Part Of A Fairy Ring ?

I noticed these circles of fungi yesterday but had a lot to do .This afternoon on the way home I had a perfect chance .No idea what they are but will consult a friend in Spain. Have noted they have very thin stems and lovely gills .....Below is a link to Christoph31 a wonderful ADAC helicopter that makes all the difference .Flight be it birds or such as seen here fascinates me .....
Berlin's Helicopter Busiest in Germany