Top 10 Deadliest Insects in the World Based on the Harm They Cause to Humans


Spread diseases such as malaria, dengue, yellow fever, and Zika virus.

Tsetse Flies

Spread sleeping sickness in humans and livestock.

Kissing Bugs

Spread Chagas disease through their bite and feces.

Assassin Bugs

Spread diseases such as Chagas disease, dengue, and yellow fever.

Can cause serious allergic reactions in some people, leading to death in rare cases.

Bees and Wasps

Fire Ants

Their bites can cause painful swelling, and in severe cases, lead to anaphylactic shock.


Their venom can cause serious injury or death in humans, especially children and the elderly.


Some species, such as the funnel web spider and the black widow, have venom that can be fatal to humans.


Their venom can cause intense pain, swelling, and in rare cases, death.


They can trigger allergies and asthma in some people, and also spread diseases through their contaminated body parts and feces.