Warbler in Help Me Identify a North American Bird Posted August 25, 2018 Hello, I don't have a picture but I am wondering about an observation made today just north of Toronto, ON. In small mixed group of warblers I saw one in the canopy about 20 ft off the ground. I saw a white underside with black on the corners of the tail and some bluish/black streaks on the sides. My first thought was Cerulean but that would be quite rare. I thought maybe black-throated blue, but pretty sure I eliminated that. I cannot think of what else it could be and I am wondering if you can think of any other possibilities based on that description. Thank you.