Cheers Kev.
I would say 90% of my photos are in the garden at home - or certainly in the immediate area. I don't usually have the time (or the feet that are sore after walking nowadays) to go any real distance from home, though I do occasionally nip somewhere in the car and have a little walk.
The latin names look up from a few websites I keep bookmarked - but I would normally try and find a common name for the isects as that's what most us would have read or heard.
Macro photographs are a rare breed when it comes down to success - reasons being they are probably the hardest genre in which to nail a top quality image simply because the subjects are ridiculously small, and in most instances, the critters are in places that are incredibly difficult to reach without causing a slipped disc or some other ache and pain as a result!
Worst thing is, the market for buyers is tiny - imagine if you would walking into your doctors or a pyschiastrist's office and have to pass in the corridor a big print of a spider or a wasp or some other bug (and lets be honest about it) that most people would never pick up and look at!
Paul.