Which bird is the smallest flightless bird?

  • A. Penguin
  • B. Kiwi
  • C. Ostrich
  • D. Inaccessible Island rail

Correct Answer: D. Inaccessible Island rail

Flightless birds are birds that through evolution lost the ability to fly. The smallest flightless bird is the Inaccessible Island rail. The Inaccessible Island rail is a small bird of the rail family and the length of which is 12.5 cm and weight is 34.7 g, and also the smallest extant flightless bird in the world.

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