This time I tried animating the raster image with Moho. Turns out it works quite after if you pay a little attention to the image layers. The image was initially created for the greeting card, but decided to trying animating it a bit. As it can be seen by comparing the outcome and the screenshots, I deviated from the original content a bit because the "bugs" animation felt too static after all. Once again, particles to rescue! 
Original image:
Moho document:
