Related Clues:

• 140 characters-or-less posts
• Twitter posts
• Makes short sharp sound like bird or grasshopper
• Makes short sharp note like bird or grasshopper
• Posts online and on the radio Jonathan Ross's pleasures?
• In excessively sentimental way set up online messages
• Baby bird's sounds
• Expressions of 140 characters maximum
• Brief online updates
• 140-characters-or-fewer messages
• Smoke detector sounds when the battery runs low
• "The movies won't be the same without 44-Down" and others
• Chirps social media postings
• Messages limited to 140 characters
• In-flight calls?