1. More Than Half of All Animal Species Are Insects
Entomologists estimate that over one million insect species have been scientifically described—accounting for more than 50% of all known animal species on Earth.
This incredible diversity means insects outnumber all other animal groups combined.
New species are discovered every year, suggesting the real number may be much higher.
Their sheer variety helps insects thrive in nearly every habitat, from rainforests to deserts, and explains their immense success in nature.