Do Bugs Understand Glass?

Hank and John: Do bugs understand glass? Are windows a constant perplexing struggle in their daily bug lives, sandwiches and spiders? Emily igot says she watched a bug ram its little body to the glass from the outside several times before just landing and chilling on the window for a while. Hank thinks that there is enough reflection off the glass, almost always, that they recognize that it is a barrier of some kind.