Ability to breath air highly concentrated with toxic fumes
The Tibanna mynock was a highly adaptable species of mynock that could be found on the gas giant Bespin and other planets where Tibanna gas was present. The Tibanna mynocks resembled normal mynocks, but possessed specialized gills that allowed them to breath air that was highly concentrated with toxic fumes. They also consumed Tibanna and their bodies contained pockets of the gas. In about 17 BBY, an Ugnaught inadvertently disturbed a group of six Tibanna mynocks that were perched on top of a Tibanna container in Cloud City on Bespin, causing the mynocks to attacked a nearby group of Alderaanian Resistance agents.