Yes you can use fake rubber snakes that look realistic to scare birds away and keep the birds away form gardens and other areas you want to deter birds from.
I've used fake rubber snakes in my garden to keep birds out of the garden and it does work great.
When using rubber snakes get the rubber snakes that look the most realistic because the more real it looks the better the rubber snake will work to scare off and deter birds.
You can also place rubber snakes inside trees such as fruit trees etc where you want the birds to stay away from and the birds will see the snake and fly way.
To make it even more realistic and keep the birds from getting used to them you should move the snakes to different areas every day or every few days.
That way the birds will think that the snake has moved and is real.