the.com/wattle
The fleshy flap dangling under a bird's chin that's basically a built-in radiator.
cooling systemHelps roosters and turkeys dump excess body heat
sex signalBrighter, redder wattles mean a healthier mate
plant impostorAustralia's acacia trees also claim the name
old building trickWattle and daub walled homes for millennia
mood ringTurkey wattles flush blue when scared or excited