Squirrel 2730 was a male hybrid flying squirrel captured near Dorset, Ontario in 2003. It weighed 67 g, and had G. volans mitochondrial DNA.
Squirrel 273 was a likely backcrossed flying squirrel. This male squirrel weighed 74 g, and was captured in Pennsylvania in 2002. He was assigned with 0.86 probability to G. volans based on microsatellites, and had G. volans mitochondrial DNA, but also the typical gray belly fur of G. sabrinus.