About
Insects are the most species-rich class of animals — approximately 1 million described species, with estimates of total species ranging to 10 million. They represent 80% of all animal species and are essential for terrestrial ecosystems — as pollinators, decomposers, soil engineers, and the base of most food chains. The total biomass of all insects on Earth far exceeds that of all other animals combined.
Insect populations have declined dramatically in recent decades — a comprehensive 2019 review found 40% of insect species are in decline, with a total biomass decrease of 2.5% per year. The causes include pesticides, habitat loss, climate change, and light pollution. This 'insect apocalypse' threatens pollination services (valued at $235 billion annually), food webs, and ecosystem function.
# Top 10 Insects General facts
- 1Insects make up 80% of all animal species on Earth — they are the dominant animal group
- 2Insect populations are declining at 2.5% per year — a trajectory leading to collapse within 100 years
- 3The economic value of insect pollination services is estimated at $235 billion annually
Fascinating Facts
- ◆Insects make up 80% of all animal species on Earth — they are the dominant animal group
- ◆Insect populations are declining at 2.5% per year — a trajectory leading to collapse within 100 years
- ◆The economic value of insect pollination services is estimated at $235 billion annually
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