Australian Fritillary  |  

Argynnis hyperbius inconstans

Status: Critically Endangered on the EPBC Act list

Argynnis hyperbius inconstans, the Australian fritillary, belongs to the family Nymphalidae. Males and females of this subspecies differ in appearance. The male Australian fritillary has a wingspan of 60 mm. The upperside of the wings are light orange-brown in colour, with numerous rounded black markings and a double black subterminal line (line near the edges of the wings). The underside of the forewings are marked the same as the upperside, however they are pinkish-orange in colour, and the apex of the wings (the anterior corners) are light orange. The underside of the hindwings are light orange with black markings edged with silver. Females have a wingspan of 66 mm. The colour and markings of the female are similar to the male, however the background wing colour is a slightly paler orange, some black markings are more pronounced, and the apex of the wings are sometimes tinged green. The subspecies’ eggs are dome-shaped, pale yellow in colour and 0.9 mm x 0.7 mm in size. The first instar has a brown body with a lateral white stripe and pairs of white dorsal spots. The second instar has a brownish black body with a short thick scoli (an external spine). The third and fourth instar stages have a black head with two blunt horns, a black body Argynnis hyperbius inconstans (Australian fritillary) Conservation Advice Page 2 of 12 with a broad orange dorsal stripe. The pupa are approximately 26 mm long and are orangebrown in colour with dark brown markings that fade with age.

Government evidence of impact of climate change:

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  • Australian Government, Conservation Advice, Argynnis hyperbius inconstans

    As the arrowhead violet varies in abundance following periods of drought; flood and fire this may impact on breeding in the Australian fritillary given that moderate densities of the arrowhead violet are necessary to sustain breeding (Sands New 2002 QLD DEHP 2010).
    Fire Changed fire Suspected Current As the larval food plant; the arrowhead violet; regimes too resprouts rapidly after fire and can set seed frequent rapidly; it can be considered to be a fire tolerant burning or lack species (Andren pers. comm.; 2016).
    However; of burning its decline in abundance in coastal areas may be partially the result of altered fire regimes.
    Both an increase in fire frequency and a lack of fire can adversely affect the species (Sands New 2002 QLD DEHP 2010 Andren pers. comm.; 2016).
    As the arrowhead violet varies in abundance following periods of drought; flood and fire this may impact on breeding in the Australian fritillary given that moderate densities of the arrowhead violet are necessary to sustain breeding (Sands New 2002 QLD DEHP 2010).