Sorry, I post the below message at the same time as you was posted this second pic, but that still not of better help.
" I'm not sure it is possible to separate Two-barred from Arctic Warbler with only this picture. One showing the primary projection would be of good help.
BTW the migration time fit better Arctic Warbler.
All the best,
Jonathan"
[ Last edited by Jonathmartinez at 4/05/2013 23:08 ]