Psyllopsis fraxini
In 3 days ~10% in a week ~20%
Psyllopsis fraxini is a psyllid which lives within a gall on ash (Fraxinus excelsior). Eggs are laid in the autumn on dormant buds and the nymphs hatch in the spring and feed on the leaves. The host plant reacts by producing extra cells and the affected areas become swollen and rolls downwards and encloses the wax covered nymphs. Each gall may contain two or three generations and by the end of summer contain all stages of the insect. The galls are pale-coloured with violet or red markings. Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report an Ash Psyllid sighting in Auckland on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 527th most-seen of the 689 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.
March and April
In those months about 10% of wildlife watchers report an Ash Psyllid in Auckland on a given day, against under 5% in May to February, the lowest months.
3rd of 3
Of the 3 cities where we can rate Ash Psyllid sightings, Auckland ranks 3rd at under 5%. The best odds are in Liverpool (United Kingdom, about 10%) and London (United Kingdom, under 5%).
Same order: Hemiptera
The closest relatives of the Ash Psyllid that you can see in Auckland (order Hemiptera, True Bugs, Hoppers, Aphids, and allies) are Passionvine Hopper (about 30%), Glaucias amyota (about 20%) and Southern Green Stink Bug (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Ash Psyllid is recorded against all the insects logged in Auckland (7 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.
