For this shot I did a cg tear drop animated it and added it into the scene. Did some composting as well to make the droplet look reflective and then I added a pearl and composited that as well. Used HDR's for the reflections.
For this scene I animated the flies in the scene. I tracked the scene as well. CG fly model was found online. Texturing and Lighting was done by Jacques Clement. HDRI that was used is down below: