I joined the forum recently.
I would like to ask for your suggestion.
In a reclaimed-land in western Japan, a strange shrike is observed in these days.
You can find photos from birders' blogs, for example,
(I just googled to find the photo)
It looks like Lanius cristatus superciliosus from colouring, but have a distinct white patch on primaries.
A few skilled birders are claiming that this is L. isabellinus.
But supercilium of L. isabellinus isabellinus is not so broad as this individual (Worfolk 2000).
L. i. phoenicuroides has distinct supercilium, but their distribution is so western to come to Far East (Worfolk 2000).
Is it truly a L. isabellinus with supercilium or a L. c. superciliosus with white patches?
I appreciate any comments.
Thanks in advance,