Blyth`s Reed Warbler ?? (2 Viewers)

[oguenaydin]

Hi,

Ankara 23.08.2024

Can this bird be a Blyth`s Reed Warbler ??

 

[KenM]

It could be, if I’m reading the wing formula correctly (superb shot by the way 👍)
With the emargination on p3 falling in line (within the overlying tertial alignment) and with the pp being 50% of the overlying tertials.

Of course I should have mentioned that the downside could be a Reed Warbler that hadn’t fully grown it’s primaries/tail feathers out.

Cheers

 

[Grahame Walbridge]

It could be, if I’m reading the wing formula correctly (superb shot by the way 👍)
With the emargination on p3 falling in line (within the overlying tertial alignment) and with the pp being 50% of the overlying tertials.

Of course I should have mentioned that the downside could be a Reed Warbler that hadn’t fully grown it’s primaries/tail feathers out.

Cheers

Ken, you are misinterpreting the WF.

It is a Common Reed Warbler, P2=P4 and emarganate only P3. There is nothing about the face pattern, bare parts or WF that suggest Blyth's.

Grahame.

 

[KenM]

Ken, you are misinterpreting the WF.

It is a Common Reed Warbler, P2=P4 and emarganate only P3. There is nothing about the face pattern, bare parts or WF that suggest Blyth's.

Grahame.

Graham, would you agree if that being the case, the primaries are not fully grown?

The prims. can’t be fully grown as I understand it, because RW prims. are equal to tertial length which they clearly aren’t in the OP’s image they’re 50%.
Surely the only way that could be, would be for the bird to be able to contract it’s prims…now that really would throw the cat amongst the BRW’s. concerning images supplied.

Regarding bare part colouration and face pattern, aren’t these generally regarded as being variable and light dependant?

Cheers

 

[Grahame Walbridge]

Graham, would you agree if that being the case, the primaries are not fully grown?

The prims. can’t be fully grown as I understand it, because RW prims. are equal to tertial length which they clearly aren’t in the OP’s image they’re 50%.
Surely the only way that could be, would be for the bird to be able to contract it’s prims…now that really would throw the cat amongst the BRW’s. concerning images supplied.

Regarding bare part colouration and face pattern, aren’t these generally regarded as being variable and light dependant?

Cheers

Ken, the bird's age is irrelevant, but yes, its a young bird. You seem to have an issue measuring pp which is clearly >50% IMHO, though agree its toward the bottom end for RW. Relative position of emargination is within range. What's not in question is the long P2 which falls level with P4; CRW P2=P3/5 versus BRW P2=P5/7 (=7 or 7/8) + only see emarganated P3.

The OP has an obvious white eyering, lacks a dark loral spot/line, no extension of supercilium beyond eye and bill lacks a dark distal tip which support ID as CRW.

Grahame

 

[KenM]

Ken, the bird's age is irrelevant, but yes, its a young bird. You seem to have an issue measuring pp which is clearly >50% though agree its toward the bottom end for RW. Relative position of emargination is within range. What's not in question is the long P2 which falls level with P4; CRW P2=P3/5 versus BRW P2=P5/7 (=7 or 7/8) + only see emarganated P3.

The OP has an obvious white eyering, lacks a dark loral spot/line, no extension of supercilium beyond eye and bill lacks a dark distal tip which support ID as CRW.

Grahame

Graham, as it’s a young bird (assumed RW) p2 and p4 currently s/s, what might their relativity be when the prims are fully grown between 65-100% of overlying tertials…surely that s/s will have altered somewhat?

I’ve not had the good fortune to observe an adult BRW, however I’ve had close proximity uninterrupted views, on an almost daily basis of a 1st Winter bird for almost 3 weeks a few years back now.

At the time I looked in vain for the darker distal tip which was absent, as was the concolourous grey rump…which was a warm brown!
Neither feature supported “classic” 1st Winter BRW.

Subsequent to this, I’ve trawled the net for Summer birds and found that variability in tonal values are not infrequent due to the external ambient lighting and no doubt camera settings at the time.

Hence my reliance on the wing formula, the tonal values of the OP’s bird were quite unlike my October bird, showing no rufous washes whatsoever apart from the rump.
Indeed it was a rather cold looking grey brown bird.

Back to the OP’s bird, the operative words in my first response paragraph were “might be”, also suggesting the alternative option of a young RW, attempting to show both possible options, thus I believe I “covered” my initial suggestions.

Cheers

 

[pete wragg]

Graham, as it’s a young bird (assumed RW) p2 and p4 currently s/s, what might their relativity be when the prims are fully grown between 65-100% of overlying tertials…surely that s/s will have altered somewhat?

I’ve not had the good fortune to observe an adult BRW, however I’ve had close proximity uninterrupted views, on an almost daily basis of a 1st Winter bird for almost 3 weeks a few years back now.

At the time I looked in vain for the darker distal tip which was absent, as was the concolourous grey rump…which was a warm brown!
Neither feature supported “classic” 1st Winter BRW.

Subsequent to this, I’ve trawled the net for Summer birds and found that variability in tonal values are not infrequent due to the external ambient lighting and no doubt camera settings at the time.

Hence my reliance on the wing formula, the tonal values of the OP’s bird were quite unlike my October bird, showing no rufous washes whatsoever apart from the rump.
Indeed it was a rather cold looking grey brown bird.

Back to the OP’s bird, the operative words in my first response paragraph were “might be”, also suggesting the alternative option of a young RW, attempting to show both possible options, thus I believe I “covered” my initial suggestions.

Cheers

some people might question whether your bird,that lacked many of the features of BRW,actually was a BRW😉

 

[KenM]

some people might question whether your bird,that lacked many of the features of BRW,actually was a BRW😉

You’d better take that up with BBRC then.😉