Bird of the day, the Black-throated Blue Warbler!
By far, the most exciting find of the day was the female Black-throated Blue Warbler, observed by local birder Steve Schnoll. Not only was Steve able to find the bird, but he also got excellent images of it as well.
The female displays strikingly different plumage from the male. Females are a plain brownish-olive with buffy underparts and a subtle face pattern. Steve reported that the small white patch on the wing was instrumental in his identification of the bird.
Here on Bonaire, it was observed in shrubby habitat, coincidentally in the same area as a Prothonotary Warbler (another very nice observation!) and several Blackpoll Warblers. Bonaire is on the extreme southern border of the over-wintering grounds for the Black-throated Blue Warbler, so definitely it was an exciting find!