At least three independent records from different recorders/locations/dates.
Breeds and has its complete lifecycle throughout the year on Corfu. Population is self-sustaining.
Regular immigrant and/or emigrant from Corfu. May also breed but is usually not present all the year around.
Found outside its normal range, such as outside its known habitat. Not enough records to confirm as a Resident or a Migrant.
A species that is expanding its range, but is not self-sustaining, and is reliant on migrants to sustain its population. This is the stage before a species becomes a resident, or a species which is right on the edge of its known distribution.
Records that have not been substantiated and therefore the existence of such a species on Corfu is uncertain.
EU Red Data Status Definitions
Not Evaluated (NE)
A taxon is Not Evaluated when it has not yet been evaluated against the criteria
Data Deficient (DD)
A taxon is Data Deficient when there is inadequate information to make a direct, or indirect, assessment of its risk of extinction based on its distribution and/or population status. Data Deficient is therefore not a category of threat. Listing of taxa in this category indicates that more information is required and acknowledges the possibility that future research will show that threatened classification is appropriate.
Least Concern (LC)
A taxon is Least Concern when it has been evaluated against the criteria and does not qualify for Critically Endangered, Endangered, Vulnerable or Near Threatened. Widespread and abundant taxa are included in this category.
Near Threatened (NT)
A taxon is Near Threatened when it has been evaluated against the criteria but does not qualify for Critically Endangered, Endangered or Vulnerable now, but is close to qualifying for or is likely to qualify for a threatened category in the near future.
A taxon is Vulnerable when the best available evidence indicates that it meets any of the criteria A to E for Vulnerable (see Section V), and it is therefore considered to be facing a high risk of extinction in the wild.
A taxon is Endangered when the best available evidence indicates that it meets any of the criteria A to E for Endangered (see Section V), and it is therefore considered to be facing a very high risk of extinction in the wild.
Critically Endangered (CR)
A taxon is Critically Endangered when the best available evidence indicates that it meets any of the criteria A to E for Critically Endangered (see Section V), and it is therefore considered to be facing an extremely high risk of extinction in the wild.
Extinct in the Wild (EW)
A taxon is Extinct in the Wild when it is known only to survive in cultivation, in captivity or as a naturalized population (or populations) well outside the past range. A taxon is presumed Extinct in the Wild when exhaustive surveys in known and/or expected habitat, at appropriate times (diurnal, seasonal, annual), throughout its historic range have failed to record an individual. Surveys should be over a time frame appropriate to the taxon’s life cycle and life form.
A taxon is Extinct when there is no reasonable doubt that the last individual has died. A taxon is presumed Extinct when exhaustive surveys in known and/or expected habitat, at appropriate times (diurnal, seasonal, annual), throughout its historic range have failed to record an individual. Surveys should be over a time frame appropriate to the taxon’s life cycle and life form.
A medium-large plain pale-yellow butterfly. The males and females are similar, almost white in flight. In the centre of each wing there is a small brown spot, along with its wings shape makes it quite distinctive. However, it can be easily confused with other females of the same genius. The key diagnostic features are that the costa of the forewing (leading edge) is straight and not slightly concave as in G. rhamni. There is no pale orange streak on the forewing underside. The lower-half of the hind wing has prominent cusps, which are not obvious in other species of the genius.
Generalised wing venation diagram
A generalised diagram of butterfly wing venation, with anatomical labels - by Gillian Elsom.
Pieridae wing venation diagram
The wing venation of a male Brimstone butterfly Gonepteryx rhamni an example of a butterfly from the family Pieridae - by Gillian Elsom.
Unclear at this time but indications are that its distribution may be restricted to that of its host plant.
Crown of Thorns/Christ's Thorn Paliurus spina-christi, Rhamnus alaternus, Buckthorn Rhamnus cathartica - not on Corfu, Rhamnus lycioides ssp. graeca. However, it is possible that the obligate factor in the presence of the Powdered Brimstone is the existence of - Rhamnus lycioides (syn Rhamnus pallasii), which is itself a distinctive plant.
Dan Danahar suspected the occurance of Gonepteryx farinosa on Corfu after taking a photograph of a likely candiate in Kyprinades on 08/04/2015. He shared this information with a group of butterfly enthusiasts who visited Corfu in April 2019. During their visit Harry E Clarke was able to take another confirmatory photograph of this species. Careful examination of this species' hindwing morphology will aid identification. Once reliable observations can be acquired, distribution and flight periods should be clearer.
*The information provided in the tables below is based on verified sightings of the Powdered Brimstone submitted via this website since 1st January 2021.