The Wickersham Brothers are Sour Kangaroo's simian henchmen, and the tertiary antagonists of Dr Seuss's Horton Hears a Who. They are the race of blue monkeys with green eyes.

They help their boss in her fiendish plan to steal the clover and try to prove Horton wrong. They tie Horton up and when they find out the Whos are real, they turn against Sour.