The only reason I guessed young orchard oriole is because when I looked in my Peterson book, the young orchard oriole seemed to be the only one with that dark area under it's beak.

It would be awesome to have one of those visiting the feeder. My Baltimore Oriole only shows up very early in morning or when nobody is around

Glad you have new birds. I am in the east an have Baltimore Orioles, Grosbeaks and Hummers and love them all. One thing I'd like to tell you that you may not be aware of is that nine days is a very long time to leave a nectar feeder filled. They need to be cleaned a minimum of once a week in cool weather to every couple of days in hot weather. Black mold and fungus' form easy in the sugar water which is not good for the birds. Hummers can contract bill rot from dirty feeders and it is fatal for them. Wash them out is hot soapy water with a toothbrush and refill. Yes the same birds will return nest year if they like it there. In my yard they feed really heavy now but much less when the wild berries and friuts come out until right before migration. Happy birding. Cathy

now have 6 pairs of bullocks orioles nesting close by and 5 pairs of western tanagers. useing a gallon of necter a day for them and the hummingbirds Image link: