Warbler Guy, where do I learn about "reading" warbler songs (sonograms or spectrograms)? Is Warbler song easy to "read?"

Kathy, there's a one-stop shopping venue for all your edification needs: earbirding.com

Here, Nathan Pieplow, an erudite sound recordist and expert birder, highlights many "ear birding"
elements, including ways for you to easily read sonograms/spectrograms.

This site is so good that it gets a top rating from Warbler Guy's advisory panel: me, myself, and I.

Seriously, reading and interpreting sonograms/spectrograms takes practice, but after a while you can
see the elements upon the page that originally looked like gibberish make sense.

Ergo, you'll quickly have no problems identifying a song sparrow classic song via its sonogram in comparison to a common yellowthroat's, and so on.

Other resources for identifying birds by sound and "ear birding" abound.....Some of my favorite are books by Dr. Donald Kroodsma, who authored the classic:
The Singing Life Of Birds.