Acyrthosiphon pisum
In 3 days ~10% in a week ~20%
Acyrthosiphon pisum, commonly known as the pea aphid (and colloquially known as the green dolphin, pea louse, and clover louse), is a sap-sucking insect in the family Aphididae. It feeds on several species of legumes (plant family Fabaceae) worldwide, including forage crops, such as pea, clover, alfalfa, and broad bean, and ranks among the aphid species of major agronomical importance. The pea aphid is a model organism for biological study whose genome has been sequenced and annotated.
In the autumn, female pea aphids lay fertilized eggs overwinter that hatch the following spring. The nymphs that hatch from these eggs are all females, which undergo four moults before reaching sexual maturity. They will then begin to reproduce by viviparous parthenogenesis, like most aphids. Each adult female gives birth to four to 12 female nymphs per day, around a hundred in her lifetime. These develop into mature females in about seven to ten days. The life span of an adult is about 30 days.
Population densities are at their highest in early summer, then decrease through predation and parasitism. In autumn, the lengthening of the night triggers the production of a... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Berlin | 🇩🇪 Germany |
Rare
Under 5% of wildlife watchers report a Pea Aphid sighting in Berlin on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 869th most-seen of the 1065 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 Pea Aphid in Berlin on a given day, against under 5% in June to April, the lowest months.
Only Berlin, in our data
Berlin is the only city on Wallace's Line with enough records to rate Pea Aphid sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Aphididae
The closest relatives of the Pea Aphid that you can see in Berlin (family Aphididae, Aphids) are Lime Leaf Aphid (about 10%) and Poplar Spiral Gall Aphid (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Pea Aphid is recorded against all the insects logged in Berlin (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.
