The eye goes first to the area with greatest contrast.  This can be a contrast of color, of brightness, of texture, of clarity, whatever.  If one egg in the carton is fuzzy, could you avoid looking at it?  If the dancefloor is a whirl of motion, can you avoid tripping over the one couple not moving?  Camouflage is part of the natural world, so anything different might be dangerous, and if it is really different, it needs to be examined.

We can use this to pull the butterfly into prominence.

First, I cut out the butterfly and put it on a separate layer so it would be isolated from the experimental reatments. 

I duplicated the rest of the field and tried using a circular motion blur (roughly centered on the butterfly) to give the effect of flapping wings.  There were 2-3 layers with different amounts of blur, all blended together.  This softened the lines, and staggered them.