Aphis craccivora
In 3 days ~10% in a week ~20%
Aphis craccivora, variously known as the cowpea aphid, groundnut aphid or black legume aphid, is a true bug in the family Aphididae. Originally of probable Palearctic origin, it is now an invasive species of cosmopolitan distribution.
Aphis craccivora is a small species of aphid. The female has a glossy black or dark brown body with a prominent cauda (tail-like protrusion), and legs in some shade of brown or yellow. The antennae have six segments and these and the limb segments, cauda and cornicles are pale proximally (close to the body) and dark distally (further from the body). The adults do not have wax on their dorsal surface but the nymphs are lightly dusted with wax. Winged females are up to 2.2 mm (0.1 in) long and have cross-barring on the abdomen. Wingless females are a little smaller.
Aphis craccivora is believed to be Palearctic in origin but has expanded its range so that now it is near cosmopolitan. In recent years its range has extended further north in Siberia and Canada and further south in Chile and Argentina. It is abundant in the Mediterranean area and subtropics and in the tropics it is one of the most common aphid species. Infests... 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 Cowpea Aphid sighting in Madrid on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 350th 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.
June
In that month about 10% of wildlife watchers report a Cowpea Aphid in Madrid on a given day, against under 5% in July to May, the lowest months. That is one of Madrid's driest months, with about 20 mm of rain against 65 mm in October.
Only Madrid, in our data
Madrid is the only city on Wallace's Line with enough records to rate Cowpea Aphid sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Cowpea Aphid is recorded against all the insects logged in Madrid (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.
