Tamalia coweni
In 3 days ~10% in a week ~30%
Tamalia coweni, also known as the manzanita leaf gall aphid and the fold-gall aphid, is a species of aphid in the family Aphididae. Tamalia coweni induces galls on most species of glabrous manzanita tree. This aphid actually induces two types of galls: a midrib or margin leaf gall, and a less common inflorescence gall.
Tamalia coweni is common on the Pacific coast of North America and east to Nevada and Colorado. Tamalia inquilina, an inquiline of this species, is found in the Californias. Recently described species Tamalia glaucensis induces leaf galls on big-berry manzanita specifically. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sequoia and Kings Canyon National Parks | 🇺🇸 United States | |
| 2 | Channel Islands National Park | 🇺🇸 United States | |
| 3 | Yosemite National Park | 🇺🇸 United States | |
| 4 | Great Bear Rainforest | 🇨🇦 Canada |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | San Francisco | 🇺🇸 United States | |
| 2 | Portland | 🇺🇸 United States | |
| 3 | Los Angeles | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Manzanita Leafgall Aphid sighting in Great Bear Rainforest on a given day, based on 9 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 150th most-seen of the 235 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
August
In that month about 10% of wildlife watchers report a Manzanita Leafgall Aphid in Great Bear Rainforest on a given day, against under 5% in September to July, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Manzanita Leafgall Aphid 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 4 parks where we can rate Manzanita Leafgall Aphid sightings, Great Bear Rainforest ranks 4th at about 10%, level with the leaders once rounded. The best odds are in Sequoia and Kings Canyon National Parks (United States, about 10%), Channel Islands National Park (United States, about 10%) and Yosemite National Park (United States, about 10%).
Same order: Hemiptera
The closest relatives of the Manzanita Leafgall Aphid that you can see in Great Bear Rainforest (order Hemiptera, True Bugs, Hoppers, Aphids, and allies) are Limnoporus notabilis (about 20%), Meadow Spittlebug (about 10%) and Red-Cross Shield Bug (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Manzanita Leafgall Aphid is recorded against all the insects logged in Great Bear Rainforest (9 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.
