Duck! Rabbit! is a 2009 children's picture book written by Amy Krouse Rosenthal and illustrated by Tom Lichtenheld. Published by Chronicle Books, it follows two narrators as they debate whether an illustration is a picture of a duck or a rabbit.

In a New York Times article discussing some of Rosenthal's books Bruce Handy wrote "As for the wonderful “Duck! Rabbit!” it is the funniest children’s book ever based on a 19th-century-style optical illusion (or more properly, the Internet tells me, “ambiguous figure”).".^[1] BookPage wrote "The text is easy and accessible for the earliest reader, but the ideas are intellectually satisfying for the adults who want to join the fun."^[2]

Duck! Rabbit! has also been reviewed by Kirkus Reviews,^[3] Publishers Weekly,^[4] Common Sense Media,^[5] Booklist,^[6] School Library Journal,^[7] The Horn Book Magazine,^[8] and Library Media Connection^[9]

It is a Junior Library Guild selection,^[10] a 2010 American Library Association Notable Children's Book,^[11] the 2012 Grand Canyon Reader Award Picture Book winner,^[12] 2011 Beehive Awards Picture Book winner,^[13] Runner-up for the 2012 Monarch Award,^[14] one of the 2010 Baker’s Dozen (13 best books for Family Literacy),^[15] and appears on the 2010 Texas 2x2 Reading List,^[16]

• Rabbit–duck illusion
• Optical illusion