Their size is another matter; considering that one of them is the Ghost moth which is large even by macro standards, they would look bizarrely out of place among the tiny scraps and thumbnails collected in the Micro Moth Bible. I've just thoroughly enjoyed Penelope Fitzgerald's novel Innocence which has a relevance to giants among pygmies, but I'm not going to spoil her plot by saying more.
To me, the Swift moths are particularly interesting as another example (I've mentioned Emperor moths in the same context) of the power of the reproductive process even when this seems to have little point other than itself - breeding simply to breed, the species surviving just for its own sake. I know that this is an entirely human take on the whole glorious system of the natural world, but I can't help hoping that one day an Orange Swift may develop a proboscis - they don't even have those so the adult moth cannot feed and doesn't live long. Or that they find some way of accelerating the caterpillar and chrysalis stage of their life cycle which, most unusually among UK moths, takes two whole years.