It has been a good migration so far in the Portland area, with nice weather and good numbers of songbirds being reported. Swainson’s Thrushes always come through our property in September to eat dogwood berries. At night, you can hear the calls of these birds as they fly overhead.
Sunrise at Pittock Mansion (Birding Oregon p. 70) This tree, a large birch, was a warbler magnet this year, attracting all the common species plus two Northern Parulas. I missed the parulas by one day.
Orange-crowned Warbler, Pittock Mansion
Birds are not the only autumn migrants. Lots of dragonflies are on the move, as well. I don’t know the dragonflies, so if you can ID this one, please leave a comment.
Ethical Birder 
I’d guess meadowhawk on the dragonfly. They are pretty.