The Great Gobsmack is a relatively large bird native to the forests of Vogelheim. It shares several anatomical and behavioral features with its close cousin: the Gurgle-Gob. Unlike their smaller cousins, male Gobsmacks have a less flashy coloration, making it easier for them to hide from predators in the dense undergrowth of the forest. They still, however, have an array of waddles growing from their necks which are irresistible to females.

During the mating season, male Gobsmacks congregate in meadows and perform an intricate mating dance with a cacophonic concert of deep gobbles. While not as utterly horrifying as the noises made by Grugle-Gobs, sounds produced by these birds are anything but pleasant. Researchers reported that a Gret Gobsmack's mating call can cause throbbing headaches from prolonged exposure and even full-body vibrations. This is due to the low frequency of these sounds. It also seems that no predators are attracted to this sound for that exact reason; predators also seem to suffer from these negative effects when exposed to the Gobsmack's mating calls.

Females of this species are around 20% smaller than the males and have a greyish-brown coloration with green spots. And, of course, they lack the characteristic waddles. Female Gobsmacks are also much more shy and reclusive, hiding in the undergrowth much more effectively than their male counterparts.

The name of this bird came from the state in which the researchers were left upon first discovering it and upon first exposure to their horrendous mating calls. They were left utterly GOBSMACKED.