last summer, a "stranger" dropped by to ask if there was a collective for a group of butterflies. it was agreed that there didn't seem to be one extant, and several good suggestions were forthcoming -- but somewhat later I discussed this with Charlie Elster ("There's A Word For It!") and when I mentioned 'flutter' he proposed 'flutteration', which I thought was just right. too bad the stranger will never see it. (also last fall, there was a book published with the title "What Do You Call a Group of Butterflies? And Other Insects" by Emma Nathan. but I'm not going to order it just to see what she came up with... :)