1. (of a bird) unable to fly; having wings that are not functional for flight

Examples

• Penguins are flightless birds that live in cold climates.
• The kiwi is a flightless bird native to New Zealand.
• Ostriches are the largest flightless birds in the world.
• Many flightless species evolved on islands where predators were scarce.
• The emu is a flightless Australian bird that can run very fast.