Hi mcdiddy, welcome to the forum
i am no way a superior photographer, but i will give you my opinion on your pics. I have a flickr as my sig so you will see I am no master
1. I would crop to decentralise butterfly, I like the bokeh so would have the butterfly on the right
2. The vignetting on this pic keeps the eye within the picture, I would try to lighten bottom right corner though (definitely remove or crop out the fence thingy) this picture tells a great story and I like it
3. Pelican in shade, distracting background, try flash next time
4. Small amount of post processing will make this pic a WINNER
5. Doesn't catch any interest at all sorry
Hope This helps