Image: A pumpkin toadlet is a brightly colored poisonous frog found in southeastern Brazil. They are so small enough to fit on a fingernail. Image: Fabio Maffei/Shutterstock

A pumpkin toadlet is a brightly colored poisonous frog found in southeastern Brazil. They are so small enough to fit on a fingernail.
Image: Fabio Maffei/Shutterstock