Diprion similis
In 3 days ~10% in a week ~20%
Diprion similis is a species of sawfly in the family Diprionidae. It is native to central and northern Europe and Asia but was accidentally introduced into North America where it has become invasive. The larvae feed on the needles of pine trees, especially those of the white pine (Pinus strobus). In North America it is known as the introduced pine sawfly or the imported pine sawfly. It is also known as the white pine sawfly because of its preference for feeding on the white pine, but this name is confusing because another sawfly, Neodiprion pinetum, whose larvae also feed on this tree, is itself known as the "white pine sawfly".
The adult male is between 7 and 9 mm (0.28 and 0.35 in) in length, black apart from the underside of the abdomen which is sometimes reddish-brown. Antennae are black and bipectinate (feather-like), and legs are yellow except for the trochanters and the base of the femora which are brownish-black. The female is between 7.5 and 10 mm (0.3 and 0.4 in) long, with a black head and thorax and usually a yellow and black abdomen, although some individuals are dark. Antennae are black and serrate (saw-like), and legs are yellow with dusky bases.
Larvae... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Acadia National Park | 🇺🇸 United States |
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report an Introduced Pine Sawfly sighting in Boston on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 888th most-seen of the 1200 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report an Introduced Pine Sawfly in Boston on a given day, so our monthly data shows no clear season.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Introduced Pine Sawfly sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 cities where we can rate Introduced Pine Sawfly sightings, Boston has the highest daily chance: under 5%. Next come Toronto (Canada, under 5%).
Same order: Hymenoptera
The closest relatives of the Introduced Pine Sawfly that you can see in Boston (order Hymenoptera, Ants, Bees, Wasps, and Sawflies) are Common Eastern Bumble Bee (about 50%), Brown-Belted Bumble Bee (about 30%) and Eastern Carpenter Bee (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Introduced Pine Sawfly is recorded against all the insects logged in Boston (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.
