Last modified: Dec. 7, 2024, 12:29 p.m.
The first observation of this very rare and local species in Belgium was in 1961 (LG). From 2021 onwards, several observations became known.
Native
For your information, to the best of our knowledge, the first 10 observations after 2004 (if any) are listed here:
1 ex. on 12.ix.2021 at Werken (WV), leg. J. Quartier.
1 ex. on 28.ix.2023 at Borchtlombeek (VB), leg. T. Boumon.
1 ex. on 25.x.2023 at Herne (VB), leg. F. Bossuyt.
1 ex. on 25.x.2024 at Kerniel (LI), leg. J. Reekmans.
1 ex. on 27.x.2024 at Maisières (HA), leg. S van Bekkum.
Wingspan 17–22 mm. The moths are gray or brown in color, with ocher dusting, with two large jagged white lines across each wing. The wing edge is outlined in brown and towards the outside there is a hatch of the same color that extends to the fringes of the wing. The palps are brown, the head has a tuft of ocher hair on the upper part, the thorax is brown mottled with white, while the abdomen is brown with thin white lines.
The larvae live in a silken web at the water surface.
The moths can be seen from June till October.
The monophagous larva feeds on Salvinaceae like Azolla filiculoides and possibly other aquatic plants.