1. my neighbours don't complain a lot about American Crows because I live in Italy and I mainly see hooded crows, carrion crows and ravens in my area
2. I've seen them often in California and in Seattle. I hope to see many of them on my upcoming trip to Canada
3. that map tells me I have good chances of seeing them on my trip!
4. I am not sure which birds would benefit directly from crows. Maybe some smaller birds that are not part of a crow's diet? My local crows seem pretty good at mobbing other predators out of their area, I wonder if the american crows show the same behaviour
I was definitely surprised by fish (I didn't expect it to be part of any owl's diet), immediately followed by possums (I didn't think owls could eat prey that large).
In the wild, I've seen (and heard!) various Eurasian Scops Owl this summer in southern Italy; an Barn Owl flying over my car in Scotland, nearby Loch Ness; and just last night I've (mostly) heard and (barely) seen a couple of Tawny Owls in the woods in northern Italy, where a veterinary working from a local birding group released a Little Owl back to the wild. The latter experience is what prompted me to join this course.