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Moles are small mammals adapted to a subterranean lifestyle (i.e., fossorial). They have cylindrical bodies, velvety fur, very small, inconspicuous ears and eyes, reduced hindlimbs and short, powerful forelimbs with large paws adapted for digging. The term "mole" is especially and most properly used for "true moles" of the Talpidae family in the order Eulipotyphla found in most parts of North America, Asia, and Europe; although it may also refer to other completely unrelated mammals of Australia and southern Africa that have also evolved the mole body plan; it is not commonly used for some talpids, such as desmans and shrew-moles, which do not quite fit the common definition of "mole".

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Terminology

In Middle English, moles were known as moldwarp. The expression "do not make a mountain out of a mole hill" - exaggerating problems - was first recorded in Tudor times. By the era of Early Modern English, the mole was also known in English as mouldywarp, a word having cognates in other Germanic languages such as German (Maulwurf), and Danish, Norwegian, Swedish and Icelandic (muldvarp, mullvad, moldvarpa), where the muld/mull/mold part of the word means soil and the varp/vad/varpa part means throw, hence "one who throws soil" or "dirt tosser".

Male moles are called "boars", females are called "sows". A group of moles is called a "labour".

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Characteristics

Underground breathing

Moles have been found to tolerate higher levels of carbon dioxide than other mammals, because their blood cells have a special form of hemoglobin, that has a higher affinity to oxygen than other forms. In addition to this, moles utilize oxygen more effectively by reusing the exhaled air, and as a result, are able to survive in low-oxygen environments such as underground burrows.

Extra thumbs

Moles have polydactyl forepaws; each has an extra thumb (also known as a prepollex) next to the regular thumb. While the mole's other digits have multiple joints, the prepollex has a single, sickle-shaped bone that develops later and differently from the other fingers during embryogenesis from a transformed sesamoid bone in the wrist, independently evolved but similar to the giant panda thumb. This supernumerary digit is species-specific, as it is not present in shrews, the mole's closest relatives. Androgenic steroids are known to affect the growth and formation of bones, and a connection is possible between this species-specific trait and the "male" genitals apparatus in female moles of many mole species (gonads with testicular and ovary tissues).

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Diet

A mole's diet primarily consists of earthworms and other small invertebrates found in the soil, and a variety of nuts. The mole runs are in reality "worm traps", the mole sensing when a worm falls into the tunnel and quickly running along to kill and eat it. Because their saliva contains a toxin that can paralyze earthworms, moles are able to store their still-living prey for later consumption. They construct special underground "larders" for just this purpose; researchers have discovered such larders with over a thousand earthworms in them. Before eating earthworms, moles pull them between their squeezed paws to force the collected earth and dirt out of the worm's gut.

The star-nosed mole can detect, catch and eat food faster than the human eye can follow.

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Breeding

Breeding season for a mole depends on species but is generally February through May. Males search for females by letting out high-pitched squeals and tunneling through foreign areas.

The gestation period of the Eastern (North America) mole (Scalopus aquaticus) is approximately 42 days. Three to five young are born, mainly in March and early April.

Townsend moles mate in February and March, and the 2-4 young are born in March and April after a gestation period of about 1 month. The Townsend mole is endangered in the United States and Canada.

Coast moles produce a litter of 2-5 pups between March and April.

Pups leave the nest 30-45 days after birth to find territories of their own.

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Social structure

Moles are solitary creatures, coming together only to mate. Territories may overlap, but moles avoid each other and males may fight fiercely if they meet.

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Classification

The family Talpidae contains all the true moles and some of their close relatives. Desmans, which are Talpidae but are not normally called "moles", are not shown below, but belong to the subfamily Talpinae (note the slightly different name). Those species called "shrew moles" represent an intermediate form between the moles and their shrew ancestors, and as such may not be fully described by the article.

On the other hand, there is no monophyletic relation between the mole and the hedgehog, both of which were previously placed in the now abandoned order Insectivora. As a result, Soricomorpha ("shrew-like animals" including moles), previously within Insectivora, has been elevated to the level of an order.

• Subfamily Scalopinae: New World moles
  • Tribe Condylurini Star-nosed mole (North America)
    • Genus Condylura: Star-nosed mole (sole species)
  • Tribe Scalopini New World moles
    • Genus Parascalops: Hairy-tailed mole (northeastern North America)
    • Genus Scalopus: Eastern mole (North America)
    • Genus Scapanulus: Gansu mole (China)
    • Genus Scapanus: Western North American moles (three species)
• Subfamily Talpinae Old World moles, desmans (not shown), and shrew moles
  • Tribe Talpini: Old World moles
    • Genus Euroscaptor: Six Asian species
    • Genus Mogera Nine species from Japan, Korea, and Eastern China
    • Genus Parascaptor: White-tailed mole, southern Asia
    • Genus Scaptochirus: Short-faced mole, China
    • Genus Talpa Ten species, Europe and western Asia
  • Tribe Scaptonychini Long-tailed mole
    • Genus Scaptonyx: Long-tailed mole (China and Myanmar)
  • Tribe Urotrichini: Japanese shrew moles
    • Genus Dymecodon: True's shrew mole
    • Genus Urotrichus: Japanese shrew mole
  • Tribe Neurotrichini New World shrew moles
    • Genus Neurotrichus: Shrew mole (American shrew mole, Pacific northwest USA, southwest British Columbia)
• Subfamily Uropsilinae: Asian shrew-like moles, (Chinese shrew moles)
  • Genus Uropsilus Four species in China, Bhutan, and Myanmar

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Other "moles"

While many groups of burrowing animals (pink fairy armadillos, tuco-tucos, mole rats, mole crickets, and mole crabs) have developed close physical similarities with moles due to convergent evolution, two of these are so similar to true moles, they are commonly called and thought of as "moles" in common English, although they are completely unrelated to true moles or to each other. These are the golden moles of southern Africa and the marsupial moles of Australia. While difficult to distinguish from each other, they are most easily distinguished from true moles by shovel-like patches on their noses, which they use in tandem with their abbreviated forepaws to swim through sandy soils.

Golden moles

The golden moles belong to the same branch on the tree of life as the tenrecs, called Tenrecomorpha, which in turn stem from a main branch of placental mammals called the Afrosoricida. This means that they share a closer common ancestor with such existing afrosoricids as elephants, manatees, and aardvarks than they do with other placental mammals, such as true Talpidae moles.

• ORDER AFROSORICIDA
  • Suborder Tenrecomorpha
    • Family Tenrecidae: tenrecs, 34 species in 10 genera
  • Suborder Chrysochloridea
    • Family Chrysochloridae
      • Subfamily Chrysochlorinae
        • Genus Carpitalpa
          • Arends' golden mole (Carpitalpa arendsi)
        • Genus Chlorotalpa
          • Duthie's golden mole (Chlorotalpa duthieae)
          • Sclater's golden mole (Chlorotalpa sclateri)
        • Genus Chrysochloris
          • Subgenus Chrysochloris
            • Cape golden mole (Chrysochloris asiatica)
            • Visagie's golden mole (Chrysochloris visagiei)
          • Subgenus Kilimatalpa
            • Stuhlmann's golden mole (Chrysochloris stuhlmanni)
        • Genus Chrysospalax
          • Giant golden mole (Chrysospalax trevelyani)
          • Rough-haired golden mole (Chrysospalax villosus)
        • Genus Cryptochloris
          • De Winton's golden mole (Cryptochloris wintoni)
          • Van Zyl's golden mole (Cryptochloris zyli)
        • Genus Eremitalpa
          • Grant's golden mole (Eremitalpa granti)
      • Subfamily Amblysominae
        • Genus Amblysomus
          • Fynbos golden mole (Amblysomus corriae)
          • Hottentot golden mole (Amblysomus hottentotus)
          • Marley's golden mole (Amblysomus marleyi)
          • Robust golden mole (Amblysomus robustus)
          • Highveld golden mole (Amblysomus septentrionalis)
        • Genus Calcochloris
          • Subgenus Huetia
            • Congo golden mole (Calcochloris leucorhinus)
          • Subgenus Calcochloris
            • Yellow golden mole (Calcochloris obtusirostris)
          • Subgenus incertae sedis
            • Somali golden mole (Calcochloris tytonis)
        • Genus Neamblysomus
          • Juliana's golden mole (Neamblysomus julianae)
          • Gunning's golden mole (Neamblysomus gunningi)

Marsupial moles

As marsupials, these moles are even more distantly related to true Talpidae moles than golden moles, both of which belong to the eutheria, or placental mammals. This means that they are more closely related to such existing Australian marsupials as kangaroos or koalas, and even to a lesser extent to American marsupials, such as opossums, than they are to placental mammals, such as golden or Talpidae moles.

Class Mammalia

• Subclass Prototheria: monotremes: echidnas and the platypus
• Subclass Theriiformes: live-bearing mammals and their prehistoric relatives
  • Infraclass Holotheria: modern live-bearing mammals and their prehistoric relatives
    • Supercohort Theria: live-bearing mammals
      • Cohort Marsupialia: marsupials
        • Magnorder Ameridelphia: New World marsupials
          • Order Didelphimorphia (opossums)
          • Order Paucituberculata (shrew opossums)
        • Superorder Australidelphia Australian marsupials
          • Order Dasyuromorphia Tasmanian devils, numbats
          • Order Peramelemorphia Bilbies and bandicoots
          • Order Diprotodontia Koalas, wombats, diprotodons, possums, cuscuses, sugar gliders, kangaroos, and many more
          • Order Notoryctemorphia Marsupial moles and closely related extinct families of marsupials
            • Family Notoryctidae Living marsupial genera and extinct marsupial mole genera
              • Genus Notoryctes Only genus of marsupial moles with existent species
                • Species Notoryctes typhlops, the southern marsupial mole
                • Species Notoryctes caurinus, the northern marsupial mole

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Interaction with humans

Pelts

Moles' pelts have a velvety texture not found in surface animals. Surface-dwelling animals tend to have longer fur with a natural tendency for the nap to lie in a particular direction, but to facilitate their burrowing lifestyle, mole pelts are short and very dense and have no particular direction to the nap. This makes it easy for moles to move backwards underground, as their fur is not "brushed the wrong way". The leather is extremely soft and supple. Queen Alexandra, the wife of Edward VII of the United Kingdom, ordered a mole-fur garment to start a fashion that would create a demand for mole fur, thereby turning what had been a serious pest problem in Scotland into a lucrative industry for the country. Hundreds of pelts are cut into rectangles and sewn together to make a coat. The natural color is taupe, (derived from the French noun taupe meaning mole) but it is readily dyed any color.

Pest status

Moles are considered agricultural pests in some countries, while in others, such as Germany, they are a protected species, but may be killed with a permit. Problems cited as caused by moles include contamination of silage with soil particles, making it unpalatable to livestock, the covering of pasture with fresh soil reducing its size and yield, damage to agricultural machinery by the exposure of stones, damage to young plants through disturbance of the soil, weed invasion of pasture through exposure of freshly tilled soil, and damage to drainage systems and watercourses. Other species such as weasels and voles may use mole tunnels to gain access to enclosed areas or plant roots.

Moles burrow and raise molehills, killing parts of lawns. They can undermine plant roots, indirectly causing damage or death. Moles do not eat plant roots.

Moles are controlled with traps such as mole-catchers, smoke bombs, and poisons such as calcium carbide. Strychnine was also used for this purpose in the past. The most common method now is Phostoxin or Talunex tablets. They contain aluminium phosphide and are inserted in the mole tunnels, where they turn into phosphine gas (not be confused with phosgene gas). More recently, high-grade nitrogen gas has proven effective at killing moles, with the added advantage of having no polluting effect to the environment.

Other common defensive measures include cat litter and blood meal, to repel the mole, or smoking its burrow. Devices are also sold to trap the mole in its burrow, when one sees the "mole hill" moving and therefore knows where the animal is, and then stabbing it. Humane traps that capture the mole alive so it may be transported elsewhere are also options.

However, in many gardens, the damage caused by moles to lawns is mostly visual, and it is also possible to simply remove the earth of the molehills as they appear, leaving their permanent galleries for the moles to continue their existence underground. However, when the tunnels are near the surface, they collapse when the ground is soft after heavy rain and leave unsightly furrows in the lawn.

Meat

William Buckland, known for eating every animal he could, opined that mole meat tastes vile.

Source of the article : Wikipedia