Sentences with phrase «yellow air sacs»

Punctuating their displays with swishing, hooting and popping sounds, males bob their heads, fan their tail feathers, raise their wings, and expand and contract distinctive yellow air sacs to compete for females» favor.

Every spring, male sage - grouse, which stand two feet high, return to historic strutting grounds known as leks to perform elaborate courtship dances during which they inflate yellow air sacs on their chests to impress female onlookers.

Not exact matches

Green means healthy, yellow means a reduced ability to push air out of the lung's small air sacs, and red means severely reduced ability.