Related Clues:

• Boldly patterned warblers ... and a hint to 17-, 24-, 50- and 59-Across
• They're not the ruddy end, and that's for the birds
• Fliers about to jump lights at stop?
• Flyers extremely tenacious locked on to Betelgeuse, for one
• American warblers
• Colorful warblers
• Fly-catching warblers