by Cristian Solari
0 
Andrena clarkella (+) Pollination (+) Salix cinerea
Observation
From Steven Falk @StevenFalk1: in southern Britain we have four mining bee species that only collect pollen from willows (especially Grey Willow & Goat Willow) - Andrena clarkella, A. praecox, A. apicata & A. vaga.
Check this link for more information.
