How this one came about represents the best of Twitter (yes, I'm aware that Twitter is not always at its best). The gardener and writer Harriet Rycroft tweeted a video showing her attempts to get a fledgling goldcrest out of her hair. I saw it when it was retweeted by Cambridge rare books librarian Emily Dourish. It drew the comment that the adventure was "like something from an Edward Lear limerick". This spurred me to the following, which appears here very slightly altered:
There was a young Cotswold goldcrest
Who mistook someone's hair for a nest
When they said "You belong
In an Edward Lear song"