Birds nesting on outdoor metal sculptures can cause damage and unsightly droppings. To protect your artwork, consider these effective methods:

1. Install Bird Spikes: These harmless plastic or metal spikes deter birds from landing and nesting on sculptures. Place them strategically on flat surfaces.

2. Use Reflective Deterrents: Hang shiny objects like CDs or reflective tape near the sculpture. The flashing light disorients birds, keeping them away.

3. Apply Non-Toxic Repellents: Coat the sculpture with bird-safe repellent gels or sprays. These create an uncomfortable surface for birds without harming them.

4. Cover with Netting: Fine mesh netting can be draped over sculptures to physically block birds while preserving visibility.

5. Regular Maintenance: Clean the sculpture frequently to remove nesting materials before birds settle in. Motion-activated sprinklers can also scare them off.

By combining these methods, you can keep your metal sculptures bird-free while maintaining their aesthetic appeal.