I am gobsmacked at the number of birds you managed to find and photograph so late in the morning. I find that by 9 o'clock there is very little to see, or to hear. Today it quieted right down after 7:45 a.m. Just when the light gets better the warblers vanish. Your Pine warbler is a juvenile Bay-breasted. You can see the streaks on its back and a slight blush of ruddy on its flank. BTW, your third shot is a Canada warbler. Yellow throat and breast and belly, white undertail, dark necklace of obsidian (although faint on your bird) around the breast, white eye ring. A Nashville has yellow under the tail instead of white and it doesn't have the necklace. Both species tend to be steely gray-blue on the crown and back and have a bold white eye ring. This all pertains to the juvenile bird.
