'He is sending a signal of dominance, so that the others will know he's the alpha,' Mr. Conniff said, gesturing with a forkful of crab cake. 'Wow, he looks really good.' More strikingly, Mr. Conniff said, Mr. Perelman's posture and behavior were similar to that of the male Bonasa umbellus, the ruffed grouse, a forest bird found in the colder regions of the Northern Hemisphere known for its chest-puffing and wing-thumping displays.Applying rules for natural observation to the study of the mega-rich.