Willow Warbler
Willow WarblerWillow WarblerWillow WarblerWillow Warbler

Willow Warbler

Phylloscopus trochilus

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered
10–20% · With luck
overall probability at Wadden Sea National Park
1,880 Verified records at Wadden Sea National Park
May Best month highest sighting rate
☀️ Diurnal When it's active during daytime hours (6am–6pm)

The willow warbler (Phylloscopus trochilus) is a very common and widespread leaf warbler which breeds throughout northern and temperate Europe and the Palearctic, from Ireland east to the Anadyr River basin in eastern Siberia. It is strongly migratory, with almost all of the population wintering in sub-Saharan Africa. It is a bird of open woodlands with trees and ground cover for nesting, including most importantly birch, alder, and willow habitats. The nest is usually built in close contact with the ground, often in low vegetation. Like most Old World warblers (Sylviidae), this small passerine is insectivorous. In northern Europe, it is one of the first warblers to return in the spring, though later than the closely related chiffchaff. Wikipedia →

10–20% of wildlife watchers report a Willow Warbler sighting in Wadden Sea National Park, based on 1,880 days of visitor records from GBIF citizen-science data.

Closest Relatives at Wadden Sea National Park

Common Chiffchaff
LC

Common Chiffchaff

☀️ Diurnal Bird

Phylloscopus collybita

40–50% · Likely
Yellow-browed Warbler
LC

Yellow-browed Warbler

🌅 Crepuscular Bird

Phylloscopus inornatus

<5% · Rare
Two-barred Warbler
LC

Two-barred Warbler

🌅 Crepuscular Bird

Phylloscopus plumbeitarsus

Insufficient data
Wood Warbler

Wood Warbler

☀️ Diurnal Bird

Phylloscopus sibillatrix

<5% · Rare
Hume's Warbler
LC

Hume's Warbler

☀️ Diurnal Bird

Phylloscopus humei

<5% · Rare
Pallas's Leaf-Warbler
LC

Pallas's Leaf-Warbler

Bird

Phylloscopus proregulus

<5% · Rare
Greenish Warbler
LC

Greenish Warbler

☀️ Diurnal Bird

Phylloscopus trochiloides

<5% · Rare
Dusky Warbler
LC

Dusky Warbler

☀️ Diurnal Bird

Phylloscopus fuscatus

<5% · Rare
Iberian Chiffchaff
LC

Iberian Chiffchaff

Bird

Phylloscopus ibericus

<5% · Rare
Arctic Warbler
LC

Arctic Warbler

☀️ Diurnal Bird

Phylloscopus borealis

<5% · Rare
Western Bonelli's Warbler
LC

Western Bonelli's Warbler

☀️ Diurnal Bird

Phylloscopus bonelli

Insufficient data
Radde's Warbler
LC

Radde's Warbler

🌅 Crepuscular Bird

Phylloscopus schwarzi

Insufficient data

📅 Monthly Probability

<5
Jan
<5
Feb
<5
Mar
30–40
Apr
40–50
May
30–40
Jun
10–20
Jul
10–20
Aug
5–10
Sep
<5
Oct
<5
Nov
<5
Dec

☀️ When They're Spotted

Most active during daytime hours (6am–6pm) · across all parks (global)

☀️Diurnal
☀️🌙🌙12am6am12pm6pm12am

Global Distribution

Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.

where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is)  ·  parks where it occurs — tap a pin for the sighting probability there

Parks Where Found

# Park Country Probability
1 Cairngorms National Park 🇬🇧 United Kingdom
40–50%
2 Biebrza National Park 🇵🇱 Poland
40–50%
3 Tatra National Park 🇸🇰 Slovakia
30–40%
4 Białowieża National Park 🇵🇱 Poland
20–30%
5 Snowdonia National Park 🇬🇧 United Kingdom
20–30%
6 Bavarian Forest National Park 🇩🇪 Germany
10–20%
7 Wadden Sea National Park 🇩🇪 Germany
10–20%
8 Lake Nakuru National Park 🇰🇪 Kenya
10–20%
9 Arusha National Park 🇹🇿 Tanzania
10–20%
10 Kafue National Park 🇿🇲 Zambia
10–20%
11 Awash National Park 🇪🇹 Ethiopia
10–20%
12 Tsavo West National Park 🇰🇪 Kenya
10–20%
13 Nairobi National Park 🇰🇪 Kenya
10–20%
14 Fertő-Hanság National Park 🇭🇺 Hungary
10–20%
15 Mkomazi National Park 🇹🇿 Tanzania
10–20%
16 Gauja National Park 🇱🇻 Latvia
10–20%
17 Meru National Park 🇰🇪 Kenya
10–20%
18 Lake Mburo National Park 🇺🇬 Uganda
5–10%
19 Etosha National Park 🇳🇦 Namibia
5–10%
20 Ngorongoro Conservation Area 🇹🇿 Tanzania
5–10%
21 Murchison Falls National Park 🇺🇬 Uganda
5–10%
22 Aberdare National Park 🇰🇪 Kenya
5–10%
23 Mana Pools National Park 🇿🇼 Zimbabwe
5–10%
24 South Luangwa National Park 🇿🇲 Zambia
5–10%
25 Tsavo East National Park 🇰🇪 Kenya
5–10%
26 Bale Mountains National Park 🇪🇹 Ethiopia
5–10%
27 Doñana National Park 🇪🇸 Spain
5–10%
28 Chobe National Park 🇧🇼 Botswana
5–10%
29 Niokolo-Koba National Park 🇸🇳 Senegal
5–10%
30 Kibale National Park 🇺🇬 Uganda
5–10%
31 Kidepo Valley National Park 🇺🇬 Uganda
5–10%
32 Akagera National Park 🇷🇼 Rwanda
5–10%
33 Hortobágy National Park 🇭🇺 Hungary
5–10%
34 Kruger National Park 🇿🇦 South Africa
5–10%
35 Gorongosa National Park 🇲🇿 Mozambique
5–10%
36 Serengeti National Park 🇹🇿 Tanzania
5–10%
37 Pyrénées National Park 🇫🇷 France
5–10%
38 Monfragüe National Park 🇪🇸 Spain
5–10%
39 Waterberg Plateau Park 🇳🇦 Namibia
5–10%
40 Liwonde National Park 🇲🇼 Malawi
5–10%
41 Ruaha National Park 🇹🇿 Tanzania
5–10%
42 Sierra Nevada National Park 🇪🇸 Spain
5–10%
43 Sierra de Guadarrama National Park 🇪🇸 Spain
5–10%
44 Kiskunság National Park 🇭🇺 Hungary
5–10%
45 Gonarezhou National Park 🇿🇼 Zimbabwe
5–10%
46 Ordesa y Monte Perdido National Park 🇪🇸 Spain
5–10%
47 Mikumi National Park 🇹🇿 Tanzania
<5%
48 Hwange National Park 🇿🇼 Zimbabwe
<5%
49 Tarangire National Park 🇹🇿 Tanzania
<5%
50 Masai Mara National Reserve 🇰🇪 Kenya
<5%
51 Semuliki National Park 🇺🇬 Uganda
<5%
52 Queen Elizabeth National Park 🇺🇬 Uganda
<5%
53 Pilanesberg National Park 🇿🇦 South Africa
<5%
54 Addo Elephant National Park 🇿🇦 South Africa
<5%
55 Lake Manyara National Park 🇹🇿 Tanzania
<5%
56 Amboseli National Park 🇰🇪 Kenya
<5%
57 Triglav National Park 🇸🇮 Slovenia
<5%
58 Volcanoes National Park 🇷🇼 Rwanda
<5%
59 Aigüestortes National Park 🇪🇸 Spain
<5%
60 Cévennes National Park 🇫🇷 France
<5%
61 Moremi Game Reserve 🇧🇼 Botswana
<5%
62 iSimangaliso Wetland Park 🇿🇦 South Africa
<5%
63 Samburu National Reserve 🇰🇪 Kenya
<5%
64 Virunga National Park 🇨🇩 Democratic Republic of the Congo
<5%
65 Picos de Europa National Park 🇪🇸 Spain
<5%
66 Hluhluwe-Imfolozi Park 🇿🇦 South Africa
<5%
67 Namib-Naukluft National Park 🇳🇦 Namibia
<5%
68 Bwindi Impenetrable National Park 🇺🇬 Uganda
<5%
69 Nyungwe National Park 🇷🇼 Rwanda
<5%
70 Garden Route National Park 🇿🇦 South Africa
<5%
71 Vatnajokull National Park 🇮🇸 Iceland
<5%
72 Lower Zambezi National Park 🇿🇲 Zambia
Insufficient data
73 Mercantour National Park 🇫🇷 France
Insufficient data

Quick answers

What are the chances of seeing a Willow Warbler in Wadden Sea National Park?

About 15% of wildlife watchers report a Willow Warbler sighting in Wadden Sea National Park, based on 1,880 days of visitor records from GBIF citizen-science data.

When is the best time to see Willow Warbler in Wadden Sea National Park?

May has the highest sighting rate for Willow Warbler in Wadden Sea National Park in our monthly data.

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