I would love to spot a Purple Finch again, especially one with that level of colour.
The warbler you photographed is a Black-throated Green warbler. Haven't seen one
yet during the fall migration. It was very quiet today in the woodlot across the street
despite the cold front descending from the north that should have delivered a few birds.
Clearly, they seem to prefer the west end. Your 600mm is amazing. What impressive
reach. I wonder what it is like? Your left arm must have acquired good muscle tone by now.