Gigantic Grumplumper

Gigantic Grumplumper is a dragon species mentioned in Dragons: Rescue Riders.

Egg
The eggs of Gigantic Grumplumper are large, and presumably similar looking to the Roaming Ramblefang eggs.

Season 2
Leyla briefly mentions the Gigantic Grumplumper while trying to identify a dragon egg in "Double Finked".