Plastic Humane Anti-Bird Spikes (South Fort Collins)

Six 12” plastic spikes to prevent birds and small animals from landing, perching, or nesting on ledges, fences, and roofs.
Installed on rooflines, window sills, fences, balconies, and signs to deter pigeons, seagulls, sparrows, and small climbing animals like squirrels or raccoons without harming them.
I guess you attach them with construction adhesive, double-sided tape, or zip ties.
Porch pickup