The black-yellow-striped beetle is very rare - it only lives in about ten places in the country.
In Stockholm County, it was until recently only in the National City Park.
- We were very happy to find it here in Viggbyholm, says Yolanda Karlsson, ecologist in Täby municipality.
Endangered beetle
A few years ago, the endangered broad-banded oak bark beetle was also found in Solna.
And during this year's insect inventory, it has also crept into scent traps in Björkhagen, Sundbyberg, Upplands Väsby and Täby.
- This may indicate that it is about to spread, which is good, says Yolanda Karlsson with a smile.
Start the video to find out why ecologists are so happy that the broad-banded oak bark beetle is spreading.