The appearance of leprechaun pterodactyl is similar to that of toothless pterodactyl. The adult's crown starts from the nose and mouth and extends to the back of the head. The head crown of leprechaun pterodactyl is bigger and more obvious than that of toothless pterodactyl. Both males and females have big crowns, but the female's crown is round. Leprechaun pterodactyl is 2.5 meters long, with a wingspan of 5.4 meters and a skull length of 90 centimeters. They seem to live on the coast of South America and feed on fish.

Leprechaun pterodactyl belongs to pterodactyl superfamily, but it is uncertain whether they are closer to pterodactyl (including the giant Texas species Fengshen pterodactyl) or to ancient pterodactyl and its close relatives.

Paleontologists at Portsmouth University discovered the first leprechaun pterodactyl larva fossil in northeast Brazil, which was described by David Martell and Darren Nash in 2006. This discovery supports the view that cephalopods are symbols of sexual maturity.

This large pterosaur with a wingspan of 6 meters has slender supports in the hollow wing fingers, which can enhance the strength of the wings, but only add a little weight. Therefore, the wings of the fairy pterosaur are as big as a small house, but the actual weight is no more than a child!