Answer: emperorpenguins

AnswerCrossword Clue
EMPERORPENGUINSAntarctic denizens
EMPERORPENGUINSSome Antarctica residents
EMPERORPENGUINS"Happy Feet" critters
EMPERORPENGUINSFlightless Antarcticans
EMPERORPENGUINSSubjects of a hit 2005 documentary