An active and social small bird of broadleaf and mixed forests, usually in hilly regions. Thin, rather turnip-like crest is often held vertically. Gray with a black head marked by bright white cheek patches. May be confused with Coal Tit, but has a less wispy crest, lacks wingbars, and averages darker and more contrasting overall. Gives high thin calls, often heard as a flock whizzes overhead.