Complex sentence: During breeding season, usually during the warmer months, a male pigeon will court the female by puffing out his chest, bobbing his head and strutting circles around her, all the while cooing his affections to her.
Split into simpler sentences: During breeding season, usually during the warmer months, a male pigeon will court the female. He will puff out his chest, bob his head and strut around her, all the while cooing his affections to her.