Common Grass Yellow (Eurema hecabe) lives in open grass and scrub across Asia and Africa. It feeds on cassia leaves only. Its conservation status is Least Concern.
Fascinating facts about the Common Grass Yellow
- When daylight exceeds thirteen hours the common grass yellow develops a darker summer form, a change that is directly linked to the length of the day. In contrast, when the diurnal period falls to twelve hours or fewer the butterfly assumes a lighter, post-monsoon appearance.
- The dorsal wing surface of the common grass yellow reflects strongly in the ultraviolet range due to multilayer cuticular nanostructures covering the yellow scales.
- Female common grass yellows can discriminate colours when searching for suitable host plants for oviposition, such as leguminous, euphorbiaceous and cucurbit species including Abrus precatorius and Acacia.
- The common grass yellow is regularly infected by several strains of Wolbachia bacteria, a parasite that lives inside the butterfly's tissues. These microbes have the ability to change the proportion of males to females that emerge from the pupal stage, effectively skewing the natural sex balance of the population. When the ratio is altered, the overall makeup of local groups can shift, influencing how many breeding individuals of each sex are present at any time.
- During metamorphosis the chrysalis of the common grass yellow hangs from a branch, held aloft by its tail and a moderately long silk band. Its abdomen is rounded while the thorax is strongly compressed, causing the wing-cases to join and create a deep, sharp keel along the back. The head-case ends in a short pointed snout, and although the pupa is usually solitary and green, it can sometimes be found in groups on a dead twig.
Sources
Every fact above was checked against these pages, and kept only where one of them states it.
At a glance
RangeAsia and Africa
HabitatOpen grass and scrub
DietCassia leaves only
About the Common Grass Yellow
As the sun rises over the lush meadows, the Common Grass Yellow butterfly stirs to life, its delicate wings beating in a hypnotic rhythm as it dances through the tall grasses, leaving a trail of golden light in its wake. With each flutter, its bright yellow wings flash like tiny lanterns, illuminating the intricate web of life that binds this creature to its surroundings, a masterful blend of form and function that has allowed it to thrive in a wide range of habitats. As it flits from flower to flower, sipping nectar and spreading pollen, the Common Grass Yellow embodies the very essence of carefree joy, its unbridled spirit a testament to the enduring beauty of the natural world.
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