The Goldwing moth (Synthymia fixa) is a small, specialized moth known for its striking, hidden coloration and limited habitat range in southern Europe and North Africa. It belongs to the Erebidae family, specifically within the subfamily often referred to as underwing moths.
Here are key facts about the Goldwing moth (Synthymia fixa):
Physical Characteristics
Appearance: They are small, with a wingspan of only 37–40 mm. The forewings are typically brown, providing excellent camouflage when at rest.
Hidden Colors: When disturbed, they reveal bright orange or golden hindwings. This sudden flash of color is a defense mechanism intended to surprise predators.
Appearance in Flight: They are often described as small brown moths that appear bright orange when flying in the countryside.
Flight Time: They are primarily seen in late spring, particularly April and May.
Day-Flying: While many moths are nocturnal, Goldwings can be seen flying during the day, particularly when disturbed from their resting spots.
Habitat: They prefer warm regions and are found in the Maltese islands, parts of southern Europe, and North Africa.
Host Plant: The caterpillars feed exclusively on Bitumen Vetch (Bituminaria bituminosa), which is also known as Pitch Clover or Silla tal-mogħoż in Malta.
Habitat Association: Due to their specialized diet, the moths are found in close proximity to patches of Bitumen Vetch.
Distribution: While common in certain Mediterranean areas, they are not a resident British species, with only a single, historic report of one being caught in Devon in 1937.
Visibility: In good years, they can be seen in large numbers fluttering through patches of their host plant in the Maltese countryside.
