Last year I came across several sections of 10 heating duct. Made wood duck nesting boxes out of it by cutting a 16 section, cutting the top at a 30 degree slope to shed water. Cut a hole in the front so ducks could get in, installed a plywood floor and plywood roof and attached them to metal fence post I had. Filled with shavings. Placed them along several prime nesting spots on land I owned. Best friend helped. He called me to inform me all but two of the boxes have been stolen. Who steals nesting boxes?