Oddly, in England, I guess they refer to them interchangeably.
My boss is English, albeit an English version of a hillbilly - he's from the area called North Umbria.
When he saw my desktop pic on the computer at work, he blurted out,
"Oh, look, what a spankin' cockerel. He's brilliant!"
It was a pic of a raging, firey-eyed rooster someone had posted on BYC.
Maybe we need Helena to sort this one out for us.