''Venusia cambrica'', the Welsh wave, is a

moth Moths are a paraphyletic group of insects that includes all members of the order Lepidoptera that are not butterflies, with moths making up the vast majority of the order. There are thought to be approximately 160,000 species of moth, many of w ...

of the family Geometridae. It is found in Europe, western and central

Siberia Siberia ( ; rus, Сибирь, r=Sibir', p=sʲɪˈbʲirʲ, a=Ru-Сибирь.ogg) is an extensive geographical region, constituting all of North Asia, from the Ural Mountains in the west to the Pacific Ocean in the east. It has been a part of ...

, Altai,

Transbaikalia Transbaikal, Trans-Baikal, Transbaikalia ( rus, Забайка́лье, r=Zabaykalye, p=zəbɐjˈkalʲjɪ), or Dauria (, ''Dauriya'') is a mountainous region to the east of or "beyond" (trans-) Lake Baikal in Far Eastern Russia. The steppe and ...

, the

Russian Far East The Russian Far East (russian: Дальний Восток России, r=Dal'niy Vostok Rossii, p=ˈdalʲnʲɪj vɐˈstok rɐˈsʲiɪ) is a region in Northeast Asia. It is the easternmost part of Russia and the Asian continent; and is admini ...

, the

Korean Peninsula Korea ( ko, 한국, or , ) is a peninsular region in East Asia. Since 1945, it has been divided at or near the 38th parallel, with North Korea (Democratic People's Republic of Korea) comprising its northern half and South Korea (Republic o ...

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

and in North America, where it can be found across

Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...

from

Newfoundland and Labrador Newfoundland and Labrador (; french: Terre-Neuve-et-Labrador; frequently abbreviated as NL) is the easternmost province of Canada, in the country's Atlantic region. The province comprises the island of Newfoundland and the continental region ...

British Columbia British Columbia (commonly abbreviated as BC) is the westernmost province of Canada, situated between the Pacific Ocean and the Rocky Mountains. It has a diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, ...

, south in the west to

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

, south in the east to Georgia. The

wingspan The wingspan (or just span) of a bird or an airplane is the distance from one wingtip to the other wingtip. For example, the Boeing 777–200 has a wingspan of , and a wandering albatross (''Diomedea exulans'') caught in 1965 had a wingspan of ...

is 27–30 mm. The light grey front wing has black and brown cross lines. Two protruding black lines at the outer black cross line, near the middle of the wing, are the most striking characteristic. "Quite distinct. The black marks on the 3rd radial and 1st median distally to the outer line recall ''Oporinia''. English specimens and (according to Herz) the Korean form are on an average rather less white, than those from Scotland and continental Europe. In general the female is slightly larger and paler than the male - ab. ''pygmaea'' Tystr. is small with the central area constricted. - ab. ''latefasciata'' Strand has the median area very broad, the lines which bound it are parallel, not approximated in the posterior part. - ab. ''webbi'' Prout has the markings almcst obliterated excepting at the costal margin and on the median vein and its branches, recalling ''Oporinia antumnata gueneata'' See Oporinia gueneata -ab. ''bradyi'' Prout has both wings uniformly suffused with dark smoke-colour, and is becoming frequent in the Sheffield district. -ab. ''lofthousei'' Prout is a quite different melanotic form from ab. ''bradyi''; forewing suffused with smoke-colour but remaining longitudinally rayed with white in the distal area, hindwing not infuscated. Only known from North Yorkshire.Prout, L. B. 1912–16. Geometridae. In A. Seitz (ed.) The Macrolepidoptera of the World. ''The Palaearctic Geometridae'', 4. 479 pp. Alfred Kernen, Stuttgart. The larva is long and slender, with a few short setae. It is green with large, purple spots on the back and sides. Adults are on wing from July to August in western Europe, from June to September in New Brunswick and Quebec and from March to August in California. There are two generations per year. The larvae feed on the leaves of ''

Sorbus aucuparia ''Sorbus aucuparia'', commonly called rowan (UK: /ˈrəʊən/, US: /ˈroʊən/) and mountain-ash, is a species of deciduous tree or shrub in the rose family. It is a highly variable species, and botanists have used different Circumscription (taxo ...

''. Other recorded food plants include alder, apple, birch, mountain ash, serviceberry and willow.

Subspecies

*''Venusia cambrica cambrica'' (Holarctic region) *''Venusia cambrica aphrodite'' Bryk, 1942 (Russia: Kuriles)

References

External links

"70.115 BF1873 Welsh Wave ''Venusia cambrica'' Curtis, 1839"
''UKMoths''. Retrieved April 24, 2019. *
"08652 ''Venusia cambrica'' Curtis, 1839 - Ebereschen-Bergspanner"
''Lepiforum e.V.'' Retrieved April 24, 2019. Moths described in 1839 Venusia (moth) Moths of Japan Moths of Europe Taxa named by John Curtis {{Asthenini-stub