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Difference between revisions of "Willow Warbler" - BirdForum Opus

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[[Image:Willy 32.jpg|thumb|550px|right|Photo by mali <br />Location: Lakenheath Warren, [[England]]]]
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[[Image:Willy 32.jpg|thumb|550px|right|''P. t. trochilus'' adult <br />Photo &copy; by {{user|mali|mali}} <br />Lakenheath Warren, [[England]], 29 April 2007]]
 
;[[:Category:Phylloscopus|Phylloscopus]] trochilus
 
;[[:Category:Phylloscopus|Phylloscopus]] trochilus
 
==Identification==
 
==Identification==
11-12.5cm
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Length 11-12.5cm (4¼-5 in), weight 6.3-14.6 g <br />
*Greyish brown-green back,
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'''Adult''':
 +
*Greenish-yellowish-brown back,
 
*Pale underparts, tinged yellow on throat and breast
 
*Pale underparts, tinged yellow on throat and breast
*Whitish supercillium
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*Pale yellowish-white supercillium
 
*Thin brown bill
 
*Thin brown bill
*Brownish-pink or light brown legs<br />
+
*Brownish-yellow or light brown legs (although this is variable to some extent).
'''Juvenile and 1st Winter''': much yellower supercillium and underparts
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*Primary extension usually about 75%, cf [[chiffchaff]] <br />
====Confusion Species====
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[[Image:WillowWarblerDSCN2117.jpg|thumb|350px|right|''P. t. trochilus'' immature; a bright individual<br /> Photo &copy; by {{user|jmorlan|Joseph Morlan}}<br />North Sea, off [[Yorkshire]], [[England]], [[UK]], 04 August 2018]]
[[Image:WillowChiff.jpg|thumb|350px|right|Chiffchaff on the left and Willow Warbler on the right<br /> Photo by {{user|Steve+G|Steve G}}]]
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'''Juvenile and 1st Winter''':
 +
*Much yellower supercillium and underparts
 +
====Similar Species====
 
See [http://www.birdforum.net/showthread.php?t=15579 this discussion thread] for differences between [[Common Chiffchaff]] and Willow Warbler.
 
See [http://www.birdforum.net/showthread.php?t=15579 this discussion thread] for differences between [[Common Chiffchaff]] and Willow Warbler.
 +
 
==Distribution==
 
==Distribution==
Breeds throughout the [[British Isles]], [[Scandinavia]] and northern [[Russia]] south to central and south-east [[France]], [[Switzerland]] and [[Austria]], northern parts of [[Hungary]] and [[Romania]] and to about 50&deg;N in [[Ukraine]] and [[Russia]].  
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Widespread and abundant in the northern half of Europe and western Asia, scarcer towards northeastern Asia.
 +
 
 +
Breeds throughout the [[British Isles]], [[Scandinavia]] and northern [[Russia]] south to central and south-east [[France]], [[Switzerland]] and [[Austria]], northern parts of [[Hungary]] and [[Romania]], and east between about 50°N and 68°N across [[Russia]].
  
Leaves breeding areas in August-September, passage continuing until October, and winters in sub-Saharan [[Africa]], returning mainly in April. Abundant on passage over most of Europe, the Middle East and North Africa.  
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[[Image:WillowChiff.jpg|thumb|350px|right|Chiffchaff on the left and Willow Warbler on the right<br /> Photo by {{user|Steve+G|Steve G}}<br />Click on image to enlarge]]
 +
Arrives on the breeding areas mainly in April (late March in the south, May or even June in the far northeast), returning south in August-September, passage continuing until October, wintering in sub-Saharan [[Africa]]. Abundant on passage over most of Europe, the Middle East and North Africa. Birds from the far east of Siberia migrate over 15,000 km to winter in South Africa; in proportion to its size (125 ''million'' body lengths!), the longest migration of any bird.
  
 
'''Vagrants''' recorded on [[Iceland]], the [[Azores]] and [[Cape Verde Islands]], and in [[Alaska]].  
 
'''Vagrants''' recorded on [[Iceland]], the [[Azores]] and [[Cape Verde Islands]], and in [[Alaska]].  
 +
 
==Taxonomy==
 
==Taxonomy==
'''Subspecies:''' Nominate ''trochilus'' occurs over much of western [[Europe]]
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====Subspecies====
*''acredula'' in northern [[Scandinavia]] and [[Europe]] from [[Poland]] eastwards, very similar but duller and paler below with much less yellow on underparts of juvenile.
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[[Image:27356301.jpg|thumb|350px|right|Subspecies ''P. t. yakutensis''<br />Photo &copy; by {{user|Houman+Doroudi+(Tormtay)|Houman Doroudi (Tormtay)}}<br />Darabad Mountain, Tehran, [[Iran]], 20 April 2016]]
*Eastern race ''yakutensis'' drabber still, brown above and whitish below, occurs as a migrant in Region including [[Britain]] but other races can appear very similar.
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There are 3 subspecies<sup>[[#References|[1]]]</sup>:
==Habitat==  
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*''P. t. trochilus'': the most greeny-yellow subspecies; descrived above
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:*Western [[Europe]] to southern [[Scandinavia]], [[Poland]] and [[Romania]]; winters to western Africa
 +
*''P. t. acredula'': similar to nominate but duller and paler below with less yellow on underparts of juvenile.
 +
:*Northern [[Scandinavia]] east to central [[Siberia]] (Yenisey River); winters to southeastern [[South Africa]]
 +
*''P. t. yakutensis'': drabber still, light grey-brown above and whitish below
 +
:*Eastern Siberia (Taymyr Peninsula to Anadyr River); winters to southern Africa. Occurs as a migrant across central Asia and southeast Europe, and rarely as far west as [[Britain]], but ''P. t. acredula'' can appear very similar.
 +
 
 +
==Habitat==
 +
[[Image:Willow Warbler s IMG 5009 1024x705 .jpg|thumb|350px|right|Adult in flight<br />Photo &copy; by {{user|John+W+Clarkson|John W Clarkson}}<br />Bois Vert garden, Lot et Garonne, [[France]], 7 May 2015]]
 
Open deciduous woodland, bushy areas, parks and gardens. Also in mixed forest and young conifer plantations, hedgerows and shelterbelts. On passage occurs in all types of habitat with trees and bushes.
 
Open deciduous woodland, bushy areas, parks and gardens. Also in mixed forest and young conifer plantations, hedgerows and shelterbelts. On passage occurs in all types of habitat with trees and bushes.
 
==Behaviour==
 
==Behaviour==
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The diet includes small insects and spiders and fruit and berries.
 
The diet includes small insects and spiders and fruit and berries.
 
====Breeding====
 
====Breeding====
They build domed nest from grass, rotten wood, moss and roots, placed on the ground among shrubs or grass, with a side entrance, lined with fine roots and feathers. Three to nine smooth, glossy white eggs, speckled with reddish-brown, are laid and are incubated by the female for 13 days. Both parents feed the young, which fledge after about 13-16 days.
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The domed nest has a side entrance and is formed from grass, rotten wood, moss and roots, lined with feathers. It is placed on the ground amongst shrubs or long grass. The clutch consists of 3-9 smooth, glossy white eggs, speckled reddish-brown. The female incubates for around 13 days. Both adults feed the young, which fledge after about 13-16 days.
 
====Vocalisation====  
 
====Vocalisation====  
<flashmp3>Phylloscopus trochilus (song).mp3</flashmp3><br />
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{{ Audio|Phylloscopus trochilus (song).mp3 }}
''[[Media:Phylloscopus trochilus (song).mp3|Listen in an external program]]''
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''[[Media:Phylloscopus trochilus (song).mp3|Willow Warbler song clip]''
 
==References==
 
==References==
 +
#{{Ref-Clements6thAug18}}#Clement, P. (2018). Willow Warbler (''Phylloscopus trochilus''). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from https://www.hbw.com/node/58860 on 12 October 2018).
 +
#Howell, S.N.G., Lewington, W. & Russell, W. (2014) Rare Birds of North  America.  Princeton Univ. Press.
 
#Collins Pocket Guide to British Birds 1966
 
#Collins Pocket Guide to British Birds 1966
 
#Collins Bird Guide ISBN 0 00 219728 6
 
#Collins Bird Guide ISBN 0 00 219728 6
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#British Garden Birds
 
{{ref}}
 
{{ref}}
 +
 
==External Links==
 
==External Links==
{{GSearch|Phylloscopus+trochilus}}
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{{GSearch|"Phylloscopus trochilus" {{!}} "Willow Warbler"}}
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{{GS-checked}}
 
<br />
 
<br />
{{Video|Willow_Warbler}}
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<br />
[[Category:Birds]] [[Category:Phylloscopus]][[Category:Bird Songs]] [[Category:Videos]]
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 +
[[Category:Birds]] [[Category:Phylloscopus]] [[Category:Bird Songs]]

Latest revision as of 17:03, 14 November 2022

P. t. trochilus adult
Photo © by mali
Lakenheath Warren, England, 29 April 2007
Phylloscopus trochilus

Identification

Length 11-12.5cm (4¼-5 in), weight 6.3-14.6 g
Adult:

  • Greenish-yellowish-brown back,
  • Pale underparts, tinged yellow on throat and breast
  • Pale yellowish-white supercillium
  • Thin brown bill
  • Brownish-yellow or light brown legs (although this is variable to some extent).
  • Primary extension usually about 75%, cf chiffchaff
P. t. trochilus immature; a bright individual
Photo © by Joseph Morlan
North Sea, off Yorkshire, England, UK, 04 August 2018

Juvenile and 1st Winter:

  • Much yellower supercillium and underparts

Similar Species

See this discussion thread for differences between Common Chiffchaff and Willow Warbler.

Distribution

Widespread and abundant in the northern half of Europe and western Asia, scarcer towards northeastern Asia.

Breeds throughout the British Isles, Scandinavia and northern Russia south to central and south-east France, Switzerland and Austria, northern parts of Hungary and Romania, and east between about 50°N and 68°N across Russia.

Chiffchaff on the left and Willow Warbler on the right
Photo by Steve G
Click on image to enlarge

Arrives on the breeding areas mainly in April (late March in the south, May or even June in the far northeast), returning south in August-September, passage continuing until October, wintering in sub-Saharan Africa. Abundant on passage over most of Europe, the Middle East and North Africa. Birds from the far east of Siberia migrate over 15,000 km to winter in South Africa; in proportion to its size (125 million body lengths!), the longest migration of any bird.

Vagrants recorded on Iceland, the Azores and Cape Verde Islands, and in Alaska.

Taxonomy

Subspecies

Subspecies P. t. yakutensis
Photo © by Houman Doroudi (Tormtay)
Darabad Mountain, Tehran, Iran, 20 April 2016

There are 3 subspecies[1]:

  • P. t. trochilus: the most greeny-yellow subspecies; descrived above
  • P. t. acredula: similar to nominate but duller and paler below with less yellow on underparts of juvenile.
  • P. t. yakutensis: drabber still, light grey-brown above and whitish below
  • Eastern Siberia (Taymyr Peninsula to Anadyr River); winters to southern Africa. Occurs as a migrant across central Asia and southeast Europe, and rarely as far west as Britain, but P. t. acredula can appear very similar.

Habitat

Adult in flight
Photo © by John W Clarkson
Bois Vert garden, Lot et Garonne, France, 7 May 2015

Open deciduous woodland, bushy areas, parks and gardens. Also in mixed forest and young conifer plantations, hedgerows and shelterbelts. On passage occurs in all types of habitat with trees and bushes.

Behaviour

Diet

The diet includes small insects and spiders and fruit and berries.

Breeding

The domed nest has a side entrance and is formed from grass, rotten wood, moss and roots, lined with feathers. It is placed on the ground amongst shrubs or long grass. The clutch consists of 3-9 smooth, glossy white eggs, speckled reddish-brown. The female incubates for around 13 days. Both adults feed the young, which fledge after about 13-16 days.

Vocalisation

[[Media:Phylloscopus trochilus (song).mp3|Willow Warbler song clip]

References

  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2018. The eBird/Clements checklist of birds of the world: v2018. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
  2. Clement, P. (2018). Willow Warbler (Phylloscopus trochilus). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from https://www.hbw.com/node/58860 on 12 October 2018).
  3. Howell, S.N.G., Lewington, W. & Russell, W. (2014) Rare Birds of North America. Princeton Univ. Press.
  4. Collins Pocket Guide to British Birds 1966
  5. Collins Bird Guide ISBN 0 00 219728 6
  6. British Garden Birds

Recommended Citation

External Links

GSearch checked for 2020 platform.

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