Where to see Willow Warbler
Phylloscopus trochilus · Monthly patterns and locations based on open observation data.
- locations with data
- 88
- GBIF counts
- 143,158
- family
- Phylloscopidae
The strongest months in the historical data are April, May and August.
Monthly pattern
Monthly totals
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sept
Oct
Nov
Dec
Locations with sufficient data
- Noordhollands DuinreservaatNoord-Holland20,090 GBIF counts
- WaddenzeeFriesland13,235 GBIF counts
- Meijendel & BerkheideZuid-Holland10,276 GBIF counts
- BiesboschNoord-Brabant9,272 GBIF counts
- VoordeltaZeeland4,074 GBIF counts
- GrevelingenZeeland1,837 GBIF counts
- Westerschelde & SaeftingheZeeland1,742 GBIF counts
- IJsselmeerFriesland1,626 GBIF counts
- Duinen AmelandFriesland1,469 GBIF counts
- Kennemerland-ZuidNoord-Holland23,588 GBIF counts
- OostvaardersplassenFlevoland7,261 GBIF counts
- VeluweGelderland5,129 GBIF counts
- LauwersmeerGroningen2,041 GBIF counts
- Vlakte van de RaanZeeland1,692 GBIF counts
- NoordzeekustzoneNoord-Holland15,609 GBIF counts
- FochteloërveenDrenthe2,344 GBIF counts
- Zwanenwater & PettemerduinenNoord-Holland2,121 GBIF counts
- Oostelijke VechtplassenNoord-Holland900 GBIF counts
- DwingelderveldDrenthe1,352 GBIF counts
- Drentsche Aa-gebiedDrenthe1,259 GBIF counts
- ArkemheenGelderland752 GBIF counts
- Krammer-VolkerakZuid-Holland713 GBIF counts
- RijntakkenGelderland1,166 GBIF counts
- OosterscheldeZeeland655 GBIF counts
- VeluwerandmerenFlevoland855 GBIF counts
- Solleveld & KapittelduinenZuid-Holland493 GBIF counts
- Groote PeelNoord-Brabant426 GBIF counts
- MarkiezaatNoord-Brabant695 GBIF counts
- Vecht- en Beneden-ReggegebiedOverijssel1,144 GBIF counts
- Voornes DuinZuid-Holland603 GBIF counts
- Schoorlse DuinenNoord-Holland390 GBIF counts
- Duinen TerschellingFriesland573 GBIF counts
- Duinen SchiermonnikoogFriesland371 GBIF counts
- Eemmeer & Gooimeer ZuidoeverNoord-Holland531 GBIF counts
- MaasduinenLimburg269 GBIF counts
- Loonse en Drunense Duinen & LeemkuilenNoord-Brabant441 GBIF counts
- Sallandse HeuvelrugOverijssel438 GBIF counts
- LepelaarplassenFlevoland210 GBIF counts
- Strabrechtse Heide & BeuvenNoord-Brabant337 GBIF counts
- ZuidlaardermeergebiedGroningen593 GBIF counts
- Duinen Goeree & Kwade HoekZuid-Holland182 GBIF counts
- De WiedenOverijssel259 GBIF counts
- LeekstermeergebiedDrenthe395 GBIF counts
- Leenderbos, Groote Heide & De PlateauxNoord-Brabant277 GBIF counts
- Alde FeanenFriesland127 GBIF counts
- Buurserzand & HaaksbergerveenOverijssel185 GBIF counts
- Kop van SchouwenZeeland176 GBIF counts
- Deurnsche Peel & MariapeelNoord-Brabant321 GBIF counts
- HoltingerveldDrenthe153 GBIF counts
- Abtskolk & De PuttenNoord-Holland164 GBIF counts
- Ilperveld, Varkensland, Oostzanerveld & TwiskeNoord-Holland226 GBIF counts
- Polder ZeevangNoord-Holland208 GBIF counts
- MeinwegLimburg123 GBIF counts
- Hollands DiepNoord-Brabant105 GBIF counts
- Duinen VlielandFriesland116 GBIF counts
- NaardermeerNoord-Holland128 GBIF counts
- BrunssummerheideLimburg53 GBIF counts
- Duinen en Lage Land TexelNoord-Holland95 GBIF counts
- Kampina & Oisterwijkse VennenNoord-Brabant79 GBIF counts
- Duinen Den Helder-CallantsoogNoord-Holland86 GBIF counts
- Kempenland-WestNoord-Brabant93 GBIF counts
- Westduinpark & WapendalZuid-Holland50 GBIF counts
- AamsveenOverijssel38 GBIF counts
- Brabantse WalNoord-Brabant80 GBIF counts
- BorkeldOverijssel65 GBIF counts
- ZouweboezemUtrecht53 GBIF counts
- Ketelmeer & VossemeerOverijssel52 GBIF counts
- Oude MaasZuid-Holland60 GBIF counts
- Wooldse VeenGelderland38 GBIF counts
- Landgoederen BrummenGelderland58 GBIF counts
- BargerveenDrenthe78 GBIF counts
- Rottige Meenthe & BrandemeerFriesland41 GBIF counts
- Regte Heide & Riels LaagNoord-Brabant34 GBIF counts
- Manteling van WalcherenZeeland32 GBIF counts
- Vlijmens Ven, Moerputten & Bossche BroekNoord-Brabant26 GBIF counts
- Groote WielenFriesland18 GBIF counts
- Zwarte MeerFlevoland13 GBIF counts
- Veerse MeerZeeland14 GBIF counts
- Springendal & Dal van de MosbeekOverijssel25 GBIF counts
- ZoommeerZeeland25 GBIF counts
- Sarsven en De BanenLimburg20 GBIF counts
- Boezems KinderdijkZuid-Holland13 GBIF counts
- LeudalLimburg5 GBIF counts
- KorenburgerveenGelderland18 GBIF counts
- De BruukGelderland6 GBIF counts
- CoepelduynenZuid-Holland7 GBIF counts
- Drents-Friese Wold & LeggelderveldFriesland6 GBIF counts
- Zwin & KievittepolderZeeland5 GBIF counts
Data source
Counts are aggregated from open observation data supplied through GBIF. They indicate historical reporting patterns, not guaranteed current presence. Last processed: 28 July 2026.