Possible Clues:

• Bird we see settle on perch?
• Bird's come down by train
• Bird to alight on bar
• Obtain transport for bird
• Bird on country track
• Winger needing light form of protection
• The train runs over the bird
• One may fly and catch trains
• The Flying Scotsman might have flown over this flyer
• Come down to the bar? It's a harsh call