Butterfly net

A butterfly net (sometimes called an aerial insect net) is one of several kinds of nets used to collect insects, not just butterflies.  The entire bag of the net is often made from a lightweight mesh (or web of threads) for less damage to thin butterfly wings.  Other forms of nets used in insect collecting (for entomology) include: beat nets, fishing nets, and sweep nets. Nets for catching different insects have different mesh sizes, with less space between the threads. Fishing nets usually have bigger, more 'open' mesh. Catching small aquatic creatures usually requires an insect net. The mesh is smaller and can capture more forms of animals.

 References 
"Butterfly and Insect Nets for Professional, Student or Child." The Bugfacts.net EStore. Web. 2 May 2012.
"Taron, Doug. "Gossamer Tapestry." : Some Thoughts on Butterfly Nets., 10 Apr. 2009. Web. 4 May 2012.

Other websites
Collecting and Preserving Insects and Mites: Tools and Techniques USDA Very detailed online manual

Category:Tools
Category:Collecting
Category:Butterflies