Pygmy shrew is a shrew in north Europe. It is about 30cm in size. They are currently an endangered species in Ireland. They have the life span of about 15 months which is a varly short lifespan. they live underground in nests where they breed and expand species. this means it is quite a small species. the have one of the quickest digestive systems in the world. they have to eat food every 2 hours.