Catbuds- Indeed I can, though I lack the skill for warbling. I've seen the math on the carbon dioxide we exhale and while the numbers say it won't have an impact that doesn't keep my from feeling good about breathing near the babies =)

I use pretty much the same insect solution, plus a couple drops of Neem Oil. If memory serves me right it's squeezed from a Mediterranean evergreen plant and bugs can't stand being near the stuff.