I have never seen this. A female mallard landed on the top of the Martin house & for a while I wasn't sure if she was going to get off. The Martins tried to dive-bomb her with no success. All she did was squawk at them. They finally settled for one standing on each side of the roof with the females standing in front of the doors to their nests. Eventually she got tired of standing up there & flew off. Her mate joined her in the lake. Later saw the two of them being chased by another Drake. Have no idea why she thought the top of the Martin house was a good place to land.