Actress Seehorn or Perlman (4)
I believe the answer is:
rhea
(Other definitions for rhea that I've seen before include "Ostrich-like bird of South America" , "Flightless bird -- satellite of Saturn" , "Flightless bird - Greek fertility goddess" , "Ostrich-like bird - satellite of Saturn" , "South American flightless bird - mother of Zeus" .)