Ratites have feathers which are quite good for insulation and utterly useless for flight.
(Ratites; have; feathers which are quite good for insulation and utterly useless for flight) (feathers; are; quite good for insulation and utterly useless for flight)
Ratites feathers
have are
feathers which are quite good for insulation and utterly useless for flight
quite good for insulation and utterly useless for flight