Related Clues:

• Perceptive raptor (spotted)
• Looked at more than a birdie, being perceptive!
• Having acute vision
• *Like the American sniper in 'American Sniper'
• A delight, the old being entertained by editor quick to notice things
• Highly observant
• Extraordinarily observant
• Bird looked, having means to do so well?
• Far-seeing