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 Sydney on a given day, based on 32 verified sightings from GBIF citizen-science data. It is the 249th most-seen of the 742 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.
June to September
In those months about 10% of wildlife watchers report a Syzygium Leaf Psyllid in Sydney on a given day, against under 5% in October to May, the lowest months.
2nd of 7
Of the 7 cities where we can rate Syzygium Leaf Psyllid sightings, Sydney ranks 2nd at under 5%. The best odds are in Auckland (New Zealand, about 10%).
Same order: Hemiptera
The closest relatives of the Syzygium Leaf Psyllid that you can see in Sydney (order Hemiptera, True Bugs, Hoppers, Aphids, and allies) are Common Assassin Bug (about 30%), Black Prince (about 20%) and Hibiscus Harlequin Bug (about 20%), 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 Sydney (32 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.
