Pigeons commonly roost and nest in rafters, lofts, towers, steeples, attics, under eaves, window sills, ledges, or roof lines. In the long run the most cost effective method to eliminate pigeons from roosting and nesting areas is to block their access with wood, metal, masonry, glass, or to screen them out with at least ¾″ mesh wire. Destruction of nests and eggs every two-weeks during the nesting season has also been effective in reducing pigeon numbers. Roosting on open ledges, window sills and roof lines can be discouraged or eliminated by using sharp spiked wire such as “porcupine wire.” This is a costly but very effective method. Less expensive methods for discouraging roosting on ledges may include wire or net coverings, electric wire devices, or using wood or shingles to increase the angle of the roost.