Therion morio
In 3 days ~10%
Therion morio is a species of parasitic ichneumon wasp in the family Ichneumonidae. It is a parasite of the webworm caterpillar in North America. T. morio adults lay their eggs inside webworm caterpillars by piercing them with their ovipositor. Like H. fulvipes, their eggs consist of an equatorial disc and a caudal stalk, making them look a bit like the cartoon oil lamp from Aladdin. It's thought that the shape is adapted to attach the egg to the inside of the caterpillar's integument. The egg partially hatches, and the next stage is termed a "feeding embryo", as this first stage larvae feeds through the inner membrane of the egg which still contains it. The second stage larva emerges from this inner membrane and continues to feed on the caterpillar. The head capsule of the second stage larva is much less chitinised than the first. The third stage larva is similar in appearance to the second stage larvae; Tothill describes it as a "dirty-looking, whitish grub." However, the third stage has spiracles. 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 Therion morio sighting in Vancouver on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 439th most-seen of the 482 insects we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Therion morio in Vancouver on a given day, so our monthly data shows no clear season.
Yes
Of the 2 cities where we can rate Therion morio sightings, Vancouver has the highest daily chance: under 5%. Next come Toronto (Canada, under 5%).
GBIF citizen-science records
It is estimated from how often the Therion morio is recorded against all the insects logged in Vancouver (5 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.
