Answer:

TWEET

AnswerCrossword Clue
TWEETNestling's noise
TWEETAviary sound
TWEETBirds do it
TWEETChirp
TWEETChirping sound
TWEETBird sound
TWEETOscine sound
TWEETWord from a bird
TWEETCanary comment
TWEETMicroblogged update
TWEET140-or-less message
TWEETModern message
TWEETBird call
TWEETBird word
TWEETMessage that can't exceed 140 characters
TWEETCry from a nest
TWEETHigh-pitched sound
TWEETSound from a nest
TWEETTwitter message
TWEETMessage since 2006
TWEETOnline status update limited to 140 characters
TWEETShort online posting
TWEETCertain follower's reading
TWEETSing like the birdies sing
TWEETNoise from the nest
TWEET"Rockin' Robin" refrain word
TWEETCanary call
TWEETParakeet comment
TWEETWhat a little bird told me
TWEETNestling noise
TWEETBirdcage call
TWEETTwitter posting
TWEETModern posting
TWEETOnline communication of 140 characters or fewer
TWEETSend a message via Twitter
TWEETSing like a canary
TWEETUse Twitter
TWEETType of message first sent in 2006
TWEETBrief message read by one's followers
TWEETSend a brief message, nowadays