Deforestation not only eliminates trees: it is also erasing the colors of the natural landscape. In the case of butterflies, their vibrant wings, shaped over millions of years to attract mates, camouflage, and survive, are losing intensity.
A study conducted in Espírito Santo, Brazil, reveals that the simplification of the environment is causing a chromatic adaptation towards duller tones.
From tropical forests to dull monocultures
The project, led by researcher and photographer Roberto García-Roa, documents how butterflies are modifying their color patterns in response to the transformation of the landscape. In tropical forests, the reds, greens, and blues intertwine in a mosaic of life. But in eucalyptus plantations, where the environment is homogeneous and silent, browns and grays predominate.
“The colors of butterfly wings are not decorative: they are pure evolution,” explains García-Roa. “In a forest, everything vibrates. In a plantation, the emptiness is felt.”
Researchers identified 21 species in degraded areas compared to 31 in native forests, with a dominance of dull butterflies in monocultures. This phenomenon, known as “discoloration”, had already been observed in the Amazon in 2019, where the most colorful species disappear first after the loss of vegetation cover.
Chromatic erosion and ecological functions at risk
The reduction of color diversity is not just an aesthetic loss: it may indicate an erosion of key ecological functions, such as pollination, inter-species communication, and regulation of plant populations.
According to Ricardo Spaniol, a researcher at the Federal University of Rio Grande do Sul, this change is a hidden dimension of environmental impact.
“Forests are losing their colors. It’s a warning sign of how ecosystems respond to deterioration,” states Spaniol.
Causes of butterfly decline
The global decline of butterflies is due to various factors, some of which are:
- Habitat destruction: urbanization and deforestation reduce vital spaces
- Chemical pollution: pesticides affect the development of caterpillars and adults
- Climate change: alters life cycles and resource availability
- Lack of specific plants: many species depend on native flora for food
- Reduced pollination: affects the production of fruits, vegetables, and flowers
- Trophic imbalance: butterflies are food for birds, reptiles, and mammals
- Environmental indicators: their decline signals broader problems in ecosystems
Restoring butterfly color: a possible hope
The good news is that nature can regain its palette. Research in Amazonian areas that regenerated their vegetation after 30 years of livestock use showed a significant recovery in butterfly color diversity.
“We can still restore this colorful world,” assures Spaniol.
