German frogs, toads etc. can’t cross the streets safely by themselves so in this time of the year (until end of April) you might see people with buckets at night picking those up.
[This page says](https://www.bund-naturschutz.de/aktionen/amphibien-retter-werden) 6000 volunteers usually do this to save 700000 frogs per year and I think that’s beautiful.