Chelostoma campanularum
In 3 days ~10% in a week ~20%
Chelostoma campanularum, or the harebell carpenter bee, is a species of hymenopteran in the family Megachilidae. It is found in Europe and Northern Asia (excluding China) and North America. The bee is small and black (6-7mm) with a single flight period from mid-June to mid-August. The male has a two-pronged peg on the final segment of the abdomen and the female has snow white pollen collecting hairs on the underside. It is most easily seen on Bellflowers (Campanula species) and Sheep's bit.
To collect the pollen the female brushes the hairs on the underside of her abdomen on to the pollen using her back legs and using her front legs and mandibles to grip on to the anthers of the flower. The males can often be found in the same flower. Mating takes place in the flowers.
In order to encourage the bee, naturalists plant a variety of Bellflower species and provide dry reed stems that the bees use as nesting sites. Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Small Scissor Bee sighting in London on a given day, based on 15 verified sightings from GBIF citizen-science data. It is the 873rd most-seen of the 1504 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 Small Scissor Bee in London on a given day, against under 5% in July to May, the lowest months.
Yes
Of the 2 cities where we can rate Small Scissor Bee sightings, London has the highest daily chance: under 5%. Next come Toronto (Canada, under 5%).
GBIF citizen-science records
It is estimated from how often the Small Scissor Bee is recorded against all the insects logged in London (15 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.
