My first leafcutter bee "packet" appeared in the curl of a swiss chard leaf. It is now in a little net baggie hanging underneath a sonic cup, under the oak tree the swiss chard was growing under. Needed an ant and birdproof location, no perch for a bird... I have just ordered a nesting block for the leaf cutters with a little chalet, from crownbees... Hope to keep these going. I had seen the adults in the wildflowers but this is my first nest.