Allograpta obliqua
In 3 days ~10% in a week ~30%
Allograpta obliqua is a common North American species of hoverfly, commonly known as oblique streaktail. The larvae are important predators of aphids while adults are pollinators. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Shenandoah National Park | 🇺🇸 United States | |
| 2 | Channel Islands National Park | 🇺🇸 United States | |
| 3 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 4 | Point Pelee National Park | 🇨🇦 Canada | |
| 5 | Acadia National Park | 🇺🇸 United States | |
| 6 | Big Bend National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sacramento | 🇺🇸 United States | |
| 2 | San Diego | 🇺🇸 United States | |
| 3 | Los Angeles | 🇺🇸 United States | |
| 4 | San Francisco | 🇺🇸 United States | |
| 5 | Boston | 🇺🇸 United States | |
| 6 | Austin | 🇺🇸 United States | |
| 7 | Dallas | 🇺🇸 United States | |
| 8 | Houston | 🇺🇸 United States | |
| 9 | San Antonio | 🇺🇸 United States | |
| 10 | New York City | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report an Oblique Streaktail sighting in Denver on a given day, based on 22 verified sightings from GBIF citizen-science data. It is the 179th most-seen of the 461 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.
June and July
In those months about 10% of wildlife watchers report an Oblique Streaktail in Denver on a given day, against under 5% in August to May, the lowest months. Those are among Denver's wettest months, with about 50 mm of rain a month against 15 mm in January.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Oblique Streaktail sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
20th of 25
Of the 25 cities where we can rate Oblique Streaktail sightings, Denver ranks 20th at under 5%. The best odds are in Sacramento (United States, about 20%), San Diego (United States, about 10%) and Los Angeles (United States, about 10%).
Same family: Syrphidae
The closest relatives of the Oblique Streaktail that you can see in Denver (family Syrphidae, Hover Flies) are Eurasian Drone Fly (about 10%), Margined Calligrapher (about 10%) and Large-Tailed Aphideater (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Oblique Streaktail is recorded against all the insects logged in Denver (22 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.
