|A wood pigeon|
You may not see pigeons actually attacking plants as they often visit in the early morning.
Damage may include torn leaves and in severe cases leaves may be striped down to leaf stalks. Droppings also make preparing for cooking a tedious task.
Some take to shooting pigeons, which can then be cooked and eaten, however this is not always possible or safe. Bird scarers offer limited protection. The only certain way to protect is to net plants.