You need to understand what a 'pest' is. Without knowing the definition your question does not ask what you want it to ask.
The term 'pest' is used to describe any animal being where humans do not want it. So, for example bees are very important pollinators but if you found a bees' nest in your loft you would count them as pests.
It is not possible to simply say such and such a species is a pest. A cow in the field at the farm is not a pest. It could be a source of milk from which we get milk, cream, butter, yoghurt, cheese and other dairy produce. However, a cow in your front garden eating your prize blooms that you have grown from seed would definitely be a pest.