DrD,
I didn't see your post until today. I don't know why I missed it earlier.
Congratulations on your purchase of a bird feeder. Now you need to get yourself a good field guide. I recommend the Golden Guide to Field Identification of Birds of North America. There are other very good ones, maybe better than this one, but it is the one we've been using for years, and we have never failed to find any bird we've seen in it.
Once you have a field guide, then when you see a bird at your feeder that you do not know, you can look in your book and find out what it is. In this way, you will learn to recognize them whenever and wherever you happen to see them. Sometimes when I feel tired or stressed, I sit in my rocker next to the French door in our bedroom, and just watch the birds at my feeders. It's a good way to relax for awhile, and to me, a lot more interesting and enjoyable than television or other man-made amusements.
Be sure to tell us what kind of birds you are seeing at your feeder.
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The Lord is the strength of my life and my portion forever.