I read that message too and was amazed, though I had heard that museums do do this.
A few questions though.
1) Would this be the British Museum. I thought they were more interested in stone things?
2) Did anybody on site think to ask for this persons museum accreditation?
3) If they did, was this proffered?
4) If it wasn't, did anybody take a photo of the person doing the catching?
I'm not trying to start a witch hunt, but it does not sound good. I've got a net I use for moths, so what's to stop me bowling up at Hadleigh, nabbing one, saying it's for the Natural History Museum, and then leaving again?
In other words, was this kosher, and how can we find out. Phone the British Museum?
Had I been on site, no way would I have let somebody net one and take it away without being very VERY sure it was right and proper. And let's not even get into whether museums should be allowed to collect rare natural history specimens in the first place.
Rgds
Jonathan