Trash Lovers
We humans make so much trash, which is what we call the things we don't want and that we assume disappear once we put it in a can.
Our trash is treasure to crows, and probably, most famously, pigeons.
Here's a short and a long documentary about kinds of creatures who eats up our scraps:
sTo Len was a Public Artist In Residence in the department of sanitation in NYC for two years, as was Rania Ho at Recology in SF and Anne Ishii at RAIR in Philly. I love these portals into waste management systems (which you can also visit on your own sometime, many give tours! Paris even has a Musée des Egouts, a sewers museum ;)
And then there's near-eternal nuclear waste... and three projects (two feature documentaries and a website) about the lasting impact on the people, landscapes, and geopolitics of burying this waste.