Why do mosquitoes buzz near ears?

Answer: Detecting CO2 you exhale

Ears produce special heat — Wrong. Ears aren't particularly warm. Mosquitoes buzz near your head because they're following CO2 from breathing and heat signatures—ears just happen to be there.

Attracted to ear wax smell — Wrong. Mosquitoes don't seek ear wax. They're attracted to carbon dioxide from exhaled breath, which leads them to your head area where they detect ears.

Detecting CO2 you exhale ✓ — Correct! You breathe out CO2 through your nose and mouth. Mosquitoes can detect CO2 from 30+ meters away. They follow this chemical trail to your head, then use heat sensors to find exposed skin. The annoying buzz is just their wing frequency as they hunt near your face!