About the Poplar Admiral
The poplar admiral (Limenitis populi) is a butterfly in the Limenitidine clade of the family Nymphalidae. Poplar Admiral habitat is widespread in continental Europe and many areas in Asia. The large, seldom-seen Poplar Admiral is one of the biggest butterflies in Europe. It is found in deciduous forests, where aspen (Populus tremula) or black poplar (Populus nigra) trees grow. This is because the caterpillar only eats the leaves of these species of tree. In altitude, for instance in the Alps, where there are not large Populus forests, they accommodate with a grove, in the southeast of France they can be seen flying in large open spaces, for instance in the department of Alpes-Maritimes, as noted by Jacques Rigout. The males are easier to find. The females are rarer, because they tend to stay in the tops of the trees and seldom venture to the ground (see above).
The wingspan in spread specimens varies for the males from 66 to 77 mm, and for the females from 82 to 85 mm, all measures done on the larger private collection of Limenitis populi, now in the hands of Jean-Claude Weiss, the well-known specialist of Parnassius.
In fact the specimens in the... Wikipedia →