Thank you for the feedback. Next time, I will take the picture outside and with a higher resolution for better lighting. Secondly, I would like to point out that I have put a gesso base on the birdhouse before I started the project. Unfortunately, I have learned that cadmium yellow is HORRIBLE at covering anything up. As for the cutie marks, I have first painted a white under layer before I got started on the butterflies. Perhaps I should use a thicker under layer or do a better job of mixing the colors.
I really appreciate your input and I will continue to make improvements.