We have a nice front garden with a patch of lawn and a family of 5 Hadeda's visited every late afternoon for supper , made some droppings on the lawn and then perched on our roof and made additional dropping. Our small Yorkie, Michael regarded these dropping as his own Eau de Toilet and would roll in them necessitating frequent baths so he could be nice to be near. The roof perching also created an unsightly mess as well causing the roof paint to lift. After repainting , we installed the clear spikes with clips and this has completely eliminated the perching AND we also noticed that the Hadeda's no longer visit our lawn so fewer bath's for Michael : a double win. Also a big shout out to Craig who very swiftly replaced the incorrect clips supplied