Locustella naevia
Silhouette: Afsarnayakkan · PhyloPic
In 3 days ~10% in a week ~20%
The common grasshopper warbler or just grasshopper warbler (Locustella naevia) is a species of Old World warbler in the genus Locustella. It breeds across much of temperate Europe and the western Palearctic. It is migratory, wintering across northern tropical Africa just south of the Sahara, and also locally in India.
This small passerine bird is found in dense grassland vegetation, often close to water, and usually with a few small scattered shrubs. It is a medium-sized warbler about 13 cm (5 in) long. The adult has a streaked brown back and whitish grey underparts which are unstreaked except on the undertail coverts. The sexes are identical, as with most warblers, but young birds are yellower below. Like most warblers, it is insectivorous. Four to seven eggs are laid in a nest on or near the ground in thick vegetation or in a tussock of grass.
This is a species which skulks in the undergrowth, creeping through bushes and low foliage, and which is very difficult to see except when singing from a prominent position. The song, which gives this species its name, is a mechanical grasshopper-like reeling, often given at dawn or dusk.
The Italian naturalist Ulisse Aldrovandi... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Biebrza National Park | 🇵🇱 Poland | |
| 2 | Fertő-Hanság National Park | 🇭🇺 Hungary | |
| 3 | Białowieża National Park | 🇵🇱 Poland | |
| 4 | Kiskunság National Park | 🇭🇺 Hungary | |
| 5 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 6 | Hortobágy National Park | 🇭🇺 Hungary | |
| 7 | Wadden Sea National Park | 🇩🇪 Germany | |
| 8 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 9 | Cairngorms National Park | 🇬🇧 United Kingdom | |
| 10 | Camargue | 🇫🇷 France | |
| 11 | Pyrénées National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Novosibirsk | 🇷🇺 Russia | |
| 2 | Yekaterinburg | 🇷🇺 Russia | |
| 3 | Manchester | 🇬🇧 United Kingdom | |
| 4 | Vasai-Virar | 🇮🇳 India | |
| 5 | Warsaw | 🇵🇱 Poland | |
| 6 | Birmingham | 🇬🇧 United Kingdom | |
| 7 | Kalyan-Dombivli | 🇮🇳 India | |
| 8 | Prague | 🇨🇿 Czechia | |
| 9 | Kyiv | 🇺🇦 Ukraine | |
| 10 | Saint Petersburg | 🇷🇺 Russia |
Rare
Under 5% of wildlife watchers report a Grasshopper Warbler sighting in Hortobágy National Park on a given day, based on 16 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 170th most-seen of the 202 birds we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
April and May
In those months about 10% of wildlife watchers report a Grasshopper Warbler in Hortobágy National Park on a given day, against under 5% in June to March, the lowest months.
Between 6 and 9 am
Across all the parks we cover, that three-hour window holds the most Grasshopper Warbler sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is most active around dawn and dusk.
6th of 11
Of the 11 parks where we can rate Grasshopper Warbler sightings, Hortobágy National Park ranks 6th at under 5%. The best odds are in Biebrza National Park (Poland, about 20%), Fertő-Hanság National Park (Hungary, about 10%) and Białowieża National Park (Poland, about 10%).
GBIF citizen-science records
It is estimated from how often the Grasshopper Warbler is recorded against all the birds logged in Hortobágy National Park (16 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.
