8 Magnificent Facts About Mongooses

A mongoose is a small, dynamic mammal with a long body and short legs. Mongooses are famous for standing their ground against venomous snakes, both in literature and in real life, but they're also complex creatures with many other interesting quirks.

Here are a few things you may not know about mongooses.

1. The Plural Is 'Mongooses,' But It's OK to Say 'Mongeese'

Since English speakers are accustomed to the plural of "goose" being "geese," it might feel strange to say "mongooses" when referring to more than one mongoose. "Mongooses" is indeed the correct plural form, but some dictionaries also recognize "mongeese" as an alternative.

So why is "goose" in the word "mongoose" in the first place? The animal's name may have come from mangus in Marathi and Tamil, mangisu in Telugu, or mungisi in Kanarese. The current English spelling is believed to have arisen from folk etymology, according to Etymology Online.

2. There Are About 30 Mongoose Species Around the World

Mongooses belong to the taxonomic family Herpestidae, which includes some 30 species across 20 genera. They're native to Africa, Asia, and southern Europe, but some species have also spread beyond their native range. Mongooses vary in size from the dwarf mongoose, which measures about eight inches long and weighs less than a pound, to the white-tailed mongoose, which can grow to a little more than two feet in length and weigh 9 pounds.

Mongooses are closely related to civets, genets, and euplerids. The latter is a group of carnivores from Madagascar that includes the cougar-like fossa.

3. They Have a Few Tricks for Defeating Venomous Snakes

Humans have long admired mongooses for the animals' ability to kill venomous snakes, including cobras and adders. This trait was also famously dramatized by Rudyard Kipling in his 1894 short story "Rikki-Tikki-Tavi," in which the titular mongoose saves a human family from villainous cobras.

Mongooses are formidable opponents for snakes largely because of speed and agility, which helps the mongoose avoid the reptiles' fangs and launch quick attacks when sensing an opening. But some mongoose species also have an extra advantage: They've evolved resistance to neurotoxic snake venom and keep fighting even after receiving a bite that would kill most animals their size. They're not immune to the venom, but thanks to special mutations in their nervous system, the neurotoxin has difficulty binding to their nicotinic acetylcholine receptors, rendering it less effective.

4. They Have Diverse Diets

Mongooses are mainly carnivorous, but they're known to supplement their diets with plant matter. Despite their defenses against venomous snakes like cobras, mongooses often target smaller, simpler animals as prey. A mongoose diet may include insects, earthworms, crabs, rodents, birds, lizards, and snakes, as well as both bird and reptile eggs.

5. Some Species Are Semiaquatic

Mongooses have adapted to a wide array of habitats around the world, from deserts to tropical forests. They can even be semiaquatic, proving adept in the water as they hunt fish, crabs, and other aquatic prey. The marsh mongoose, for one, is reportedly an excellent swimmer that can dive for 15 seconds at a time while hunting.

6. Some Are Loners, Some Live in Mobs

Many mongooses live solitary lives, while others form sophisticated communities. Meerkats, one of the most famous mongoose species, are well known for their social groups of up to 50 members, known as "mobs."

A meerkat mob consists of several family groups, typically centered around one dominant pair. Members of the mob perform various jobs, such as foraging for food, taking care of babies, or watching out for predators (the lookout mongooses will sound an alarm if trouble is approaching so all animals in the mob can flee or confront the threat as a group).

7. Mongoose Communication Can Be Surprisingly Complex

Some mongoose species have relatively advanced communication skills. Meerkats make at least 10 calls with various meanings, from murmurs and growls to clucks, spits, and barks. The banded mongoose, whose calls may sound like simple grunts, can combine discrete units of sound similar to the way humans use a consonant and a vowel to form a syllable.

"The first portion of the call provides cues to the identity of the caller, and the second part encodes its current activity," researchers reported in the journal BMC Biology. "This provides the first example known in animals of something akin to the consonants and vowels of human speech."

8. They Can Wreak Havoc Outside Their Native Habitats

Humans have sometimes introduced mongooses to new habitats in hopes of controlling snakes and pests like rats. These types of plans have usually backfired. Often, the mongooses not only fail to stop the pests but also become an invasive species, causing more trouble than the snakes or rats ever did.

The Javan mongoose, for example, was introduced to many tropical islands around the world in the 19th century, often to control rats at sugar cane plantations. The animal went on to decimate native birds in Hawaii, and it remains a problem on every Hawaiian island but Lanai and Kauai. Similar results played out around the world, from Fiji to the Caribbean.

In 1910, the Javan mongoose was brought to Okinawa to help control the venomous habu, a native pit viper. But the snakes are nocturnal while the mongooses are active during the day, so the two species didn't cross paths often enough. Instead, the mongooses began to prey on other native wildlife, including endangered species like the Okinawa rail.

Given the threat of invasion, mongooses are banned in many places outside their native range, including the United States and New Zealand.