Otiorhynchus sulcatus
In 3 days ~40% in a week ~70%
The black vine weevil (Otiorhynchus sulcatus) is an insect native to Europe but common in North America as well. It is a pest of many garden plants. The adult weevil is matte black with fused wing covers, and is unable to fly. It feeds at night on the outer edges of leaves, causing the leaves to have a notched margin. Broadleaved evergreen plants such as Camellia, Rhododendron, Euonymus and Bergenia are particularly prone to damage, although a wide range of different garden plants are susceptible to attack.
Female weevils have the ability to reproduce parthenogenetically with fertilisation of eggs required to produce males, though no males have been observed. This form of parthenogenesis is known as thelytoky. Grubs grow up to 1 cm in length, have a slightly curved, legless body and are creamy white in colour with a tan-brown head. They live below the soil surface, and feed on roots and cambium at the base of trunks. They mostly cause damage to herbaceous plants, particularly those growing in containers, where root growth is restricted. Severe infestations can result in complete root destruction and hence plant death.
Their host plant genera include... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Egmont National Park | 🇳🇿 New Zealand | |
| 2 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 3 | Great Bear Rainforest | 🇨🇦 Canada | |
| 4 | Acadia National Park | 🇺🇸 United States | |
| 5 | Wadden Sea National Park | 🇩🇪 Germany | |
| 6 | Bavarian Forest National Park | 🇩🇪 Germany |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Manchester | 🇬🇧 United Kingdom | |
| 2 | Liverpool | 🇬🇧 United Kingdom | |
| 3 | Copenhagen | 🇩🇰 Denmark | |
| 4 | Birmingham | 🇬🇧 United Kingdom | |
| 5 | Rotterdam [The Hague] | 🇳🇱 Netherlands | |
| 6 | Amsterdam | 🇳🇱 Netherlands | |
| 7 | Portland | 🇺🇸 United States | |
| 8 | Helsinki | 🇫🇮 Finland | |
| 9 | Warsaw | 🇵🇱 Poland | |
| 10 | London | 🇬🇧 United Kingdom |
Possible
About 20% of wildlife watchers report a Black Vine Weevil sighting in Manchester on a given day, based on 66 verified sightings from GBIF citizen-science data. It is the 66th most-seen of the 458 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
August
In that month about 30% of wildlife watchers report a Black Vine Weevil in Manchester on a given day, against under 5% in November to January, the lowest months.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Black Vine Weevil sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is seen both by day and at night.
Yes
Of the 44 cities where we can rate Black Vine Weevil sightings, Manchester has the highest daily chance: about 20%. Next come Liverpool (United Kingdom, about 10%) and Copenhagen (Denmark, about 10%).
Same genus: Otiorhynchus
The closest relatives of the Black Vine Weevil that you can see in Manchester (genus Otiorhynchus) are Armadillo Weevil (about 10%) and Clay-Coloured Weevil (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Black Vine Weevil is recorded against all the insects logged in Manchester (66 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.
