Answer: bowerbirds

AnswerCrossword Clue
bowerbirdsBOWERBIRD, any of various passerine birds native to Australia and New Guinea, which construct elaborate runs adorned with feathers, shells, etc. during courtship
bowerbirdsA strong-billed Australasian bird, noted for the male's habit of constructing a bower adorned with feathers, shells, and other objects to attract the female