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Brimstone Butterfly
Appearance: Bright yellow males and pale greenish-white females.
Upper Wings: Males are bright yellow; females are greenish-white.
Under Wings: Both sexes have a more muted, greenish color.
Differences between Males and Females: Males are a brighter yellow than females.
When to See: March to May and July to September.
What They Eat: Adults feed on nectar from primroses, bluebells, and thistles. Caterpillars eat buckthorn leaves.
Migrant: Not a migrant.
Common in Selby Area: Yes, particularly in gardens and woodlands.
How to Help: Plant buckthorn and nectar-rich flowers.
Good Places to See: Woodland clearings and garden flowers.
Interesting Fact: Brimstones are known for their long lifespan, living up to 13 months.
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