title: Sideridis turbida
text: # Sideridis turbida
  
  Sideridis turbida, the white colon, is a moth of the family Noctuidae, subfamily Hadeninae. It is found throughout continental Europe, the British Isles and southern Scandinavia.
  
  ## Technical description and variation
  
  The wingspan is 36–44 mm. Forewing drab grey, suffused brown, except along costa and inner margin, and in an oblique pale fascia-form submarginal area;the pale submarginal fascia externally throw's off pale teeth; a long black streak from base below cell: median vein white, with only a small white spot at end of cell and a minute black point above it: veins whitish with black terminal streaks in the intervals:hindwing dark greyish, fuscous. - ab. suffusa Tutt is a melanic brown form common in Britain, occurring, but rarely, in the Alps; — ochracea Tutt is a brownish ochreous form, also rare, apparently, on the continent.
  
  ## Biology
  
  The moth flies from May to July, with a second brood in August–September in southern parts of its range.
  
  Larva reddish brown, with scattered black clots: dorsal and subdorsal lines black and fine; venter paler;thoracic plate black with 3 white lines; head brown. The larvae feed on various plants growing in sandy places, including dandelion and plantain.
  
  The English vernacular name refers to the only distinctive marking on the moth, a pair of white dots outward of the center of the forewing resembling a colon or joined into a > shape.
  
  