I like your framing and composition. :thumbsup:
The saturation looks a bit over on my screen but some came out quite well, I must say. Maybe it is not the saturation but seems to have a bluish/greenish cast over the pics.
BTW, the first pic is blurred b/c of movement/hand-shake, I think.
Keep shooting and how about some of the animals too since like everyone is saying, u titled this as zoo, ya!