This is photo is of Emily Belknap’s installation “Flight Zones”:
Flight initiation distance measures how close you can get to wildlife before you trigger an animal’s need to escape. Belknap hasn’t so much visualized this distance as made the zone palpable: if you were to step into the circle you’d disturb the dirt and become aware you were crossing a boundary.
It’s commonly called flight initiation distance (or FID, because people seem to love inscrutable to outsiders acronyms) even though it applies to wildlife in general, not just birds. I think it applies to animals in general, meaning us peopley animals, too. I wonder what our FIDs might look like.