On this installment of ST, we welcome Julie Watson and Mike Koster, the co-directors of Tulsa Roots Music, a nonprofit and ongoing (and quite wonderful) concert series that first got underway here in our community about four years ago. On Saturday the 18th, the day-long Tulsa Roots Music Bash will be presented, for the second consecutive year, at the Guthrie Green in downtown Tulsa. It's a free-to-the-public festival, running from about 2:30pm till 9:30pm, and it features an impressive array of bands and musicians from all over the globe (not to mention belly dancers, circus artists, and other enticing curios). Standout acts for this year's Bash include Los Lonely Boys, The English Beat, Rocky Dawuni, and Joe Driscoll & Sekou Kouyate -- and Julie and Mike highlight the sounds and influences of these respective groups while also speaking more generally about the kinds of musical performers they like to book for their shows (and why). They also tells us about how Tulsa Roots Music first got started, and moreover they describe their "Sundays in September" series, which is presented at the Guthrie Green each autumn. Also on our program, StudioTulsa commentator -- and avid birder -- Janet Pearson has some great stories and stats to share regarding the bird migration route known at the Central Flyway.