I went to the Zoo this week… Lovely day out…. Thought “I know, I’ll take the new camera!” (I'm still a beginner) So between the reflections in the glass, small mesh that I couldn’t zoom through far enough I barely got a good shot of anything. Not only this, like I have been told by many people, my kit lens isn’t really great for anything like this. Can’t zoom enough, can't focus at a distance - wasn’t brilliant…. Best shot I took was of a smiling orangutan through the glass – and this was with my bloody iPhone :O( So all in all a pretty frustrating afternoon.
finding a good zoo is your starting point, then you can better tune your skills - I was feeling a little like you until I found a great zoo, now I'm a season holder ;o) and I even get emails from the guests ;o)