Ya know they did "Dazed and Confused"YES!
I recorded a YB concert off the radio when I was a kid - the song was called "Smokestack Lightning" in those days, and had a bluesy feel, not the psychedelic groove of the Zep version.
Page also played "White Summer", which later became "Black Mountain Side".
You can get the Yardbird's/Page's version "Dazed and Confused" at Kazaa Lite. Yardbirds were one of my favorite bands and dittos for The Animals.
"Smokestack Lightning" .... a Yardbirds song for years. An old blues song by Howling Wolf? Clapton played it on "Five Live Yardbirds"