Answer: whooper

AnswerCrossword Clue
WHOOPEREndangered bird
WHOOPERNoisy celebrant
whooperwhite North American crane, Grus americana, having a loud, whooping call: an endangered species
whooperone who whoops (to utter loud cries)
whoopercommon, Old World swan, Cygnus cygnus, distinguished by a yellow patch at the base of its bill, noted for its whooping cry
whooperperson or thing that whoops