#1
Hello!
Yesterday I made a peculiar observation of a small insect following an
Andrena bee (most likely
A. nitida) whereever this flew - in some centimeters distance, even when the bee made strong turns. (Northwest Germany.)
When the insect landed on grass halm, I recognized that it was a little (5-6 mm) fly looking like the
Leucophora from the house wall, Michael Ackland identified for me some days ago.
When googling, I found that these flies are called "satellite flies" in English, because the indeed follow mining bees to gain access to their breeding tubes.