Southern Pudu facts and threats in Chile and Argentina

Learn about fascinating Southern Pudu facts. And why the world’s second smallest deer is so important to South America’s temperate forests. Darting through dense undergrowth and hiding on the forest floor, the Southern Pudu, AKA the Püdü in Mapudungun, is the world’s second smallest deer species and is adapted to life in woodland habitats. Weighing only 6.4 to 13.4 kg and standing 35 to 45 cm at the shoulder, tiny Pudus communicate through scent, while their short, slightly backward-curving antlers and thick chestnut-brown coat help them survive in dense forest cover.

Southern Pudu Pudu puda

IUCN Status: Near Threatened

Location: Chile, Argentina

Southern Pudu habitat

Southern Pudu habitat spans the threatened temperate forests of Chile and Argentina, where this resilient ungulate depends on dense vegetation, bamboo thickets, and forest understory for shelter and movement. Yet despite these adaptations, Southern Pudu populations are under growing pressure from habitat destruction linked to eucalyptus and pine monocultures, predation by invasive species, road collisions, disease transmission from livestock, and poaching. This article explores Southern Pudu facts, habitat, behaviour, and the key threats driving the decline of one of South America’s most elusive forest deer

Appearance and behaviour

Southern Pudus are a stocky tiny deer species with short legs, rounded ears, and large, dark eyes. Their small antlers, present only in males, measure between 5.3 and 9 cm and are shed annually. Their dense fur varies from reddish-brown to dark brown, often appearing darker in winter.

Unlike many other ungulate species, Pudus are solitary and highly secretive. They are mostly crepuscular, active mostly during dawn and dusk, and use scent-marking to communicate with other individuals. They rely on zigzagging escape routes through dense undergrowth to evade predators, making them difficult to spot in the wild.

Threats

Southern Pudu populations face multiple threats that have led to drastic declines in recent decades.

1. Habitat Loss and Deforestation

• Widespread forest clearance: Nearly 50% of the Valdivian temperate rainforest has been destroyed since 1550, with severe deforestation in the Maule and Araucanía regions.
• Deforestation for agriculture: Native forests are being replaced with monoculture plantations (eucalyptus, pine), cattle ranching, and agriculture, significantly reducing their available habitat.
• Fragmentation of remaining forests: The loss of continuous forest corridors isolates populations, leading to inbreeding and reduced genetic diversity.

2. Predation and Competition with Invasive Species

Free-ranging dogs attack and kill Pudus, even inside protected areas. Invasive deer and wild boar species compete for food and damage the undergrowth that Pudus rely on for shelter.

3. Road Development and Vehicle Collisions

Increasing road networks in Chile and Argentina have led to frequent roadkill incidents, including deaths inside national parks. The planned Chiloé-Mainland bridge could expose isolated Chiloé populations to new predators and human disturbances.

4. Disease Transmission from Livestock

Livestock diseases, including pestivirus, Leptospira, and bovine tuberculosis, are increasingly affecting wild Pudu populations. The presence of cattle-related pathogens has been documented, though their full impact is still being studied.

5. Illegal Poaching and Capture for the Pet Trade

Hunting for food still occurs in some rural areas. Some Pudus are illegally captured and sold in the exotic pet trade, despite their poor survival rate in captivity.

Geographic Range

Southern Pudu habitat is found in the temperate rainforests of southern Chile and southwestern Argentina, primarily within the Valdivian temperate forest. This elusive deer inhabits dense forests with thick underbrush, bamboo thickets, and Nothofagus-dominated woodlands, where they can navigate the understory with ease.

Diet

Like other deer species, Southern Pudus are browsing herbivores, feeding on a wide variety of shrubs, vines, bamboo shoots, ferns, leaves, and fallen fruit. Due to their small stature, they employ clever techniques to access food, including standing on their hind legs, bending saplings, or even climbing on logs and rocks to reach foliage. They obtain much of their moisture from their diet and can survive without drinking water for extended periods.

Mating and reproduction

Mating season occurs during the Southern Hemisphere’s autumn (April to May). Males engage in territorial scent-marking but do not form harems. The gestation period for these miniature deers lasts approximately 210 days, with fawns typically born between November and January.

At birth, fawns weigh between 700 and 1,000 grams and have white-spotted coats for camouflage. They are weaned after two months but may remain with their mother for up to a year. Sexual maturity is reached at six months for females and 8–12 months for males.

FAQs

Take Action!

• Support conservation organisations that work to protect the Valdivian temperate forest.
• Advocate against the pet trade – Pudus are wild animals and they belong free in the wild, not kept as pets!
• Promote stricter regulations on free-roaming dogs in national parks.
• Raise awareness about the threats posed by deforestation and invasive species by sharing this post to social media. Use the one-click shares at the top of this post.

The Southern Pudu may be small, but their role in the biodiversity of South American forests is crucial. Protecting them means preserving one of the last temperate rainforests on Earth.

Support Southern Pudu by going vegan and boycotting deforestation causing commodities in the supermarket, it’s the #Boycott4Wildlife

Support the conservation of this species

This animal has no protections in place. Read about other forgotten species here. Create art to support this forgotten animal or raise awareness about them by sharing this post and using the #Boycottpalmoil #Boycott4Wildlife hashtags on social media. Also you can boycott palm oil in the supermarket.

Further Information

Hidalgo-Hermoso, E., et al. (2024). High exposure to livestock pathogens in Southern Pudu (Pudu puda) from Chile. Animals, 14(4), 526. https://doi.org/10.3390/ani14040526

Silva-Rodríguez, E. A., et al. (2011). Priorities for the conservation of the Pudu (Pudu puda) in southern South America. Animal Production Science, 51(4), 375-377. https://doi.org/10.1071/AN10286

Silva-Rodríguez, E, Pastore, H. & Jiménez, J. 2016. Pudu puda. The IUCN Red List of Threatened Species 2016: e.T18848A22164089. https://dx.doi.org/10.2305/IUCN.UK.2016-1.RLTS.T18848A22164089.en. Accessed on 26 February 2025.

Wikipedia contributors. (n.d.). Southern Pudu. Wikipedia, The Free Encyclopedia. https://en.wikipedia.org/wiki/Southern_pudu

Zúñiga, A. H., & Jiménez, J. E. (2018). Activity patterns and habitat use of Pudu deer (Pudu puda) in a mountain forest of south-central Chile. Journal of Natural History, 52(33-34), 2047-2054. https://doi.org/10.1080/00222933.2018.1510995

---

---