Identify ants

[Cryptosporidium]

Can someone help me out with identifying these ants and tell me if they are any threat to my geckos, these ants apparently came along with the cork I bought for my geckos terrarium.

When they are eating they have their abdomen raised and it looks heart shaped, Google told me acrobat ants..

https://youtu.be/ypvvu91wLuc

Need help, I really don't need a colony in my vivarium and I don't want my geckos to be harmed

[antnest8]

according to antmaps.org
There are no species of the Crematogaster genus that lives in Sweden.

Also as long as there are not a ton of ants in there then the ants are going to be nothing more than extra gecko food.

[Cryptosporidium]

The cork rolls are imported and when they was introduced to heat and moisture I got these ants crawling around. I should have asked that they are not a native species.