When I checked the BSF this morning I noticed some final stage larvae had exited through the vent holes and landed on a plastic lid that was under the bin. I keep the bin on sawhorses to help prevent ants from getting in. The interesting thing is that the larvae were going in circles, apparently unable to climb the small lip of the inverted storage container lid. That lip can't be much more than 3/8 inch.
I moved the lid and let the larvae go free because I have more than I can use now.
