No idea. We have a lot of ants around here, I live in a bush area. I'm diabetic so used to carry a muesli bar in my bag so maybe that attracted them. It was sealed in it's packet though and I have never had ants around any of the other snacks I have secreted around the place.
I think I have evicted most of them as I haven't spotted any for a while now - I sat with my wife's point and shoot to get the video craved by earlier posters and failed to see any.
Given that I only ever saw them externally on the camera or in the viewfinder I guess it does speak well for the weather sealing. No ants ever made it into the main part of the camera despite nesting next door.