Huemul breeding and adaptive management
Conservation focus:
Huemul
Scientific name:
Hippocamelus bisulcus
IUCN status:
EDGE status:
EN (endangered)
Score 1.0, Rank 424 / 585 mammals
Threatened evolutionary history:
2 million years
Scientific classification:
Mammals, Artiodactyla, Cervidae

Population trend
Decreasing
Conservation attention
Low
Range

Ecological role
Being the only large ruminant herbivore in the Andean mountains, this was a keystone species when still occurring at natural densities. Its former ecological differentiation from to the guanaco (a similarly sized camelid herbivore with partly overlapping range) is not known.
Threats
One of the rarest cervids globally. Remaining population app. 1500, at very low densities and in highly fragmented populations (>100 groups spread along some 2000 km), with no signs of population growth. Due to disturbance, this species is restricted to summer ranges lacking critical trace minerals, resulting in severe health problems in most Argentinean huemul.
Grant
First awarded:
$ 12,785
10 September 2024
Score 1.0, Rank 424 / 585 mammals
Why support?
The Patagonian huemul, a South American representative of the roe deer, is only found in the southern Andes. It is so unsuspecting that it could literally be killed with a knife. Overhunting, displacement by livestock farming, conversion, fragmentation and colonization of its habitat - these classic drivers of extinction have caused the population to shrink to around 1,000 individuals today, which are dispersed into very small populations where they continue to dwindle. In Argentina in particular, the huemuls were also cut off from their vital winter habitats, which caused them to become ill (especially with bone diseases and selenium deficiency), reduced their fitness and brought their reproduction to a standstill. This project aims to remedy this situation in the long term and thus provide this super-rare endemic species with a foothold again.
Grant focus
Captive breeding for eventual release
Programme owner
Shoonem Foundation, Chubut, ARG
Programme contact
Werner Flück, PhD
Project location
Argentina
Lago Epuyén, Chubut, Argentina
Addressing the need: Project goals
Captive breeding and reintroducing huemul in formerly used winter ranges is expected to improve huemuls' health condition, allowing resumption of population growth.
The current key challenge is to reach sufficient group sizes of captive-bread huemul. This will require several years. Once reached, each year a small group may be taken from the breeding center and released in a selected reintroduction area.
In Argentina, this is the first and only initiative of this type. Until recently there had been only one breeding station for huemul, located in Chile. Their objective also was to reintroduce the species to areas where they had been exterminated in the past.
The project's main objective - reintroductions - is completely different from all other huemul conservation strategies currently employed in Argentina. These protect the species but fail to address the artificially reduced distribution due to past human impact.
Given the published results on huemul health problems from living year-round in nutritionally poor habitat, a conservation-only approach appears inadequate. So our approach relies on adaptive management, specifically via a breeding center and reintroductions. The accessibility of huemul in the center enables specific scientific studies aiming at improving the limited data available on this species so far.
Consequentially, a main need of this program is to cover the operational costs of both the breeding center and huemul studies. This involves contracting animal caretakers to work in the very remote breeding center, assure mobility, connectivity and security. Depending on the research topic, funds are also needed to cover the costs of various laboratories and technical personnel.
This project is planned to remain active until the huemul is no longer endangered as per IUCN and government criteria. This goal will require continuous funding.
Conservation actions
Captive breeding and reintroducing huemul in formerly used winter ranges is expected to improve huemuls' health condition, allowing resumption of population growth.

Endangered huemul deer have recently started reproducing in semi-captivity in Patagonia

In the Patagonian Andes of Argentina winters are challenging. This doe of the endangered huemul has found a fine resting place in deep snow.

Surprisingly, this calf, at almost 1 year of age, was still nursing. Photo by Dr. Werner Flueck, December 2024.

Endangered huemul deer have recently started reproducing in semi-captivity in Patagonia