The fastest bird in flight is the Common Swift (Apus apus). The Common Swift reaches a maximum speed of 171 km/h (106 mph) during the flight.
Source: https://dinoanimals.com/animals/the-fastest-birds-in-the-world-top-10/
The White-throated Needletail (Hirundapus caudacutus) – a cousin of the Common Swift is commonly reputed to reach speed of up to 170 km/h (105 mph), though this has not been verified.
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