Based on Andrew Nowicki’s fascinating program on owling in Michigan during the winter:
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Owling Etiquette
Beware of bright light
Limit the use of calls
Keep your distance
Preserve roosts and nests
Owling Tips
Dress warm and quiet (no noisy jackets)
Play smaller owl calls first (Screech, then Barred, then Great Horned)
Listen
Consider visiting a hotspot for daylight owls
Binoculars with clear images are better than those with higher magnification that magnifies handheld shakiness