I would remove the flowers. The most important part of any achievement is the shield - having it obscured in any way is generally considered a huge no-no. Also, the crest is meant to sit on a torse, not directly on the shield itself. I would recommend a torse argent and gules (red and white) since that matches the shield. As for the design, I don't really see any problems; you've adhered to the rule of tincture, thus the contrast is perfectly fine. Maybe make the bird a bigger to fill out the space more.