A rare species in
Belgium, almost exclusively known from the southern provinces. Where
both Theria species occur together, this T. rupricapraria
is the most abundant.
larva lives on Crataegus or Prunus spinosa.
adults fly from January onwards till March and because of the early
flight period they might be overlooked in some areas. The flight
period is slightly later than that of T. primaria. They come
ID: Male; the central band contrasts much more with the ground colour
than in T. primaria
and it is more narrow towards the dorsum; both pre- and postdiscal
lines well indicated. Female; the forewings about 1/2 the length
of the abdomen; the central band smaller and darker than in T. primaria (when fresh the colour is black) and sharply defined, and it narrows towards the dorsum side.
Namur, Lavaux Ste.-Anne, 15 February 2004.
male (Photo © Chris Steeman)