One of the easiest ways to tell the difference between a butterfly and a moth is to look at the antennae. A butterfly’s antennae are club-shaped with a long shaft and a bulb at the end. A moth’s antennae are feathery or saw-edged.

OK but these have a long shaft with a feathery thing at the end. They are also diurnal, yet have stout fuzzy moth-like bodies.

They are butterflies, having clubbed antennae. Moths have feathered or combed antennae as Owd says. Most butterflies land with wings vertical over their backs unless when sunning them selves and fly during the day. [though there are a few diurnal moths with vertical wing placements the early Thorn for example]
they are thought to be one of the earliest group of butterflies to have evolved from moth like ancestors. Hairy bodies are not unknown especially for those in colder climes.

I did an article for a gardening group about moths in our garden. I will copy it onto GoY.

Ok Eileen thanks I'll be looking for your article. Let me know when it's up.

gardening with moths in mind is now posted Paul.