Celastrina lavendularis
In 3 days ~10% in a week ~20%
Celastrina lavendularis, the plain hedge blue, is a small butterfly found in Sri Lanka, India, and across the Indomalayan realm that belongs to the lycaenids or blues family. Male. Upperside dark lavender-blue, with an extremely narrow black outer marginal border. Female paler, and of a purple lavender-blue. Forewing with the base of the costa and an outer band black. Hindwing with black anterior border and marginal row of prominent pale-bordered black spots. Cilia white, with inner black border. Underside greyish-white. Forewing with dusky-black streak at end of the cell, a discal series of oblique spots, and marginal row of small spots enclosed by a dentated line. Hindwing with three black subbasal spots, some specimens with a smaller spot at base of subcostal and another at base of lower median vein, a curved series of seven discal spots, and a marginal row of spots enclosed by a dentate line.
The butterfly was earlier known as Lycaenopsis lavendularis Moore. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Taipei | 🇹🇼 Taiwan |
Rare
Under 5% of wildlife watchers report a Plain Hedge Blue sighting in Taipei on a given day, based on 18 verified sightings from GBIF citizen-science data. It is the 396th most-seen of the 765 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
April and May
In those months about 10% of wildlife watchers report a Plain Hedge Blue in Taipei on a given day, against under 5% in June to March, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Plain Hedge Blue sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Only Taipei, in our data
Taipei is the only city on Wallace's Line with enough records to rate Plain Hedge Blue sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Lycaenidae
The closest relatives of the Plain Hedge Blue that you can see in Taipei (family Lycaenidae, Gossamer-winged Butterflies) are Pale Grass Blue (about 20%), Metallic Cerulean (about 20%) and Dark Cerulean (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Plain Hedge Blue is recorded against all the insects logged in Taipei (18 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
