Possible Clues:

• Out of breath
• Flier good for advertising
• Bird finally landing, breathing heavily
• Short of breath, bird tiring in the end
• Winger back in training, evidently somewhat unfit?
• Advertising book for children with good ending
• Seabird beginning to get out of breath, apparently
• Diver in sea beginning to gasp, in need of oxygen?
• Apparently short of wind, seabird heading for gale
• Blowing tobacco smoke out into the air