Transparent bird gel:
This gel comes specifically for the purpose of keeping away birds from landing on your property. This gel is available in tubes and can be applied using a caulking gun. One tube can easily caulk an area of 10 feet long by 3 inches wide. The gel is effective for up to six months and is very effective in keeping away birds.
Birds can be deterred from landing on the roof line using spikes, made especially for this purpose. These spikes make landing on the roof line extremely uncomfortable but have blunted points and do not cause any injury. So the birds, you and your pet are safe. They come in both steel and plastic and also in a variety of colors to match your roof line. Get spikes according to the color of your exterior paint according to the aesthetic sense.
When you install these devices on your window sills and roof lines, they keep a watch on all bird movement and sound near them. When they sense a bird landing or roosting, they emit shrill noises that make the bird fly away. These noises are usually sounds bird predators to make them fearful and flee and keep altering so that the birds do not get the trick. Noises like a hawk screeching are enough to give the birds a blast. These sounds are extremely effective against pigeons, crows and gulls.