Those goldfinches are related to canaries Mark. They're so beautiful with their bright yellow color.
We used to get a lot more orioles here but very few now. I'm lucky to even see them let alone catch them at a feeder.
I use to have a thistle feeder but gave it up as, like Jen says they are such little pigs! My feeders are a combination of regular bird seed with more sunflower seed added and sometimes some thistle seed added as well (Mombo's Mix). One stop eating for all comers. I used to do suet too but quit as with the right feeder the woodpeckers will feed from them as well.
The only problem is that the larger birds eat too much and keep the smaller guys and gals from getting their fair share. So I have to have multiple feeders. This summer I even have a pair of pigeons showing up! Don't know where they came from.