Rabdophaga rosaria
In 3 days ~30% in a week ~50%
Rabdophaga rosaria is a gall midge which forms Camellia galls or terminal rosette gall on willow species. It was first described by Hermann Loew in 1850. Willows are extremely susceptible to gall induction and growth manipulation and Salix is one of the plant genera with the highest known numbers of associated galler species.
Rabdophaga rosaria is probably a group of closely related, unnamed species, possibly each restricted to one species of willow. Galls should be recorded as R rosaria and the host plant should also be recorded. The gall consists of from thirty to sixty leaves, shortened and crowded together in rosettes on white willow (S. alba), crack willow (S. fragilis), goat willow (S. caprea) and purple willow (S. purpurea) willows as well as the eared sallow (S. aurita) and grey sallow (S. cinerea). The oviposition of this species results in a chemical interaction that halts the lengthwise growth of infected willow shoots, the leaves however continue to develop and thus the characteristic "rose" forms at the tip of the affected shoot.
Rabdophaga rosaria is found on willow branches and the gall diameter depends upon the species, being... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Bavarian Forest National Park | 🇩🇪 Germany |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kharkiv | 🇺🇦 Ukraine | |
| 2 | Yekaterinburg | 🇷🇺 Russia | |
| 3 | Kazan | 🇷🇺 Russia | |
| 4 | Kyiv | 🇺🇦 Ukraine | |
| 5 | Moscow | 🇷🇺 Russia |
With luck
About 10% of wildlife watchers report a Willow Rose Gall Midge sighting in Kharkiv on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 168th most-seen of the 289 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
April and July
In those months about 20% of wildlife watchers report a Willow Rose Gall Midge in Kharkiv on a given day, against under 5% in May and August–March, the lowest months.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Willow Rose Gall Midge sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 5 cities where we can rate Willow Rose Gall Midge sightings, Kharkiv has the highest daily chance: about 10%. Next come Yekaterinburg (Russia, under 5%) and Kazan (Russia, under 5%).
GBIF citizen-science records
It is estimated from how often the Willow Rose Gall Midge is recorded against all the insects logged in Kharkiv (7 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.
