Hi Claudio,
I'm pleased it has made you consider having a go at this genre but don't give up the bugs
Unfortunately there's a lack of flowers here that make reasonable subjects but I have spotted a couple of interesting weeds and am sure no one would realise the difference.
As for the frame I tend not to put much thought into this subject but considering I took the deliberate action to add it I had to have thought it benefited this particular image at the time. If I do use one I stick to the plain white canvas extension as this or occasionally the white drop-shadow.
I like the 'a flower without a web is not a flower' idea, does the same go for flowers without insects as well
This critter must have landed after I focussed and moved away to take the shot, I only saw this once it was on the computer.
Grahame