: a white cockatoo (Cacatua alba) native to Indonesia that has a long, broad, white crest resembling an umbrella when raised and that is often kept as a pet
Sidney is a 20-month-old, foot-tall white umbrella cockatoo with yellow markings under each wing and its tail. Store manager Dana Adams says only the bird knows whether it's a male or female.—Larry Powell, The Dallas Morning News, 12 Jan. 2001
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