It was during a walk in Vargön outside Vänersborg on Monday evening that a person interested in birds saw it - the rare ruby nightingale.
The next morning, several hundred people had gathered to catch a glimpse of it.
- This is a dream bird for very many, says Niklas Aronsson, editor of Vår fågelvärld.
This is the second time the bird has been seen in Sweden.
- It is a very charismatic species that has long been high on the birdwatchers' wish list, Niklas Aronsson continues.
Has gone wrong
The bird comes from the east in Siberia.
And it happens that it ends up wrong, now it is probably on its way to the southwest and will fly on only in clearer weather.
- Birds stay if it is overcast and rainy.
They need clear nights to stretch further.
They fly at night and need the starry sky to navigate.