The image shows bird spikes, which are deterrent devices used to prevent birds from
landing or roosting on surfaces.
Purpose: They create an uneven surface that birds find uncomfortable, discouraging them
from perching.
Materials: Bird spikes are commonly made from stainless steel or polycarbonate.
Installation: They can be installed on ledges, rooflines, signs, and window sills using
adhesive, screws, or nails.
Effectiveness: Bird spikes are effective against pigeons, gulls, and other
medium-to-large birds. They are considered a humane solution as they do not harm the
birds.
Maintenance: They require minimal maintenance and can last for 15-20 years.
Limitations: Bird spikes may not be aesthetically pleasing for some and might not
deter smaller birds.