"See that one Ollie, that's Papilio Machaon, also known as the Common Swallowtail. And that one with the yellow wing edges is Nymphalis Antioipa; the Camberwell Beauty".
"And what's that one Harv'?"
"A very good question, Ollie. It's a Large White, sometimes known as a Cabbage White. That's the one that makes Grumpy's blood boil when he sees them up at Haddock's".
Two of my grandsons, Harvey J and Ollie, having a day out at The Botanic Gardens, Edinburgh.