Acrocephalus schoenobaenus
Silhouette: Yves Hoebeke · PhyloPic
In 3 days ~40% in a week ~60%
The sedge warbler (Acrocephalus schoenobaenus) is an Old World warbler in the genus Acrocephalus. It is a medium-sized warbler with a brown, streaked back and wings and a distinct pale supercilium. Sedge warblers are migratory, crossing the Sahara to get from their European and Asian breeding grounds to spend winter in Africa. The male's song is composed of random chattering phrases and can include mimicry of other species. The sedge warbler is mostly insectivorous.
The sedge warbler was formally described by the Swedish naturalist Carl Linnaeus in 1758 in the tenth edition of his Systema Naturae under the binomial name Motacilla schoenobaenus. The species is now placed in the genus Acrocephalus that was introduced in 1811 by Johann Andreas Naumann and his son Johann Friedrich Naumann. British ornithologists did not distinguish the species from the common reed warbler until the 18th century. The genus name Acrocephalus is from Ancient Greek akros, "highest", and kephale, "head". It is possible that the Naumanns thought akros meant "sharp-pointed". The specific schoenobaenus is from Ancient Greek skhoinos, "reed", and baino, "to tread". It is a translation of the old Swedish... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Biebrza National Park | 🇵🇱 Poland | |
| 2 | Fertő-Hanság National Park | 🇭🇺 Hungary | |
| 3 | Białowieża National Park | 🇵🇱 Poland | |
| 4 | Hortobágy National Park | 🇭🇺 Hungary | |
| 5 | Kiskunság National Park | 🇭🇺 Hungary | |
| 6 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 7 | Wadden Sea National Park | 🇩🇪 Germany | |
| 8 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 9 | Doñana National Park | 🇪🇸 Spain | |
| 10 | Cairngorms National Park | 🇬🇧 United Kingdom | |
| 11 | Sierra Nevada National Park | 🇪🇸 Spain | |
| 12 | Monfragüe National Park | 🇪🇸 Spain | |
| 13 | Amboseli National Park | 🇰🇪 Kenya | |
| 14 | Gauja National Park | 🇱🇻 Latvia | |
| 15 | Tsavo West National Park | 🇰🇪 Kenya | |
| 16 | Nairobi National Park | 🇰🇪 Kenya | |
| 17 | Serengeti National Park | 🇹🇿 Tanzania | |
| 18 | Chobe National Park | 🇧🇼 Botswana | |
| 19 | Lake Nakuru National Park | 🇰🇪 Kenya | |
| 20 | Camargue | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Brazzaville | 🇨🇬 Republic of the Congo | |
| 2 | Helsinki | 🇫🇮 Finland | |
| 3 | Jerusalem | 🇮🇱 Israel | |
| 4 | Dakar | 🇸🇳 Senegal | |
| 5 | Minsk | 🇧🇾 Belarus | |
| 6 | Saint Petersburg | 🇷🇺 Russia | |
| 7 | Rotterdam [The Hague] | 🇳🇱 Netherlands | |
| 8 | Beirut | 🇱🇧 Lebanon | |
| 9 | Nizhny Novgorod | 🇷🇺 Russia | |
| 10 | Antalya | 🇹🇷 Turkey |
With luck
About 10% of wildlife watchers report a Sedge Warbler sighting in Snowdonia National Park on a given day, based on 214 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 69th most-seen of the 164 birds we can rate there. Over three days the chance rises to about 40%, and over a week to about 60%, if each day is a fresh chance.
May and June
In those months about 30% of wildlife watchers report a Sedge Warbler in Snowdonia National Park on a given day, against under 5% in August to March, the lowest months.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Sedge Warbler sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
6th of 20
Of the 20 parks where we can rate Sedge Warbler sightings, Snowdonia National Park ranks 6th at about 10%. The best odds are in Biebrza National Park (Poland, about 50%), Fertő-Hanság National Park (Hungary, about 40%) and Białowieża National Park (Poland, about 40%). All parks ranked.
GBIF citizen-science records
It is estimated from how often the Sedge Warbler is recorded against all the birds logged in Snowdonia National Park (214 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.
