Spring brings life to the gardens of southern Chile, and among magnolias, azaleas, and pieris appears an emblematic visitor: the Bombus dahlbomii, known as the red bumblebee or “moscardón.” This insect, with intense orange color and a body covered in hairs, is an essential pillar in the pollination of wild and cultivated species that sustain the ecosystems of the Southern Cone.
With a buzzing and steady flight, the red bumblebee fulfills a critical ecological function: it allows the reproduction of native plants like the copihue, as well as fruit and vegetable crops, reflecting the environmental health of the landscapes in southern Chile. However, it faces a growing threat that jeopardizes its survival, according to a study by the Laboratory of Entomology at the Austral University of Chile.
The main enemy comes from the other side of the world: the Bombus terrestris, a European species introduced for agricultural purposes that invaded the local ecosystems. This more aggressive competitor not only steals floral resources but also transmits diseases that decimate the native populations.
These threats are compounded by urbanization, habitat loss, decrease in native flowers, and the effects of climate change. These factors have led to the Bombus dahlbomii being classified as “endangered” since 2016 by the International Union for Conservation of Nature (IUCN).
A natural treasure at risk
The red bumblebee is the largest native pollinator in South America, with a distribution ranging from Coquimbo to Puerto Williams. Its size and dense fur allow it to withstand the low temperatures of the southern temperate forests, where it fulfills its ecological role even on cloudy and cold days.
Unlike the European bumblebee, which usually pierces flowers to obtain nectar without pollinating them, the Chilean bumblebee performs “buzz pollination”, a behavior that effectively releases pollen and ensures plant reproduction. In this way, it contributes to the balance of unique ecosystems and the stability of the food chain.
Human actions, however, are cornering this species. The replacement of native forests with plantations, the use of pesticides, and urban expansion reduce their nesting and feeding sites. The conservation of the Bombus dahlbomii, therefore, involves protecting its natural environment and restoring native vegetation.
Small gestures also matter: promoting community orchards with aromatic plants like lavender, mint, and pennyroyal can help in their nutrition and survival. Avoiding their capture or manipulation helps reduce stress and nest destruction.
Presence in Argentina and habitat conditions
The Bombus dahlbomii is not exclusive to Chile. Its natural range extends to Argentine Patagonia, especially in the provinces of Neuquén, Río Negro, Chubut, Santa Cruz, and Tierra del Fuego. In these territories, humid forests and floral meadows offer the ideal environment for its development.
It prefers temperate and humid areas, where wildflowers and natural shelters abound. It is found from valleys to mountainous areas, nesting in hollow trunks, crevices, or abandoned burrows. Its survival depends on the availability of flowers throughout much of the year, allowing it to maintain active and healthy colonies.
However, in Argentina, it has also suffered from the invasion of Bombus terrestris, which spread from Chile across the Andes. This situation led to a drastic reduction in local populations, especially in northern Patagonia, where the species compete directly for food.
Transboundary conservation is essential. Coordination between Chile and Argentina could facilitate the creation of biological corridors and joint monitoring programs to ensure the protection of the red bumblebee throughout its natural area.
The red bumblebee, a symbol of ecological balance
The Bombus dahlbomii represents more than a threatened species: it is an indicator of environmental balance in the ecosystems of southern America. Its disappearance would mean a double loss: that of a key pollinator and that of an irreplaceable natural heritage.
Protecting it also means taking care of the forests, flowers, and clean air it shares with us. In a world facing the global decline of insects, each buzz of the red bumblebee reminds us of the urgency to restore harmony between human development and nature.
The future of this “pollination giant” depends on collective action. Preserving it is not just a matter of science but also an ethical commitment to the biodiversity of the planet.
