Up until now, I had only heard them. This is the best way to encounter them for the first time each spring. To have both sound and sight all at once is not as good as hearing their song alone to start. The anticipation builds. You know you'll see them soon but you wait for their appearance.
Today, I saw two; two fat robins hopped about on my front lawn. I was fast enough with the camera this morning to catch one through my lens.