Neodiprion sertifer
In 3 days ~10% in a week ~20%
Neodiprion sertifer, the European pine sawfly, is a sawfly species in the genus Neodiprion. Native to Europe, it was accidentally introduced to North America in 1925, where it has established itself as a commercial pest.
The larvae of Exhyalanthrax afer feed on N. sertifer cocoons. The European pine sawfly typically hatches from early April to late May. The larvae feed on existing pine needles. When they mature, they spin into cocoons. In the fall, they leave their cocoons as wasp-like creatures and mate. September and October are when the female lays eggs in pine trees for the next generation. Their favorite trees are Scots pine, red pine, Jack pine, and Japanese pines.
The European pine sawfly is a pest as it eats a lot of needles. While this can stunt the growth of the tree, it rarely is enough to kill the tree. For controlling it, one can use natural parasites, remove the eggs from the tree, or spray pesticides. Any standard pesticide sprayed on them during their larval stage will kill them. Spraying is usually done very early, often as soon as they are seen.
The caterpillars contain chemical compounds including (+)-Catechin... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Minneapolis [Saint Paul] | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a European Pine Sawfly sighting in Minneapolis [Saint Paul] on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 603rd most-seen of the 672 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 a European Pine Sawfly in Minneapolis [Saint Paul] on a given day, so our monthly data shows no clear season.
Only Minneapolis [Saint Paul], in our data
Minneapolis [Saint Paul] is the only city on Wallace's Line with enough records to rate European Pine Sawfly sightings: under 5% of wildlife watchers there report one on a given day.
Same order: Hymenoptera
The closest relatives of the European Pine Sawfly that you can see in Minneapolis [Saint Paul] (order Hymenoptera, Ants, Bees, Wasps, and Sawflies) are Common Eastern Bumble Bee (about 60%), Brown-Belted Bumble Bee (about 40%) and Black-And-Gold Bumble Bee (about 40%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the European Pine Sawfly is recorded against all the insects logged in Minneapolis [Saint Paul] (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.
