During the spring, male sage grouse gather in an open area and strut about, erecting their feathers in a fanlike display. They also make booming sounds using their inflated air sacs. The function of this dance is to .

Attract the female attention

Explanation:

Male sage grouse have feathers to the toes, pointed tail and legs, two inflated air sacs on the neck, brown throat and black belly. In the mating season, many male sage grouse gathers in an open area do courtship display to attract the females.

In their courtship display, they erect their feathers like a peacock do and make blooming sound by inflating their air sac. Females choose that male sage grouse which seems to be more attractive to them and mate with that male sage grouse. Therefore the function of this dance is to attract female attention.

as the gila monster consumes the eggs or young of the desert cottontail and gambel's quail, thus its main food supply is only accessible for a restricted time duration every year. however, for this, the gila monsters exhibit three adaptations, which elevate their survival rate in the desert condition.  

first, is that they possess huge bodies, and can consume greater concentrations of food during a small period. secondly, they require to feed infrequently as they can accumulate fat in their tails. ultimately, their rate of metabolism is very low, so that they can burn their reservoirs of fat gradually.