Green-Veined White

Fascinating facts about the Green-Veined White

• From sea level up to the roof of the Alps, green-veined whites span a massive altitude range, they thrive at 2,500 m in central Europe, 2,600 m in Italy and even 3,600 m in Morocco. Their preferred homes are damp, grassy places with some shade, forest edges, hedgerows, meadows and wooded river valleys.
• In the cool north, green-veined whites squeeze out two or three generations between April and early September, while a warm spell can push a fourth brood into the season. Further south, three or more partially overlapping generations flutter from March to October, stretching the life-cycle across most of the growing year.
• When a male green-veined white mates, he donates a nuptial gift that weighs about 15 % of his own body mass, a cocktail of sperm and nutrient-rich accessory substances. This hefty package fuels the female's egg production and lengthens her lifespan, turning each mating into a substantial investment rather than a simple sperm drop. In P. napi, the nuptial gift is an example of sexual cooperation towards a common interest of both males and females. Such male generosity explains why polyandrous females enjoy higher lifetime fecundity.
• After copulation, a male floods the female's sperm storage organ with infertile sperm, which makes up 90 % of the total sperm count, effectively blocking her from remating for a time. This sperm "plug" creates a refractory period that protects the first male's paternity but also delays the female's chance to gather more nutrients from additional mates. The strategy is reinforced by the anti-aphrodisiac methyl salicylate, which males inject along with sperm to further discourage rivals. The trade-off highlights a classic tug-of-war: males guard their investment, while females balance the cost of missed nutrition against the benefit of extra matings.
• Male green-veined whites broadcast a lemon-y perfume that humans can smell, it's citral, the same flavor component of lemon peel oil. This scent comes from specialized androconial scales on the wings and doubles as a sex pheromone.

Sources

Every fact above was checked against these pages, and kept only where one of them states it.

• Wikipedia

At a glance

About the Green-Veined White

As the warm sunlight dances across the meadow, a delicate Green-Veined White butterfly flutters into view, its ethereal wings beating in a hypnotic rhythm as it alights upon a tender bloom. With an air of gentle nonchalance, it sips nectar from the flower's center, its proboscis uncoiling like a slender thread as it savors the sweetness of the moment. In this fleeting instant, the Green-Veined White embodies the very essence of carefree existence, its fragile beauty a poignant reminder of the transient wonders that inhabit our natural world.

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