Mammals are considered as modern animals as they exist in diverse forms with different adaptations that make them survive in different environmental conditions. More than 5000 mammal species are alive today and they are classified under three subclasses based on their similarities. Monotremes and marsupials are the oldest mammalian groups while placental mammals are the animals adapted with more advanced features. Humans groups grouped under placental mammals. One of the small living mammals is moles that are mostly found throughout Britain. They live underground in tunnels which may or may not be permanent. The burrow tunnels of varying depths in the shallow or light sandy soils where there their prey is most concentrated. They primarily eat earthworms but also eat insect larvae that fall in to their tunnels. The maximum lifespan of moles is six years but most moles do not survive beyond three years. Like any mammal, moles posses short black furry hairs which protect them in extreme cold.
They help to keep their body temperature constant and hence called warm blooded animals. They have spade like limbs with which they dig the burrows. They don’t hibernate during winters and they are one of the busiest animals spending the most times in search of food. Male and female moles live in separate burrows. During breeding, males dig large burrows to find females. Moles are born alive and the females feed their young with milk. Three or four babies are born at a time and they are dispersed from their mother after 33 days. Hairs are grown throughout their body before they attain maturity. They breathe air and posses two lungs for the exchange of gases. Their heart consists of four chambers which make for an efficient circulatory system. The mammal, mole is treated as agricultural pests. However, they are protected in most countries.