Hoarders, Etching, 5 inch by 7 inch

Hoarders, Etching, 5 inch by 7 inch   Ravens and crows love shiny things. I once found a crow roost, under which were spoons, aluminum foil, a pair of earrings, and many coins. 2008 researchers devised an experiment to learn more about Crow and Raven intelligence. They built a vending machine where crows could deposit coins in exchange for peanuts.                       The crows learned well.   In 2011 the owner of a company that manufactures and installs car wash systems installed one of these systems in Maryland. The buyer complained he was losing significant amounts of money each day. He even accused his company of ripping him off. The carwash owner also complained that his candy vending machine was being ransacked of its peanuts. He set up a video camera to see who was stealing all the coins. He was shocked to see several black birds climbing into the machines and carrying away coins. After following the birds, he discovered quarters on the top of a car wash and more in a tree, an estimated amount of $4,000, dozens of peanut wrappers were also discovered. The crows learned very well https://www.ted.com/talks/joshua_klein_a_thought_experiment_on_the_intelligence_of_crows?language=en