Andrena tricolor Imhoff, 1832; Andrena dispar Zetterstedt, 1838; Andrena polita Schenck, 1861.
This is often the first solitary species of bee to be found in the spring, sometimes flying in mid February. As with many of the early spring bees, A. clarkella forages almost exclusively from sallow blossom.
Local but very widely distributed throughout the British Isles. In Britain the range extends north to East Inverness. In Ireland it is widespread across central areas. Also recorded from the Isle of Man and the Channel Islands. This bee is Holarctic. In Europe, it occurs mainly in the north, from Swedish Lapland and northern Finland east to Russia, and in Turkey. In North America it is found from Alaska to Ontario and south to Colorado.