I just had The Noisy Bird event:

One day, while conducting research, Tuitui is relentlessly harassed by a noisy, squawking bird. So persistent is the bird, that it would almost seem that it is deliberately trying to disrupt research! What should she do? (A) Scare the bird away. (B) Leave the bird alone.

I scared the bird away and the bird left without doing any damage. My villager got sick, but since the text said nothing about sickness or injury, I think this could have just been a coincidence.