Ravens are one of my favorite birds and yours is excellent. I heard a story once about a man who trained ravens to put coins into a feeder that released corn for them and then he set up a bunch of the feeders on the rooftops of his city (I think it was New York?). Supposedly other Ravens started learning from the trained ones and the guy made like 2 million dollars or something, in coins from the birds. He paid taxes on the money but he was forced to remove the bird feeders because the birds started steeling money from street vendors and becoming real pests in their search for coins hahaha. I could never verify that story because I couldn't find any news on it but I always liked it. I did see a video of a man teaching Ravens to put coins in a corn feeder though and a friend on FB said that their son has been feeding Ravens on his way to school and one in particular gets excited when he sees him and even started to bring him trinkets, so maybe it is true.

If I could teach that trick to Pigeons here in France I'd be a billionaire!