Theclinesthes serpentata
In 3 days ~10% in a week ~20%
Theclinesthes serpentata, commonly known as the saltbush blue or chequered blue, is a species of butterfly in the family Lycaenidae that is native to Australia. The species was first described in 1869 by German entomologist and physician G. A. W. Herrich-Schäffer. It is common throughout all Australian states and territories, and can be found in a wide range of habitats.
This is a very small butterfly, with a wingspan of 18 mm (0.71 in) for both male and female specimens. On the top side, the wings have broad margins of brown, with blue colouration towards the thorax. The underside is brown with patches of white. Male and female specimens have the same colouration, which ranges from mid to dark brown and purple-blue to blue. The larvae grow to 9mm in length, with a textured skin surface and colouration ranging from pale green to grey-green. The caterpillars blend in with their host plant, the saltbush, but have black and yellow stripes lining their back that can distinguish them.
The saltbush blue has a wide distribution, due to their preferential food plant being dispersed across biomes and states. Thus, the butterfly occupies a diverse range of habitats... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Hattah-Kulkyne National Park | 🇦🇺 Australia | |
| 2 | Rottnest Island | 🇦🇺 Australia | |
| 3 | Wilsons Promontory National Park | 🇦🇺 Australia | |
| 4 | Grampians National Park | 🇦🇺 Australia |
Rare
Under 5% of wildlife watchers report a Saltbush Blue sighting in Perth on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 254th most-seen of the 275 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.
December
In that month about 10% of wildlife watchers report a Saltbush Blue in Perth on a given day, against under 5% in January to November, the lowest months. That is one of Perth's driest months, with about 10 mm of rain against 130 mm in July.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Saltbush Blue sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 2
Of the 2 cities where we can rate Saltbush Blue sightings, Perth ranks 2nd at under 5%. The best odds are in Melbourne (Australia, about 10%).
Same family: Lycaenidae
The closest relatives of the Saltbush Blue that you can see in Perth (family Lycaenidae, Gossamer-winged Butterflies) are Zizina labradus (about 10%) and Double-Spotted Line Blue (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Saltbush Blue is recorded against all the insects logged in Perth (5 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.
