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Clouded Yellow

Colias croceus (Geoffroy, 1785)

Status

Corfu Status: Present EU Red Data Status 2010: Least Concern

Description

A medium sized yellow butterfly with a prominent black margin on the upperside, which can be seen on the underside. There is also a very pale yellow form. The butterfly always rests with its wings closed. Males and females are similar, with the female has yellow spots in the black margin. There is a single black discal spot on the forewing, and an orange discal spot on the hindwing. The pale coloured helice form, could be confused with butterflies in the genius Pieris whilst in flight.

Habitat Requirements

Given that this butterfly is a strong migrant it comes as no suprise to see it just about anywhere on the island. However, it is frequently seen more on the coast and less likely in urban environments.

Larval Foodplants

Milk-vetch Astragalus boeticus (pale sulphur yellow/white flowers), Wild Liquorice Astragalus glycyphyllos Milk-vetch Astragalus hamosus (pale yellow flowers), Montpellier Milk-vetch Astragalus monspessulanus (mauve flowers), Milk-vetch Astragalus pelecinus (lilac/white flowers), Milk-vetch Astragalus sempervirens (pink/white flowers), Astragalus suberosus, Rush-like Scorpion Vetch Coronilla juncea, Annual Scorpion Vetch Coronilla scorpioides, Scorpion Senna Coronilla valentina subsp. glauca, Hippocrepis biflora, Hippocrepis ciliata, Hippocrepis emerus subsp. emeroides, Slender Bird's-foot-trefoil Lotus angustissimus, Lotus conimbricensis (white flowers), Lotus cytisoides, Edible Lotus Lotus edulis, Lotus halophilus, Lotus longisiliquosus, Lotus ornithopodioides, Lotus palustris, Greater Bird's-foot-trefoil Lotus pedunculatus, Lotus peregrinus, Lotus preslii, Narrow-leaved Bird's-foot-trefoil Lotus tenuis, Black Medick Medicago lupulina, Hairy Medick Medicago polymorpha, Lucerne Medicago sativa, Furrowed Melilot Melilotus sulcatus, Red Clover Trifolium pratense, Vicia cordata, Tufted Vetch Vicia cracca, Spring Vetch Vicia lathyroides (2-tone purple flowers), Yellow Vetch Vicia lutea, Vicia parviflora, Vicia peregrina, Vicia pubescens, Common Vetch Vicia sativa subsp. sativa, Vicia tenuifolia, Vicia villosa.

Observations

Whilst this species is probably breeding throughout the year on Corfu, population numbers must be massively affected by migration events. It regularily nectars on Knapweed Centaurea spp., Dandelion Taraxacum spp., Fleabane Erigeron spp., Marjoram Origanum vulgare and Ragwort Senecio jacobaea.

*The information provided in the tables below is based on verified sightings of the Clouded Yellow submitted via this website since 1st January 2021.

First and Last Sightings

Year First Last/latest # Days
2022 02/01/2022 17/05/2022 135 days
2021 06/02/2021 31/12/2021 328 days

Number of Observations

Year Number of observations
2022 977
2021 556
Grand Total 1533

Distribution Map

Distribution map for the Clouded Yellow based on the data submitted online via this website will be available below soon.

Flight Times for the Clouded Yellow (2022)

The chart below shows Clouded Yellow flight data by month for 2022 submitted online since 1st January 2022 to 17th May 2022.

Flight Times for the Clouded Yellow (All Data)

The chart below shows Clouded Yellow flight data by month based on all data submitted online since 1st January 2019 to 17th May 2022.

Taxonomy

  • Vernacular/Common Name: Clouded Yellow
  • Family: Pieridae (Swainson, 1820)
  • Sub-family: Coliadinae (Swainson, 1827)
  • Tribe: Coliadini (Swainson, 1827)
  • Genus: Colias (Fabricius, 1807)
  • Species: croceus (Geoffroy, 1785)

References

For a list of references, please see our bibliography page.