I don't really agree with Muppit and MacNara. I think the OP bird has black uppertail coverts that do not contrast with the tail, suggesting Taiga Fly. The black bill and grey tones also support Taiga Fly, as mentioned by Andy in Post #3. But the quality of the photos isn't great to confirm ID.
If this photo had come from Hong Kong (where Taiga is commoner but both occur) I wouldn't have considered the possibility of Red-breasted.
Hi John, I hope you are well there in HK and getting back a bit of normality (even though none of us knows how long it will last).
I'm wondering which photo you are referring to when you say 'this photo'? Is it the OP's photo four which I reproduced in my earlier post? One of the things that Japanese birder friends pointed out to me was that in Taiga the black of the tail simpy 'blends' into the brown of the back, but that in Red-breasted the brown upper-tail coverts show a kind of 'u' pushing into the black of the tail. They might be wrong, of course, and it could vary with individuals.
I would be interested to hear from
silverwing on what equipment was used to take these photos. He says 'filmed' which suggests video captures (but it might be a language error), but I still wonder if (whether stills or videos) the photos might be from a smartphone, in which case I also wonder whether the comments about 'grey tones' and bill colour are really relevant.
Anyway, I attach some photos showing what I mean.
Photo one is the Red-breasted (without the red breast) that I posted earlier, but showing it flying with the brown 'u' cutting into the black tail that I talk about clearly visible. Photo two shows my Taiga from Japan with the 'blending'. Photo three shows my other Japanese Red-breasted with the 'u' marked. Photo four shows Andy's bird with the same feature. And photo five shows the OP's photo four with the same feature. In my opinion.
I don't have any skin in the game here, in the sense of trying to show or deny that one of these (recently conspecific) birds is in Israel or Vietnam (although if it's in Japan and HK, I don't see why it might not be in Vietnam also - when we went to Cuc Phuong in Vietnam our government-supplied 'guide' could barely recognise a feral pigeon; on the positive side (21st century) he dumped us a couple of times because he had to pick up his kids from kindergarten because his wife was working (at a real job presumably).
But anyway I'd be interested to have someone point out what kind of black/brown margin or cutoff between the tail and uppertail coverts would separate these species?
And isn't this margin very difficult to see anyway, unless you have the same bird around for quite a few days, or you are very lucky?
I have recordings of the 'zit' of my local Red-breasted (the one without the red breast) but not of any of the others. It's winter, so they weren't singing anyway. Is this a feature that can distinguish these clearly?