These structures allow the birds to attract mates and to serve as threat display to rivals, and in rare cases act as camouflage when the flora is also extremely colorful.
(the birds; to to serve; as threat display; to rivals) (the flora; is also; extremely colorful) (These structures; allow; the birds to attract mates and to serve as threat display to rivals) Context(These structures allow,List([0, 22))):(the birds; to attract; mates)
These structures allow,List([0, 22))
the birds the flora These structures the birds
to to serve is also allow to attract
as threat display to rivals
extremely colorful
the birds to attract mates and to serve as threat display to rivals
mates