Once you learn two or three by ear, you can learn how to identify unique patterns and mnemonics to learn even more!
At the CASEE center, 11104 NE 149th St., Brush Prairie, WA.
Fees: free for Naturescaping members or $15 for non- members. Membership per year is $20 ($15 for seniors). Monthly classes throughout the year. What a deal!
For more info: http://naturescaping.org/classes.php