Category:Butterfly net
Butterfly nets have been used several times during the comics. When the category was created there had been two incidences within a month an three within a year, but it has also been used previously. The interesting part is that so far it seems the net has never been used to actually catch butterflies.
Here is a list of what they have been used/suggested to catch:
Pages in category "Butterfly net"
The following 6 pages are in this category, out of 6 total.