We have refurbished and put out our duck nesting tubes for this season. We have 21 tubes out on 6 ponds, 14 had bits of eggshell in them from last year so they were definitely used. A pair of Egyptian geese have been around the ponds for a few years last year they nested in one of the tubes. While we were still putting out the tubes a pair actually flew in and one stood on the top of a tube and the other went inside. The nesting tubes are mainly for mallard but other ducks use them, last year a tufted duck used one of ours and mandarin ducks are becoming a problem in some places. there’s even a report of a barn owl using one.