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Aglia tau (Linnaeus, 1758)

Самец  (Aglia tau)


class Insecta subclass Pterygota infraclass Neoptera superorder Holometabola order Lepidoptera superfamily Bombycoidea family Saturniidae subfamily Agliinae genus Aglia → species Aglia tau

Species name(s)

Aglia tau (Linnaeus, 1758) = cerretanica Rougeot, 1965 = spaniolissima Gómez Bustillo & Gómez de Aizpurua, 1980 = eumense Gómez Bustillo & Fernández Vidal, 1980 = juangabrielis Gómez Bustillo & Fernández Vidal, 1980.

Tau Emperor


Zoogeographical regions


Russia regions

#1. Kaliningradsky*; #3. Karelsky; #4. Evropeisky Severo-Zapadny; #7. Evropeisky yuzhno-tayozhny; #8. Evropeisky Tsentralny; #9. Evropeisky Tsentralno-Chernozyomny; #10. Sredne-Volzhsky; #11. Volgo-Donsky; #12. Nizhnevolzhsky; #13. Zapadno-Kavkazsky*; #16. Sredne-Uralsky; #17. Yuzhno-Uralsky; #19. Sredneobsky; #20. Yuzhno-Zapadnosibirsky; #22. Krasnoyarsky; #23. Predaltaisky; #24. Gorno-Altaisky; #25. Tuvinsky*; #26. Predbaikalsky; #27. Pribaikalsky; #28. Zabaikalsky; #31. Yuzhno-Yakutsky; #36. Sredne-Amursky; #37. Nizhne-Amursky; #40. Primorsky.

* An asterisk denotes a region for which the species is listed as an migrant or information that requires additional checking.

Forewing length

30—39 mm.


60—85 mm.

Primary colors

Yellow, Blue, Brown/Gray/Black.

Flight time

January February March April May June July August September October November December

Larva lifespan

January February March April May June July August September October November December

Over-wintering stage


Самец  (Aglia tau)

Detailed information with references

Habitus and Differences from alike species

  • Length of front wing - 3-3,9 cm. The background of the wings - orange-brown, and the typical pavlinoglazok oculate spots - dark blue. Complementing the beauty of the dark border around the edge of the wings. Females with one side bigger than the other - less brightly colored, but still without a dark border, but only with a dark stripe. Antennae of females long, thin, male - comb.The body is more slender males than in females, which is also strongly pubescent. [5]. Peter Khramov.
  • Wingspan: 60-85 mm. Personal communication. Vasiliy Feoktistov.


  • Austria, Belgium, Bulgaria, Hungary, Germany, Denmark, Greece, Spain, Italy, Latvia, Lithuania, Luxembourg, Netherlands, Norway, Poland, Romania, the Soviet Union - the European part, Finland, France, Czech Republic, Switzerland, Sweden, Estonia , Yugoslavia. [1]. Peter Khramov.
  • Regions of the Russian Federation: the Volga-Don, Gorno-Altaisk, the European North-West, the European Central Black Earth, the European Central European South taiga, Trans-Baikal, West Caucasian (?), Kaliningrad (?), Karelia, Krasnoyarsk, Nizhny-Amur, Lower Volga, Prealtay, of Baikal, Pribaikalskiy, Seaside, Mid-Amur, Mid-Volzhsky, Mid-Ural, Sredneobskaya, Tuva (?), South-West-Siberian, South Ural, South Yakutia . [3]. Peter Khramov.
  • Austria, Belarus, Belgium, Bulgaria, Bosnia and Herzegovina, Hungary, Germany, Greece (mainland), Denmark (mainland), Spain (mainland), Italy (mainland), Latvia, Lithuania, Luxembourg, Macedonia, Netherlands, Norway (mainland), Poland, Romania, Russia, Slovakia, Slovenia, Ukraine, Finland,France (mainland), Croatia, Czech Republic, Switzerland, Sweden, Estonia, Yugoslavia. [10]. Peter Khramov.
  • The area - almost the whole of Europe to 62 ° N. w. By and large, the butterfly is tied only to the beech forests, and therefore lives in Asia, and in the east comes to Japan. But the British Isles red pavlinoglazki not. [5]. Peter Khramov.
  • Wingspan: 60-85 mm. Personal communication. Vasiliy Feoktistov.


  • One generation. From mid-April to May. [5]. Peter Khramov.

Additional info about Imago

  • Males fly much faster than females, the latter often do not fly, and currently sit on a piece of beech wood so let pheromones into space, thus declaring their readiness to mate. And to reach them - the case of males.Flying the same day they are particularly fond of midday, the sun, where they can be seen flying close to the ground surface of tall beech forests. [5]. Peter Khramov.

Larva lifespan

  • The larva of A. tau lives from May until early August. [5]. Peter Khramov.

Larva food plants

  • Betula, Alnus glutinosa, A. incana, Salix caprea, Sorbus aucuparia, Tilia cordata, Quercus, Corylus avellana. [28]. Peter Khramov.
  • Beech, especially young leaves. Also - birch, oak, blackthorn and apple. [5]. Peter Khramov.

Additional info about Larva

  • Caterpillar coexists with twin horns on his back, which, however, after the third molt still disappear. The adult caterpillar is green with a yellow stripe and lateral yellow ring around his neck. Red stigmata. Young caterpillars live in groups, and later crawl one.For pupation lightweight woven mesh cocoon and caterpillar climbs a fallen beech leaves. [5]. Peter Khramov.

Overwintering stage

  • Winters doll. [5]. Peter Khramov.

Subspecies Aglia tau


Initial species uploading to the site: Peter Khramov.

Photos: Irina Nikulina.

Text data: Peter Khramov, Vasiliy Feoktistov.

Main characteristics formalization: Peter Khramov, Sergei Kotov, Vasiliy Feoktistov.

Color characteristics formalization: Peter Khramov.



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26.05.2015 23:53, Vasiliy Feoktistov Corrected data.

Wingspan: No formalized data → 60—85 mm.

30.01.2014 20:44, Sergei Kotov Corrected data.

Over-wintering stage: No formalized data → Pupa.

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