What is the primary difference in typical plumage coloration between New World and Old World warblers?
Answer
New World warblers are vividly colored (gold, red, yellow, black); Old World warblers are subdued (gray, brown, muted green).
New World warblers are generally much more vividly colored, featuring bright combinations, whereas Old World warblers tend to display more subdued plumage leaning towards gray, brown, and muted green tones.

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