|[Note Guidelines] Photographer's Note [Dutch]|
|Furcula bicuspis(Borkhausen, 1790) male / Alder Kitten male / Berkenhermelijnvlinder mannetje / Birkengabelschwanz mńnnchen / Harpye Bicuspide mÔle.|
Description: Wingspan 40-48mm.
Adults have white forewings with a broad, darkish-brown central band and dark patches near the apex of the forewing. There is also a series of black dots above the band and along the outer edge of the forewing. The thorax is dark grey-brown and quite hairy. The abdomen is white with grey bands between segments. The hindwings are white with brown veining.
Similar Species: Sallow and Poplar Kittens; check size and banding
Key Identification Features:
Darker banding than other two kittens
Dark patch at the apex of forewings
White head and tip to the abdomen
Of the three 'kittens' (Furcula spp.) in Britain, this has the most contrasting appearance, having dark slate-grey, almost black bands on a white background.
The single generation flies from May to July, and can be found in woodland habitats.
Skinner states that both sexes come frequently to light in small numbers.
The larvae are similar in appearance to the other kittens and should be examined carefully to confirm identification. Skinner gives July to September as the most productive period for finding larvae. The recorded foodplants are birch Betula spp. and Alder Alnus glutinosa. It overwinters inside a tough cocoon attached to the trunk or branch of the foodplant.
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