Diario del proyecto Megachile sculpturalis in Europe

According to new scientific evidence, the immigration of M. sculpturalis occurs in several waves:

https://bmcecolevol.biomedcentral.com/articles/10.1186/s12862-020-01729-x

Under the link you will find the confirmed observations of Paul Westrich in Germany in 2020. Described and entered on a map. (in german).

https://www.wildbienen.info/forschung/projekte_20.php