eurhipidurous

from The Century Dictionary.

• Having the tail-feathers disposed like a fan, as a bird; not saururous; specifically, belonging to or having the characters of the Eurhipidura.

from the GNU version of the Collaborative International Dictionary of English.

• adjective (Zoöl.) Having a fanlike tail; belonging to the Eurhipiduræ, a division of Aves which includes all living birds.