As for Vullaby and Mandibuzz...
Vullaby: I think...Vull - Vulture and aby - baby. Baby vulture.
Mandibuzz: Mandi - Female name, and mandibuzz are female, and Buzz - Buzzard.
Thats what I thought.
EDIT: Thats not an eggshell on Vullaby's bottom, it a SKULL, methinks.