Scilla siberica
These little flowers, Scilla siberica (Siberian squill) are similar to the blue Chionodoxa forbesii (glory of the snow) that I photographed a few days ago but can be differentiated by their downward facing appearance. They are also deeper blue, in general. In my yard they bloom just a little later, but not much. These are in a bed right by the driveway so I get to see them every time I leave or get home, which is nice. S. siberica is native to southern Russia and is hardy up to USDA Zone 2.
I also have some Scilla mischtschenkoana, (commonly called simply squill) the flowers of which are almost white with just a hint of blue. They are native to northern Iran and the Caucasus and not quite as hardy as S. siberica but still plenty hardy for us here. I really should mark where all my spring ephemerals are and plant more around them this fall. I’m not sure I could ever have too many of them.