Pearly Heath

Fascinating facts about the Pearly Heath

• The pearly heath's hindwing underside is marked by a broad white band that interrupts the row of ocelli below the apical eye, making that eye appear to sit inside the band. The butterfly occurs throughout Europe except Great Britain, from Scandinavia down to the Mediterranean and east to the Black Sea.
• The caterpillar of the pearly heath is a vivid green larva marked by a dark dorsal stripe bordered with a yellowish tint, a lighter subdorsal stripe and a pale yellow lateral stripe, while its head shines blue-green and both mouth and anal fork are red. It feeds on a range of grasses such as Holcus lanatus and Festuca ovina, living on the stalks of these forage plants.
• In pearly heath populations males greatly outnumber females, and the females tend to emerge later in the season. This imbalance means that most of the early summer flights are dominated by males, with females joining the swarms only after they have appeared. The species flies in a single generation from May to August, usually resting with its wings closed in sunny spots.
• In warm years the pearly heath can be found at altitudes up to 1,800 m, a limit that is set by temperature. At these heights the butterfly favours sun-drenched, lightly wooded forests as well as the edges of those woods where the canopy opens. It also frequents bushy, dry grasslands that provide the warm microclimate it needs for feeding and mating.
• During June and July the pearly heath is very common, often forming large swarms that are seen both at the edges of woods full of undergrowth and in open country on hills. The butterflies typically flutter round bushes, perch on the tips of low twigs, and on occasion rise into higher tree branches, showing a flexible flight pattern while they feed and mate.

Sources

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

• Wikipedia

At a glance

About the Pearly Heath

In the warm, sun-dappled clearings of woodland edges, the Pearly Heath butterfly dances with delicate abandon, its translucent wings beating in a hypnotic rhythm as it flits from bloom to bloom. With a subtle beauty that belies its unassuming nature, this gentle creature weaves a trail of quiet wonder through the underbrush, its soft brown eyes drinking in the vibrant hues of the wildflowers that sustain it. As it alights upon a tender petal, the Pearly Heath's wings fold demurely, revealing the subtle sheen that gives this enchanting butterfly its name.

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