Another Warbler in VietNam (2 Viewers)

[glennmanc]

This was on Mount Lang Bian (1800m) this morning. The common spp here are YBW, Kloss's and Blyth's, but this one has a very white, broad supercilium, especially at the front of the eye (too white for Kloss's which was singing nearby). I thought of Ashy-throated since the wing-bar is quite broad, but that appears to be ruled out by the pale lower mandible. It was very active in one area of a small tree in mixed pine/evergreen forest and only seen from below. It was completely and unhelpfully silent during 1-2 minutes in the same tree. The 3 photos were taken in a 30sec period.

 

[Grahame Walbridge]

Glenn, 3 is a Kloss's Leaf Warbler ssp. klossi based on under tail pattern and note very strong yellow suffusion to underparts.

Grahame

 

[andyb39]

This comparison of undertail patterns might prove useful:

https://ayuwat.files.wordpress.com/2015/08/phylloscopus012.jpg

Kloss's is labelled intensior - it should be ogilviegranti.

 

[Grahame Walbridge]

This comparison of undertail patterns might prove useful:

https://ayuwat.files.wordpress.com/2015/08/phylloscopus012.jpg

Kloss's is labelled intensior - it should be ogilviegranti.

Why is this not intensior Andy? It's tail pattern is very similar and overlaps with Kloss's ssp. klossi but should be well out of range- SE Thailand & SW Cambodia. And following a reshuffle intensior has been recently reassigned to Davison's resulting in the removal of Kloss's from the Thai avifauna.

Grahame

 

[glennmanc]

Thanks. I should learn more about undertail patterns! Kloss's are singing continually at this time of year, so I don't often have to look closely. Perhaps this silent one was a female.

 

[glennmanc]

Is there a webpage that shows other undertail patterns (e.g. Yellow-browed, Ashy-throated, etc)?

 

[glennmanc]

PS This is something that all the Field Guides seem to neglect

 

[andyb39]

Why is this not intensior Andy? It's tail pattern is very similar and overlaps with Kloss's ssp. klossi but should be well out of range- SE Thailand & SW Cambodia. And following a reshuffle intensior has been recently reassigned to Davison's resulting in the removal of Kloss's from the Thai avifauna.

Grahame

Grahame, I was reading the article below about a sighting of Kloss's Warbler at Khao Yai dating back to 2015 and the graphic was at the bottom of the webpage. What I didn't realise was that since then the taxonomy has been revised and intensior is now part of White-tailed Leaf Warbler, along with muleyitensis, formerly known as davisoni(?). So which one is this bird? - according to HBW, intensior only occurs in SE Thailand, but if we go by tail pattern, it should be this taxon we see here. :eek!:

https://ayuwat.wordpress.com/2015/08/20/klosss-leaf-warbler-at-khao-yai/