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Octodonts: Octodontidae - Degu (octodon Degus): Species Account

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Physical characteristics: Degus, also called trumpet-tailed rats, are similar in body size and appearance to gerbils, except for the fact that their faces share more of a resemblance with squirrels. They have chubby, round bodies, large heads and short necks. The head and body length of degus are from 9.8 to 12.2 inches (25 to 31 centimeters, with a tail length of 2.9 to 5.1 inches (7.5 to 13.0 centimeters. They weigh 6 to 10.5 ounces (170 to 300 grams).

They have long whiskers and relatively long tails that have very little hair, except for a tuft of fur at the tip. The degus' rear legs are slightly shorter than their front legs. They have four clawed toes on their front paws and five on their back paws. Degus have yellow or brown fur mixed with some black on their upper bodies, and white fur on their underside. Their teeth are bright orange.

Degus eat mostly plants, and search for their food in the early morning and early evening. (© Fletcher & Baylis/Photo Researchers, Inc. Reproduced by permission.)

Geographic range: In Chile, from the coastal areas of the west slopes of the Andes Mountains to about 9,000 feet (2,700 meters).


Habitat: Degus live in the brush, shrubs, and grassy plains of grasslands and deciduous forests.


Diet: Degus are herbivores, meaning they eat only plants. They eat mainly during the early morning and early evening. Their diet consists mainly of grass, leaves, herbs, bark, and seeds.


Behavior and reproduction: Degus are extremely social and live in groups of five to ten adults and their young. They groom each other, lay bunched together when sleeping, and the females nurse each other's babies. A degu group builds burrows consisting of many branched tunnels and multiple entrances. When digging a burrow, the adults form a chain that speeds up the activity.

Degus are diurnal. In the wild, they live about one to three years. In captivity, their average lifespan is five to nine years, with some reportedly living up to thirteen years.

Degus usually breed twice a year. Females are sexually mature, able to bear offspring, at six months. Litters usually consist of four to nine babies.


Degus and people: Degus are used for laboratory research. They are also sold as pets in the United States. In the wild, degus are often killed by farmers who consider them to be agricultural pests, blaming them for destroying grain fields, orchards, and vineyards.


Conservation status: Degus are not listed as threatened by the IUCN. ∎

FOR MORE INFORMATION

Books:

Boruchowitz, David. The Guide to Owning a Degu. Champaign, IL: TFH Publications, 2002.

Griffiths-Irwin, Diane, and Julie Davis. How to Care for Your Degu. Champaign, IL: TFH Publications, 2001.

Macdonald, David. The New Encyclopedia of Mammals. Oxford, U.K.: Oxford University Press, 2001.

Nowak, Ronald M. Walker's Mammals of the World, 6th ed. Baltimore: Johns Hopkins University Press, 1999.

Vanderlip, Sharon (DVM), and Michele Earle-Bridges. Degus. Hauppauge, NY: Barrons Educational Series, 2001.


Periodicals:

Bacigalupe, Leonardo D., et al. "Activity and Space Use by Degus: A Trade-Off Between Thermal Conditions and Food Availability?" Journal of Mammalogy (February 2003): 331–318.

Begall, Sabine, et al. "Activity Patterns in a Subterranean Social Rodent, Spalacopus cyanus (Octodontidae)." Journal of Mammalogy (February 2002): 153–158.

Begall, Sabine, and Milton H. Gallardo. "Spalacopus cyanus (Rodentia: Octodontidae): An Extremist in Tunnel Constructing and Food Storing Among Subterranean Mammals." Journal of Zoology (May 2000): 53–60.

Gallardo, M. H., and F. Mondaca. "The Systematics of Aconaemys (Rodentia, Octodontidae) and the Distribution of A. sagei in Chile." Mammalian Biology (April 2002): 105–112.

Kenagy, G. J., et al. "Microstructure of Summer Activity Bouts of Degus in a Thermally Heterogeneous Habitat." Journal of Mammalogy (April 2004): 260–267.

Torres-Mura, Juan C., and Luis C. Contreras. "Spalacopus cyanus." Mammalian Species(December 4, 1998): 1–5.

Woods, Charles A., and David K. Boraker. "Octodon degus." Mammalian Species (November 21, 1975): 1–5.

Web sites:

Cloyd, Emily. "Octodon degus." Animal Diversity Web. http://animaldiversity.ummz.umich.edu/site/accounts/information/Octodon_degus.html (accessed on July 12, 2004).

Myers, Phil. "Family Octodontidae." Animal Diversity Web. http://animaldiversity.ummz.umich.edu/site/accounts/information/Octodontidae.html (accessed on July 12, 2004).

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