Steven from Tx writes
The Bird Barrier Pro-Cone Corner acts as an exclusion device because of its shape and material. The cone is narrower at the outside opening so that animals cannot enter from that end. It is also a smooth plastic material that is very difficult for any animals to grasp. Keep in mind that this device is designed primarily for birds and bats, which would be able to fly out of the structure.
Answer last updated on: 12/28/2016