© Robin Howard
Furcula bicuspis (Borkhausen, 1790)
La Harpye bicuspide
A bivoltine species on the wing from April to August. A frequent visitor to light from traps placed in woodland where birch and alder are present. Most commonly taken from the stands of pure birch woodland at Las Descargues.
The larva feeds on alder and birch, overwinters as pupa in a cocoon affixed to a branch or twig of the foodplant.