Fig. 1. Georychus helvolus, Tawny Lemming. Natural size ; Fig. 2. Georychus trimucronatus, Back’s Lemming. Natural size.
1845-1848
Fig. 1. Georychus helvolus, Tawny Lemming. Natural size ; Fig. 2. Georychus trimucronatus, Back’s Lemming. Natural size. by John Woodhouse Audubon, 1845-1848, Nature, romanticism