Taiga by the tail?

We had a little bit of excitement here on sunday, when after a good mornings catch, Chris, a ringer over here from the US of A doing a post doc, fetched what i first thought was a 1cy red breasted flycatcher out of the bag. i immediateley told him to hand it over as the senior ringer i was not going to let a ringing tick get away from me. So after ringing i began to examine the bird more thoroughly i first noticed the dark bill then checked the tail coverts which were black, excitement was starting to build now, so i rebagged the bird and took it to my house to take photos and make a few calls as i needed more expert help and was soon joined by Barak, Meidad and Yoav. After many photos and a comparison with a bird from the shetlands i was thinking that it was probably a rbf after all as our bird seemed a little warmer in its plumage than the shetland bird.We were joined by Oz in time to release the bird and play some calls in an attempt to entice some voice from it but it promptly disappeared into the gardens. Later that evening however i received an email from Yoav with some very interesting links (which can be viewed at Yoav blog http://nubijar.blogspot.com/ ). After reading them and looking at the photos here i am a lot more optamistic now. But only time will tell and its in the hands of people with a lot more knowledge about this species than me.