Following the small but mighty Baby Eagle is sort of like watching an amorphous shadow of a band. Except when performing as the formally recognized Baby Eagle and the Proud Mothers, the only real Baby Eagle consistency is the man to which that shadow belongs, former Constantines member Steve Lambke. In that tradition, Lambke kicked things off on April 6 by diving into his Jimmy Jazz opening slot alone, then calling You’ve Changed Records labelmates Daniel Romano (Attack in Black) and Jim Kilpatrick (Shotgun Jimmie) to the stage to join on lead guitar and drums (respectively). That presence eventually swelled to include Legato Vipers members Mike Brooks on a third guitar and Tyler Belluz on bass. Exhibiting impressive coherence for an act lending itself to such a diverse lineup, it was an act in collaboration that suggesting although Baby Eagle has no concrete performance to tour around with, he doesn’t need his Proud Mothers to carry him along the way.