Answer: thelorax

AnswerCrossword Clue
THELORAX

Seuss story concerned with Truffula trees

THELORAX

2012 animated movie promoted by IHOP

THELORAX

Dr. Seuss book

THELORAX
Dr. Seuss's titular environmentalist
THELORAX
Book featuring Humming-Fish in a pond full of Gluppity-Glupp
THELORAXTitle Seuss character who speaks for trees
THELORAX"You're glumping the pond where the Humming-Fish hummed!"
THELORAXBook featuring a Whisper-ma-Phone, a Super-Axe-Hacker, Gluppity-Glupp and Schloppity-Schlopp
THELORAXChildren's book made into a 2012 3-D animated film