I thought existing bird spikes are making a hostile environment for animals in cities and wanted to suggest gentler design that people and animal can coexist in urban environments.
the design is a sort of mobile consist of frame, sticks, and a thread across between two frame stands. the shape of sticks are taken after natural elements such as dunes, waves, sunlights and wind.
When birds are trying to perch on the devices , the sticks will be swung, naturally making the birds hard to balance on