Heavy Zed

Heavy Zeds are owl creatures found in the Tree Zone of Super Mario Land 2: 6 Golden Coins. They can be used as platforms to reach high places. When Mario approaches one, he will wake up, and then and only then can he use one as a ride. The top of the owl's head is flat, making him an ideal platform for Mario to stand on while being flown to a higher area.

Trivia

 * Heavy Zed, the Owls from Wario Land II and 3, and Hoot the Owl from Super Mario 64 are all very similar in that each on of them is a sleeping owl that flies the player to otherwise unreachable places when awoken.