Science
What is Convergent evolution?
Convergent evolution is when unrelated species independently evolve similar features because they face similar challenges. Wings on birds, bats, and insects, or the streamlined shapes of sharks and dolphins, evolved separately yet ended up alike.
See it, don’t just read it.
Watch a 2-minute lesson with voice + animation that explains convergent evolution.
Key things to understand
- 1Different lineages arrive at similar solutions to similar problems.
- 2The shared trait isn't inherited from a common ancestor — it evolved more than once.
- 3Examples: camera-like eyes in octopuses and humans, wings in birds and bats.
- 4It shows environments push life toward certain effective designs.
- 5It contrasts with divergent evolution, where relatives grow apart.
Frequently asked questions
- What is an example of convergent evolution?
- Sharks (fish) and dolphins (mammals) both evolved sleek, finned bodies for fast swimming, despite not being closely related.
- How is it different from sharing an ancestor?
- The similar trait wasn't inherited — each lineage evolved it independently because the same pressure favored it.
- Why does convergent evolution happen?
- Similar challenges (flying, swimming, seeing) have a limited set of good physical solutions, so natural selection finds them repeatedly.