The line comes from 'Close to You,' the 1970 song made famous by the Carpenters, where birds suddenly appearing is used as a metaphor for falling in love. The lyric has long outlived its original chart run, becoming shorthand online for that instant when someone special catches your eye. Short clips of the line now circulate as a gentle, instantly recognisable cue in romantic edits, reaction videos and couple montages, because listeners already associate it with warmth, surprise and new affection.