Uroleucon sonchi
In 3 days ~10% in a week ~20%
Uroleucon sonchi is a species of aphid in the family Aphididae. Known as the large sow-thistle aphid, it is a native of Europe, and has been introduced to several other countries. It principally feeds on the sow thistle (Sonchus sp.) but is also a pest of cultivated lettuce, and so is also known as the brown lettuce aphid. 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 a Sow-Thistle Aphid sighting in Melbourne on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 703rd most-seen of the 875 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Sow-Thistle Aphid in Melbourne on a given day, so our monthly data shows no clear season.
Among the best
Of the 3 cities where we can rate Sow-Thistle Aphid sightings, Melbourne ranks 3rd at under 5%, level with the leaders once rounded. The best odds are in Madrid (Spain, under 5%) and Sydney (Australia, under 5%).
GBIF citizen-science records
It is estimated from how often the Sow-Thistle Aphid is recorded against all the insects logged in Melbourne (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.
