Aeshna grandis
In 3 days ~20% in a week ~50%
The brown hawker (Aeshna grandis) is a species of large Palearctic dragonfly belonging to the family Aeshnidae, the hawkers. This species is found in Europe and temperate Asia, except the far east of Asia. The brown hawker was first formally described as Libellula grandis by Carl Linnaeus in the 10 edition of Systema Naturae published in 1758. It is now classified in the genus Aeshna in the family Aeshnidae, the hawkers, in the order Odonata, the dragonflies and damselflies. This species is the type species of the genus Aeshna.
The brown hawker is a large dragonfly with a body length of 73 mm (2.9 in). The body is brown marked with yellow stripes in the thorax and the wings are tinged brown. The males have small markings of blue and yellow and are noticeably waisted, and the females have small yellow markings. The nymphs are long and streamlined, 40–46 mm (1.6–1.8 in) in length, with banded legs, stripes on the head and thorax, a wide facial mask and a spine on each side of the sixth abdominal segment.
The brown hawker is found from southern Great Britain and Ireland east through Europe, including much of Fennoscandia into... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Pyrénées National Park | 🇫🇷 France | |
| 2 | Wadden Sea National Park | 🇩🇪 Germany |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Manchester | 🇬🇧 United Kingdom | |
| 2 | Leeds | 🇬🇧 United Kingdom | |
| 3 | Helsinki | 🇫🇮 Finland | |
| 4 | Birmingham | 🇬🇧 United Kingdom | |
| 5 | Novosibirsk | 🇷🇺 Russia | |
| 6 | Liverpool | 🇬🇧 United Kingdom | |
| 7 | Minsk | 🇧🇾 Belarus | |
| 8 | Stockholm | 🇸🇪 Sweden | |
| 9 | Copenhagen | 🇩🇰 Denmark | |
| 10 | Moscow | 🇷🇺 Russia |
With luck
About 10% of wildlife watchers report a Brown Hawker sighting in Helsinki on a given day, based on 47 verified sightings from GBIF citizen-science data. It is the 104th most-seen of the 838 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
August
In that month about 20% of wildlife watchers report a Brown Hawker in Helsinki on a given day, against under 5% in October to June, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Brown Hawker sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 13 cities where we can rate Brown Hawker sightings, Helsinki ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Manchester (United Kingdom, about 10%) and Leeds (United Kingdom, about 10%).
Same genus: Aeshna
The closest relatives of the Brown Hawker that you can see in Helsinki (genus Aeshna, Hawkers and Typical Darners) are Southern Hawker (about 10%) and Migrant Hawker (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Brown Hawker is recorded against all the insects logged in Helsinki (47 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.
