Heteroecus pacificus
In 3 days ~20% in a week ~40%
Heteroecus pacificus, the beaked spindle gall wasp, is a species of gall wasp in the family Cynipidae. It occurs in western North America. The galls appear on canyon live oak (Quercus chrysolepis) and huckleberry oak (Quercus vaccinifolia).
Heteroecus pacificus has two generations per year: one of sexually reproducing males and females, and the other consisting solely of parthenogenetic females. Parthenogenetic females measure 2.8–3.7 mm (0.11–0.15 in) in length and sexual ones 2.2–2.8 mm (0.087–0.110 in). Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Yosemite National Park | 🇺🇸 United States | |
| 2 | Sequoia and Kings Canyon National Parks | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Beaked Spindle Gall Wasp sighting in Sequoia and Kings Canyon National Parks on a given day, based on 10 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 95th most-seen of the 161 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
April and July–October
In those months about 10% of wildlife watchers report a Beaked Spindle Gall Wasp in Sequoia and Kings Canyon National Parks on a given day, against under 5% in May–June and November–March, the lowest months. Those are among Sequoia and Kings Canyon National Parks's driest months, with about 25 mm of rain a month against 190 mm in January.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Beaked Spindle Gall Wasp sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 2 parks where we can rate Beaked Spindle Gall Wasp sightings, Sequoia and Kings Canyon National Parks ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Yosemite National Park (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Beaked Spindle Gall Wasp is recorded against all the insects logged in Sequoia and Kings Canyon National Parks (10 verified sightings from 2019 to 2026), 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.
