Straight away I like the composition and how you were balancing everything. I believe the sunlight or angle of it. Makes your photo seem very flat. There is also a fuzziness to it. Maybe a slight focus issue and maybe just due to the light or lack of it. None of the textures pop out and basically no shading or shadows. I understand trying to chase and catch a butterfly without it flying away is very difficult. I do think the shading would have worked out well and helped your score tremendously if not for the flat looking light. There also appears to be some noise issues. Most of this stuff can be corrected and your well on the right track. Don't give up.