Brachycaudus cardui
In 3 days ~10% in a week ~20%
Brachycaudus cardui is a species of aphid, commonly known as the thistle aphid or the plum-thistle aphid. It infests trees in the genus Prunus in the spring and autumn, and mostly plants in the aster family in the summer. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Madrid | 🇪🇸 Spain |
Rare
Under 5% of wildlife watchers report a Plum-Thistle Aphid sighting in Madrid on a given day, based on 10 verified sightings from GBIF citizen-science data. It is the 328th most-seen of the 457 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.
May
In that month about 10% of wildlife watchers report a Plum-Thistle Aphid in Madrid on a given day, against under 5% in June to April, the lowest months.
Only Madrid, in our data
Madrid is the only city on Wallace's Line with enough records to rate Plum-Thistle Aphid sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Aphididae
The closest relatives of the Plum-Thistle Aphid that you can see in Madrid (family Aphididae, Aphids) are Oleander Aphid (about 10%), Rice Root Aphid (about 10%) and Poplar Shoot Aphid (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Plum-Thistle Aphid is recorded against all the insects logged in Madrid (10 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.
