Neighbor blatantly not conforming to conservation easement

My neighbor is building a medium sized shed. It appears 30’ long.

The problem is, all the parcels in our area have what essentially is a ‘no building’ easement held by the state wildlife dept. It is a rural neighborhood boarding a state wildlife area and the state’s easement do not allow any increases in covered sq footage weather it is an outhouse, shed, addition, garage, etc. It is a no build restriction.

I have had a history with these neighbors. When they moved in 2 years ago they did a lot of renovations, including placing a septic field 20’ from and above a shared pond that we use for irrigation and bathing. They also wanted to put an outhouse in the same place. I confronted them and they worked with a licensed installer and developed a contained site father away to code. All good.

But now they are blatantly not conforming to a state easement. They have also notified neighbors they are selling the home asap. This drives me a little nuts trying understand their motives, but beyond that I am wondering what others would do.

I hate to do it, but am thinking of calling the state easement manager and asking them to make a site visit.