Well I personnally like the background in the collections screen. Also, I found that if you click on the jar the insect not only moves around but the lower screen area will tell you what it is....like uncommon cockroach, common lady _bug_ and so on.
As for catching these bugs, I have a technique that nets them about 35% of the time, wait for them to land. As long as you are carrying the watering pot, soil, shears etc they won't move, then gently pick up your net, and laterally move from the top of the screen towards the insect, (Dangit, I just lost a plant while typing this) anyway creep up on them then swat. If you miss, quickly go to the top of the screen and take one more swat at it, if you miss after two swats give up. They'll be back, promise.