Trioza adventicia
In 3 days ~10% in a week ~20%
Trioza adventicia, commonly known as the syzygium leaf psyllid, lillypilly psyllid, or eugenia psyllid, is a sap-sucking hemipteran bug in the family Triozidae which creates galls on the leaves of Syzygium paniculatum. This species is native to eastern Australia and has been introduced into California, southern Australia, and New Zealand.
The nymphs form pit galls in the leaves and stunt the plant's growth. Trioza adventicia was for decades identified as Trioza eugeniae Froggatt 1901 in the ornamental plant industry, in the field of biological pest control in the United States, and in its native eastern Australia, resulting in a large body of academic literature—and an even larger number of horticultural resources—using the latter name for the present species. Using multiple lines of morphological evidence and DNA barcoding, a 2019 study confirmed that T. adventicia and T. eugeniae are distinct species, and determined that the widespread introduced species on Syzygium paniculatum that had long been known as T. eugeniae is in fact T. adventicia. The true T. eugeniae is only known to occur in a small region of southeastern Australia. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Auckland | 🇳🇿 New Zealand | |
| 2 | Sydney | 🇦🇺 Australia | |
| 3 | San Francisco | 🇺🇸 United States | |
| 4 | San Diego | 🇺🇸 United States | |
| 5 | Brisbane | 🇦🇺 Australia | |
| 6 | Los Angeles | 🇺🇸 United States | |
| 7 | Melbourne | 🇦🇺 Australia |
Rare
Under 5% of wildlife watchers report a Syzygium Leaf Psyllid sighting in Brisbane on a given day, based on 16 verified sightings from GBIF citizen-science data. It is the 721st most-seen of the 1083 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.
September
In that month about 10% of wildlife watchers report a Syzygium Leaf Psyllid in Brisbane on a given day, against under 5% in October to August, the lowest months. That is one of Brisbane's driest months, with about 40 mm of rain against 160 mm in February.
5th of 7
Of the 7 cities where we can rate Syzygium Leaf Psyllid sightings, Brisbane ranks 5th at under 5%. The best odds are in Auckland (New Zealand, about 10%), Sydney (Australia, under 5%) and San Francisco (United States, under 5%).
Same order: Hemiptera
The closest relatives of the Syzygium Leaf Psyllid that you can see in Brisbane (order Hemiptera, True Bugs, Hoppers, Aphids, and allies) are Hibiscus Harlequin Bug (about 30%), Common Assassin Bug (about 20%) and Lychee Stink Bug (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Syzygium Leaf Psyllid is recorded against all the insects logged in Brisbane (16 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.
