In the mid-20th century, China pushed for an accelerated transformation. The plan sought to overcome centuries of backwardness through massive actions, which led to nature being subordinated to urgent political decisions, resulting in the loss of birds.
Within that strategy, a campaign against species considered pests was launched, with mosquitoes, rats, and flies as the first targets. Later, sparrows were added, accused of damaging crops.
The elimination was systematic and almost total. The country celebrated the apparent initial success, but the ecological balance was already broken.
When the absence of birds triggers collapse
Sparrows not only consumed seeds but also regulated populations of agricultural insects, so their disappearance freed the pests.
This caused locusts and other insects to multiply uncontrollably, leaving crops exposed to massive attacks, not to mention widespread agricultural losses.
Between 1958 and 1962, China suffered a devastating famine. At that time, millions of people died due to food shortages. The ecological damage had an extreme human cost.
A pattern that repeats in the present
Decades later, the warning remains relevant, as bird populations decline worldwide, a phenomenon widely documented.
In Spain, monitoring shows alarming declines. Many common species have entered a sustained decline, even traditional urban birds have lost presence.
Nocturnal birds present the most critical situation, as more than half of the species are reducing their populations, and the silence of the landscape becomes an ecological symptom.
Land use change and environmental fragility
The transformation of the territory is the main factor. Intensive agriculture, urbanization, and deforestation alter habitats, causing birds to lose shelter, food, and breeding spaces.
Different global studies analyzed thousands of species, evaluating traits linked to key ecological functions. The results show a functional loss, not just numerical.
When certain types of birds disappear, ecosystems weaken. They lose the ability to withstand disturbances and their recovery from new crises diminishes.
The role of birds in ecosystems
Birds are central pieces of the natural balance, as they disperse seeds and facilitate plant regeneration, while maintaining the diversity of forests and grasslands.
Many species control insect pests, reducing the need for agrochemicals and protecting agricultural productivity naturally.
They also connect ecosystems on a large scale. Their migrations transfer energy and nutrients, as without birds, ecological systems lose stability.
Learning from the past to avoid new collapses
History shows that eliminating birds has profound consequences. It’s not just about conserving species, but also about the functioning of nature.
Protecting birds involves caring for habitats and land uses, as well as rethinking productive models. In this sense, biodiversity is an ally, not an obstacle.
Ignoring these signals repeats historical mistakes, as ecology does not allow shortcuts. Preserving birds is preserving the life they sustain.
