The problem of keeping a feathered bird cool can be broken into two distinct parts:  coping with internal sources of heat (e.g., muscles working during exercise) and coping with external sources (e.g., sunshine). I decided to tackle the second question first---it seemed like something I could answer with a couple of thermometers and a dead woodpecker.

The progressive reaction is characterized by the direct, intimate fusion of visual and emotional enjoyment with the orientation of the expert. Such fusion is of great social significance. The greater the decrease in the social significance of an art form, the sharper the distinction between criticism and enjoyment by the public. The conventional is uncritically enjoyed, and the truly new is criticized with aversion.