(a species of owlet moth (Noctuid)) Some caterpillars, after they emerge from their egg, can increase their weight by 25,000 times.

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Winter form

The winter form, f. sesamus, is slightly larger, wings

  • are predominantly blue to blue-purple through the basal and discal areas on the wing upperside, 
  • have a line of post-discal orange patches on both wings. 
  • forewing apexes are black with one or two small white spots 
  • submargins show a band of the blue basal colouration sandwiched in between black 
  • the margin is the basal blue colour or black. 
  • the underside is a cryptic brown colour with a faint array of post-discal spots, which hardly differ in colouration to the basal colours.
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