Ok, yes, it's taken a long time to review some of the birds from last season. Still, maybe it makes a nice change from the id requests for 'real' birds outside at this time of year.
This warbler was in mixed forest (pine, hemlock, oak, maple, birch) along 16 mile creek in Oakville ON this spring in early May. There were also a Palm Warbler, several Yellow Rumped Warblers, a male Black Throated Blue warbler, a male Nashville, and chickadees around.
I'm posting the originals and copies with shadows brightened 30%. It could have a yellow wash reflected from foliage etc, but it seems to be ok. I can see 2 warblers in my guide that might be it: both were at that location during that week and both are common.
Any good guesses?
[attachment=2:1t6za7ei]UnknownWarblerOne.jpg[/attachment:1t6za7ei]
[attachment=1:1t6za7ei]UnknownWarblerTwo.jpg[/attachment:1t6za7ei]
[attachment=0:1t6za7ei]UnknownWarblerThree.jpg[/attachment:1t6za7ei]