Sri Lanka, like ancient Rome, has strict - albeit invisible - notions of caste and class. And class, not being exclusively human, is no less apparent within its smaller mammalian world – its rodents, and rodent-like cousins: its rats, shrews, mice, and squirrels. If the island’s tiny and elite mammalian senatorial class is represented by its elephants and leopards, its more capacious equestrian class comprises its monkeys, lorises, bears, mongooses, buffalo, anteaters, otters, jackals, hares, deer, civets, and wild cats. Which, of course, leaves the plebs. Bottom of the pyramid, they may have been, but the Roman pleb took nothing lying down. Famed for their resistance, resilience, and passion, they lived their lives with little submission or demureness. They were eminent, not intimidated. As are Sri Lanka’s rodents, whose existence is anything but deferential or docile. And numbering over 30, they make up not just over a quarter of the island’s land-living mammal species, but also 50% of its endemic species. To know them is to understand a key part of what really makes Sri Lanka Sri Lankan. Naturally, plebs had a firm pecking order all of their own and at its apex stood the Tribunes of the plebs – the People’s Tribune, which in a mammalian context can only mean the rats. Like tribunes, rats are the busy, brisk, no-nonsense influencers of what really happens or doesn’t, and they abound in Sri Lanka. Their collective poor reputation and cordial hosting of many especially nasty diseases mark them out as a mammal best enjoyed from a distance. However, as Jo Nesbo observed, "a rat is neither good nor evil. It does what a rat has to do." Two of the island’s ten rat species are endemic. Thirty centimetres in length, nose to tail, with steel grey fur and white undersides, the Ohiya Rat is named after a small village of barely 700 souls near Badulla. It lives quietly in forests and has gradually become scarcer, as biologists have counted. Its only other endemic cousin, the Nilgiri Rat, is no less endangered and is today found only in restricted highland locations such as the Knuckles, Horton Plains, and Nuwara Eliya. Little more than thirty-nine centimetres in length, nose to tail, its fur tends to be slightly redder than the typical grey of many of its relatives. Its name – Nillu, which means cease/settle/ stay/stand/stop - gives something of a clue about its willingness to get out and about. To these two are joined an embarrassment of other rat species, many common throughout the world, others restricted to South and Southeast Asia, and all much more successful in establishing an enduring dominance. These include the massive Greater Bandicoot Rat and its slightly smaller cousin, the Lesser Bandicoot Rat. Measuring almost sixty centimetres in length, nose to tail, the Greater Bandicoot Rat is known in Sri Lanka as the Pig Rat. Aggressive, highly fertile, widespread, happy to eat practically anything and an enthusiastic carrier of many diseases, it is not the sort of creature to closely befriend. A marginally smaller giant of the rat world is the Lesser Bandicoot Rat, coming in at 40 centimetres in length, nose to tail. It is found in significant numbers throughout India and Sri Lanka, and its fondness for burrowing in farmland and gardens has earned it a reputation for destruction. It can be aggressive and is a reliable host to a range of nasty diseases, including plague, typhus, leptospirosis, and salmonellosis. The Black Rat, or Rattus rattus, lives in all parts of Sri Lanka and occurs in at least five distinct subspecies: the Common House Rat, the Egyptian House Rat, the Indian House Rat, the Common Ceylon House Rat, and the Ceylon Highland Rat. None is much longer than thirty-three centimetres nose to tail, and despite their reputation for being black, they also sport the occasional lighter brown fur. They are phenomenally successful, with almost every country in the world calling them home, including Sri Lanka. They are also disconcertingly resilient transmitters of many diseases, with their blood serving as a habitat for large numbers of infectious bacteria, including those that cause the bubonic plague. Three other rats are restricted to South Asia: Blanford's Rat, the Indian Bush Rat, and the Indian Soft-Furred Rat. Indeed, Blanford's Rat, also known as the White-Tailed Wood Rat, is found in impressive numbers throughout India, Sri Lanka, and Bangladesh. Measuring thirty-five centimetres in length, nose to tail, it has the classic grey fur of the kind of rat that scares most people. The Indian Bush Rat is also found widely across India and Sri Lanka. It even boasts a tiny pocket-sized colony in Iran. At twenty-five centimetres in length, nose to tail, it is smaller than many other rats. It has rather beautiful fur that is speckled yellow, black, and reddish, as if it had wandered out of a hair salon, unable to make up its mind about which exact hair dye to ask for, ...
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