I just checked the bird database, and both Eastern Phoebe and Olive-Sided Flycatcher seem to have a dark vest. Are they very similar looking, or can they easily be distinguished?
Because I have some rather fair-quality photographs of a flcyatcher with a dark vest (first thought was Phoebe, but it was pretty big, bigger than I remember most Phoebes). I could post the pictures later.
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Last 2007 year bird/lifer: Lapland Longspur (#51/136)
Last 2008 lifer: Red-Headed Woodpecker (#137)