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Take to the skies, just like these various birds from around the world. The unused letters will reveal two creatures which can also fly.

ALBATROSS AVOCET BUSTARD BUZZARD COCKATOO CRANE CRESTED SWIFT DIPPER DIVING PETREL FAIRY-WREN FROGMOUTH HAMMERHEAD HONEYGUIDE HORNBILL KINGFISHER MAGPIE MOTMOT OILBIRD PAINTED SNIPE PIGEON QUAIL RAVEN SANDGROUSE SHEATHBILL STORK STORM PETREL SUNBITTERN SWALLOW THRUSH WAXWING WOODPECKER