The Himalayan tahr (Hemitragus jemlahicus) is a large even-toed ungulate native to the Himalayas in southern Tibet, northern India, western Bhutan and Nepal.

[5] The word "tahr," first used in English writings in 1835, is derived from the animal's local name in the Western Himalayas, which has otherwise been rendered as "tehr," "tare" and "tahir".

They have adapted the unique ability to grasp both smooth and rough surfaces that are typical of the mountainous terrain on which they reside.

[11] The Himalayan tahr is adapted to life in a cool climate with rocky terrain, which allows them to be found in mountainous areas.

In other words, their ability to digest a large range of vegetation allows the Himalayan tahr to have a bigger fundamental niche, and as a result, increases their success as an invasive species.

[18] Lastly, the Himalayan tahr lacks predators in the regions where it has been introduced, so is only limited by access to food and water, and its own reproductive rate.

Himalayan tahr were introduced to New Zealand in 1904 around the Mount Cook region for sport and have since expanded rapidly into neighboring areas.

Hughey and Karen M. Wason presented the results of a survey conducted among 43 farmers living within tahr distribution.

[25] Also, a 1988 study showed that hunters spent $851 per person per year on hunting, with expenses being greatest for big-game targets, such as the Himalayan tahr.

[26] Tahr could be eradicated from New Zealand but "this has not happened due to intense lobbying pressure from hunting interests, so ongoing ecological costs are incurred by the natural environment.

[31][32][33] A negative impact the Himalayan tahrs have on their environment is increased herbivory on the native vegetation of the ecosystem, which can make it harder for other herbivores to find food.

The increased herbivory can also lead to a decrease in soil nutrients, such as oxygen, nitrates, and ammonia, resulting in positive feedback loop, making it harder for plants to grow at all.

This increase has also resulted in poor soil quality in many environments occupied by the Himalayan tahr and has severely limited the presence of certain plant species.

Without regulated hunting or the presence of natural barriers, the Himalayan tahr can pose a large threat to the indigenous fauna and flora populations within the area.

The control of tahr remains ecologically and economically significant because of their widespread destruction of native flora and fauna and their valuable capture for hunters, respectively.

The management unit has a fixed maximum density, which varies from 1–2.5 tahr/km2 and is considered to be low enough to have a minimal negative impact on the ecosystem and, even, restore native vegetation.

[39] In the soil, sodium monofluoroacetate is converted by bacteria and fungi to metabolic products, shown to be nonhazardous to the environment.

[40] According to Australia's Department of Primary Industries, Parks, Water, and Environment,[38] mammals (particularly cats and dogs) are the most susceptible to compound 1080 poisoning.

[38] Although compound 1080 is a strong enough pesticide to eradicate the entire tahr population, political pressures from hunter groups hinder its use.

Opposition by the general public also contributes to the decreased use of 1080 with concerns that the accumulation of 1080 at higher levels of the food chain will pose danger to mammals such as dogs, deer and pigs.

Subsequent populations of tahrs have descended from the original escaped pair and spread quickly over the Cape Peninsular mountain range.