Nematus ribesii
In 3 days ~30% in a week ~50%
Nematus ribesii is a species of sawfly in the family Tenthredinidae. English names include common gooseberry sawfly and imported currantworm. This insect is best known as a pest of gooseberries. The larvae feed on the foliage of the plant, often defoliating it completely.
Like all sawflies, this species is a hymenopteran, not a true fly. This insect can produce three generations per year, with larvae emerging between April and September. It differs in this respect from Nematus leucotrochus, the pale-spotted gooseberry sawfly, which has a single generation. The female sawfly lays eggs on the undersides of the leaves and the larvae work their way upwards, stripping the plant of foliage. The larva of this species of sawfly is up to 2 centimeters long and green in color with a black head and black spots along the body. The adult is yellowish with black markings, the females slightly larger than the males. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report an Imported Currantworm sighting in Anchorage on a given day, based on 16 verified sightings from GBIF citizen-science data. It is the 22nd most-seen of the 59 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
June
In that month about 20% of wildlife watchers report an Imported Currantworm in Anchorage on a given day, against under 5% in September to May, the lowest months.
Yes
Of the 4 cities where we can rate Imported Currantworm sightings, Anchorage has the highest daily chance: about 10%. Next come Portland (United States, under 5%) and Edmonton (Canada, under 5%).
Same order: Hymenoptera
The closest relatives of the Imported Currantworm that you can see in Anchorage (order Hymenoptera, Ants, Bees, Wasps, and Sawflies) are Yellow-Fronted Bumble Bee (about 20%), McKay's Western Bumble Bee (about 20%) and American Yellowjacket (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Imported Currantworm is recorded against all the insects logged in Anchorage (16 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.
