Synonyms and other taxonomic changes
This is only a partial listing.
Papilio (Nymphalis) urticae Linnaeus, 1758. Type locality: Sweden
Aglais urticae (Linnaeus) Dalman, 1816
Vanessa urticae (Linnaeus)
Nymphalis urticae (Linnaeus)
Papilio ichnusa Hübner, 1824. Type locality: not stated, but from Sardinia & Corsica. Often treated as a distinct species or at least subspecies.
Vanessa caschmirensis Kollar, 1844. Type locality: Massuri, Caschmir. Often treated as a distinct species or at least subspecies.
Vanessa rizana Moore, 1872. Type locality: Cheeni (9000 ft), Middle Kunawur, N.W. Himalaya. Often treated as a distinct species or at least subspecies.
Vanessa ladakensis Moore, 1878. Often treated as a distinct species or at least subspecies.
Vanessa urtica nixa Grum-Grshimailo, 1890. Type locality: Darvaz Mountains, Tadjikistan. Often treated as a distinct species or at least subspecies.
Vanessa urticae chinensis Leech, 1892. Usually treated as a subspecies.
Many more names have been given as subspecies or forms.
Specimens found in eastern North America would most likely be "typical" A. urticae. Should the species show up on the west coast, it would likely be the subspecies connexa from eastern Asia.
Very similar to A. milberti, but with the orange on the upper front wings more extensive. Habits of the two species are very similar, and they are very closely related to one another (some have considered that they might be representatives of the same species from two different continents).
Open sunny areas near Nettles where there are nectar sources for the adults.
Larval food is Nettle (Urtica species), and perhaps closely related genera. Adults are avid flower visitors.
Overwinters as adults, capable of multiple broods in some regions, but only one brood in the north (much as in A. milberti).
A Eurasian species that occasionally turns up in naturalized colonies near the east coast of the United States (perhaps also eastern Canada?). It is not native here, but may have become a permanent resident. Time will tell for sure.
It is also possible (probably unlikely) that it will hybridize with native A. milberti, and become swamped out as the native population swallows it. Again, time will tell.