Midday Gerbil

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This article originally appeared in the NGS Journal, The Nibbler.

midday.jpg (39330 bytes)


This illustration is a hand-coloured 19th Century engraving by the famous bird illustrator J G Keulemans (1842-1912).

Initially I was a little confused by the print because it is captioned “Gerbillus cryptorhinus”. After some research I discovered that this is an obsolete name for The Midday Gerbil which is now classified as Meriones meridianus. I also discovered that the print was produced for a book published by the Indian Government in 1879 called "The Scientific Results of the Second Yarkand Mission: Mammalia" by William Thomas Blanford. Yarkand is a city on the Silk Road, and is now in the Western most part of China. It is not far from Kashmir and several embassies were sent to the semi-independent Amir of Yarkand in the 19th Century.

The Midday Gerbil (Meriones meridianus) is a gerbil of similar size and appearance to The Mongolian gerbil (M. unguiculatus) that we normally keep as a pet. They live in some of the same areas but have a much larger range than the Mongolian Gerbil. Midday Gerbils are common in sandy areas from Mongolia and Northern China, right across as far west as the Caspian Sea and the River Volga.

This species looks almost the same as the Mongolian Gerbil. The main differences are that the Midday Gerbil has light claws instead of the almost black claws of the Mongolian Gerbil, and their belly fur is clearly white. Wild Mongolian Gerbils have greyish belly fur which has been eliminated by selective breeding from the domestic gerbils we have now.

Midday Gerbils live in a variety of dry habitats but their favourite type of terrain is sandy desert with a regular covering of bushes. In some regions they will even live in sand dunes. This is quite rare for gerbils and there are only a few species that will live on shifting sands. In fact, Midday Gerbils appear to be the most sand loving of all the gerbils of the genus Meriones. Whilst there are Gerbils of other genera that live in these sorts of habitats, most Meriones gerbils can only live where the ground is firm enough to burrow in easily. Unlike many desert gerbils Midday Gerbils tend not to cluster around oases. In the pasture on the edges of oases they are common rodent, but in the cultivated areas where water is more plentiful, other rodents predominate.

Midday Gerbils will eat a large range of vegetation and will also eat insects when they are available. They are known to destroy tree seedlings and are considered a menace in areas where afforestation is being attempted to reduce desiccation of the soil. They are also considered a pest in many areas because, like many gerbils, their parasites include disease carrying fleas.

In general they live much like Mongolian Gerbils. They live in colonies in a burrow system and stay active all year round. The entrance to the burrow is often placed beneath a bush where that is possible. There are some significant differences from Mongolian Gerbils though. Midday Gerbils dig burrows that are much more complex than those of Mongolian gerbils. In the spring nearly all adult females have at east one litter. Following the dry period in the middle of Summer when breeding ceases, there is an autumn breeding period when only a small number of females mate. They seem to be capable of breeding all year round given moderate temperatures and a year round supply of food and water. But in the wild this is not possible. Breeding starts in March in most regions and is complete by early Autumn. Litters of between one and nine pups are known but on average a litter consists of between five and six pups.

Although I cannot find any information on their predators, I would expect that like Mongolian Gerbils they are preyed upon mainly by birds such as owls. They seem to have very short life expectancy. One study found that they were very effective at replacing the population. Whilst nearly all Midday Gerbils trapped in April are adults, 85% of those trapped in September are juveniles.


THE MAMMALS OF CHINA AND MONGOLIA: Part 2, Allen, G.M, The American Museum of Natural History, New York, 1940, Pages 781-793


SCIENTIFIC RESULTS OF THE SECOND YARKAND MISSION: MAMMALIA, Blanford W T, Office of the Superintendent of Government Printing - Calcutta, 1879

A REVISION OF THE GENUS MERIONES: Chaworth-Musters, J.L. and Ellermann, J.R., 1948, Proceedings of the general meetings for scientific Zoological Society, 1243, Pages 478-504

ECOLOGY OF DESERT RODENTS OF THE USSR (JERBOAS AND GERBILS): N P Naumov, V S Lobachev, 1975, Published as Chapter XXIII of RODENTS IN DESERT ENVIRONMENTS, Prakash, L and Gosh, P.K. (volume editors), Dr W. Junk b.v. Publishers, The Hague, ISBN 90 6193 080 4


There is a photo of the Midday Gerbil here.

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Last updated 22 September 2007