Birds without fezzes

Mammals with fezzes, birds with fezzes and now birds without fezzes. See what happened there? Clever, huh? No. Really. Clever, very clever.

Birds with fezzes

From mammals we move smoothly to birds. Very serious, exuberantly browed birds. The one on the left looks a bit upset; or maybe that's just the way he looks. Which would be upsetting.