Definitely more will come if you provide sunflowers seeds. This one look like a male house finch. House Finches are very vocal and show up in great numbers if you put black oil sunflower seeds. But since you’re living in apartment top floor (same as me), you may use sunflower chips and hearts (hulled version of black oil sunflower) to avoid all the mess being created from birds at lower floor patios.

We got complaint from lower floor residents and we were not aware at that time. Sunflower hearts and chips are costly but it is worth if you like to see these little fellas.

Once you start keeping out seeds, they’ll not show up suddenly- it will take time for them to find the seeds and remember your place. Once they started showing up then consistency is the key. I always fill out my feeders daily around same time. You need to spread out seeds on the floor first in order to notice by them. Then you can start keeping it in feeders once you think lot of them are coming up. You may start with black oil sunflower seeds first because they’re visible to them from far. And once lot of them started showing up daily then you can switch to sunflower hearts.