species have recovered .

SOURCE