What’s really happening when two finches fluff up and pause before taking off? In the early hours of this morning, after watching this video, that's where my mind took me. Who needs sleep 😝 The answer though? A lot, it seems, all backed by known finch and small-passerine behaviour. • Fluffing helps regulate temperature by trapping warm air between feathers (thermoregulation is a key finch survival behaviour) • Finches also fluff when relaxed or socially comfortable, which is why bonded birds of