The background needs a bit more yellow-green with brighter yellow tones in the left corner and kind of going in a dull dark tone in an arc from the upper left corner to the lower right corner. As someone else said, add a brighter purple/violet tone to the flower and put in the spaces between the flower groups, otherwise it looks very clumped. The eyes need a brighter white tone reflecting. The photo has the bee's abdomen in a luminescent look so try to achieve that. Add a shade of turquoise blues and greens on the abdomen's first ring and add the fuzzy look at the bottom. The wings look like they are completely white or have light charging through them, so make it transparent by allowing more purple from the flower to shine through by painting it a bit more and reducing the white flair. Instead, go really thing and add low opacity white tendrils on them. It will give off that 'crisp' wing look. Brighten the colours to keep contrast as the lower part of the abdomen is indistinguishable from the flowers' dark side (or I can't see well because I am sleepy )
Yeah you definitely need contrast between the flower and the bee. Right now it's hard to distinguish between the black part of the bee (sorry, don't know what that's called) and the flower. Make the flower much more saturated and it'll have good contrast with the bee.
Also, if you look at the photo, you can see the flower reflected part of its purple-ish light onto the bee (really visible on the yellow furry part). You'd want that in your drawing too.
It's a great attempt. I think one thing that would improve it is to brighten up the piece a little bit. If you flip back and forth between the photo and the painting, you'll notice yours looks a bit dull compared to the photo. I think you can use a brighter purple on the flowers and make the background a little more yellow-green, and it'd make the piece pop a lot more.
Thanks so much for the advice! I would never have noticed otherwise, haha, but now that you point it out the WIP was really dull. Thankfully, it was a quick fix, just playing around with the saturation/contrast/brightness sliders~