Source: http://monsterhunter.wikia.com/wiki/Great_Baggi

Great Baggi is a Bird_Wyvern introduced in Monster Hunter 3.

Its eyes will glow yellow in the dark. Great Baggi are matured male Baggi that have taken over a pack of their own. Great Baggi is also slightly larger than the Great_Jaggi.

Located on its head is a crest that can be obtained in a way similar to Great Jaggi's frill.

It has developed its own unique ability; it can spit a tranquilizing liquid that inflicts sleep on its prey or hunters. It also has developed the ability to command Baggi to surround prey or hunters and spit tranquilizing liquid at them with a roar.

Great Baggi and Great Jaggi are often seen to be hostile towards other boss monsters; when in the same area they will occasionally cease fighting the hunter to attack other monsters.