Western Bonelli's Warbler
Western Bonelli's WarblerWestern Bonelli's WarblerWestern Bonelli's WarblerWestern Bonelli's Warbler

Western Bonelli's Warbler

Phylloscopus bonelli

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

The western Bonelli's warbler (Phylloscopus bonelli) is a warbler in the leaf warbler genus Phylloscopus. It was formerly regarded as the western subspecies of a wider "Bonelli's warbler" species, but as a result of modern taxonomic developments, they are now usually considered to be two species: Western Bonelli's warbler, Phylloscopus bonelli, which breeds in southwest Europe and north Africa Eastern Bonelli's warbler, Phylloscopus orientalis, which breeds in southeast Europe and Asia Minor The breeding ranges of the two species do not overlap; while their appearance and songs are very similar, the calls are completely different (see below). They also show marked difference in mtDNA sequence. The species is migratory, wintering in sub-Saharan Africa. It is a rare vagrant in Northern Europe. The genus name Phylloscopus is from Ancient Greek phullon, "leaf", and skopos, "seeker" (from skopeo, "to watch"). Wikipedia →

10–20% of wildlife watchers report a Western Bonelli's Warbler sighting in Sierra de Guadarrama National Park, based on 723 days of visitor records from GBIF citizen-science data.

Closest Relatives at Sierra de Guadarrama National Park

Common Chiffchaff
LC

Common Chiffchaff

☀️ Diurnal Bird

Phylloscopus collybita

20–30% · Possible
Willow Warbler
LC

Willow Warbler

☀️ Diurnal Bird

Phylloscopus trochilus

5–10% · Rare
Iberian Chiffchaff
LC

Iberian Chiffchaff

Bird

Phylloscopus ibericus

<5% · Rare
Chaffinch
LC

Chaffinch

☀️ Diurnal Bird

Fringilla coelebs

60–70% · Likely
Eurasian Blackbird
LC Endemic

Eurasian Blackbird

☀️ Diurnal Bird

Turdus merula

60–70% · Likely
Great Tit
LC Endemic

Great Tit

☀️ Diurnal Bird

Parus major

60–70% · Likely
European Robin
LC

European Robin

☀️ Diurnal Bird

Erithacus rubecula

50–60% · Likely
Eurasian Magpie
LC

Eurasian Magpie

🌅 Crepuscular Bird

Pica pica

50–60% · Likely
Blue Tit
LC

Blue Tit

☀️ Diurnal Bird

Cyanistes caeruleus

50–60% · Likely
Carrion Crow
LC

Carrion Crow

☀️ Diurnal Bird

Corvus corone

50–60% · Likely
Spotless Starling
LC

Spotless Starling

🌅 Crepuscular Bird

Sturnus unicolor

40–50% · Likely
White Wagtail
LC

White Wagtail

☀️ Diurnal Bird

Motacilla alba

40–50% · Likely

📅 Monthly Probability

<5
Jan
<5
Feb
<5
Mar
20–30
Apr
30–40
May
30–40
Jun
30–40
Jul
10–20
Aug
<5
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 Mercantour National Park 🇫🇷 France
20–30%
2 Cévennes National Park 🇫🇷 France
20–30%
3 Sierra de Guadarrama National Park 🇪🇸 Spain
10–20%
4 Ordesa y Monte Perdido National Park 🇪🇸 Spain
10–20%
5 Pyrénées National Park 🇫🇷 France
10–20%
6 Picos de Europa National Park 🇪🇸 Spain
10–20%
7 Aigüestortes National Park 🇪🇸 Spain
10–20%
8 Triglav National Park 🇸🇮 Slovenia
5–10%
9 Sierra Nevada National Park 🇪🇸 Spain
5–10%
10 Niokolo-Koba National Park 🇸🇳 Senegal
<5%
11 Doñana National Park 🇪🇸 Spain
<5%
12 Monfragüe National Park 🇪🇸 Spain
<5%
13 Fertő-Hanság National Park 🇭🇺 Hungary
Insufficient data
14 Wadden Sea National Park 🇩🇪 Germany
Insufficient data

Quick answers

What are the chances of seeing a Western Bonelli's Warbler in Sierra de Guadarrama National Park?

About 18% of wildlife watchers report a Western Bonelli's Warbler sighting in Sierra de Guadarrama National Park, based on 723 days of visitor records from GBIF citizen-science data.

When is the best time to see Western Bonelli's Warbler in Sierra de Guadarrama National Park?

May has the highest sighting rate for Western Bonelli's Warbler in Sierra de Guadarrama National Park in our monthly data.

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