wow! that is great that you caught a bee mid-flight!

Although this is fine, I think it would have been a stronger image if you'd been able to make a tighter composition focusing on just the center of the sunflower. The patterning in the center would have been really fascinating closer up.

I take your word for it that you used a macro lens for this, but IMHO there isn;t anything about this shot that demonstrates the classic characteristics or advantages of using a macro lens. I have taken similar shots with my regular lenses.

If I could count the hairs on that bee's abdomen, THAT would scream macro to me.