description Lemon Migrant Overview
The Lemon Migrant, Catopsilia pomona, is a butterfly in the family Pieridae. It occurs widely across Asia and Australasia and is known for migratory movements across parts of that range. Individuals can show seasonal variation in wing coloration, making the species variable in appearance as well as geographically widespread. It is intended here as a taxonomic entry for a migratory yellow butterfly.
help Lemon Migrant FAQ
What is the scientific name of the Lemon Migrant?
The Lemon Migrant is Catopsilia pomona, a pierid butterfly found across Asia and Australasia. It is also called the Common Emigrant or Lemon Emigrant in some regional field guides.
Why can Lemon Migrants look pale or dark yellow?
Catopsilia pomona has distinct pale and dark forms, and both can come from the same batch of eggs. Dark forms are usually more yellow and often show broader black wing margins, while pale forms can have pinkish antennae. [South Australian Butterflies species account](https://www.sabutterflies.org.au/pier/pomona.html)
Which plants do Lemon Migrant caterpillars eat?
The larvae use plants in the cassia and senna group, including Senna alata and Cassia fistula. In Australia, several native Senna and Cassia species serve as important food plants.
Why is Catopsilia pomona called a migrant?
It can move from tropical regions into subtropical areas during warmer periods, sometimes appearing far beyond its usual breeding range. Its early stages are sensitive to frost and prolonged cold, which helps explain the seasonal nature of these movements.
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