I concur with Carol. Here in Vermont, they are huge and abundant. I hear in fact, it was in strong running to be our State bird.... I use a Thermacell not only for observing, but most evening events. They work wonderfully!
-------------------- Carl
JStar 12" Truss Dob w/Swayze Mirror
StellarVue SV50 "Little Rascal"
SV102ED
SV80ED(NHNG )
SV70ED
LS60THa/B1200
AT66 (Chrome)
G-11 Gemini, GM-8
AT, WO, and TV eyepieces