The din of bird song at dawn and dusk is remarkable at this time in June. Familiar Carolina Wrens, Black-capped Chickadees and American Robins have already fledged one batch of young and are close to bringing off a second brood. Most single clutch birds found here are now busy feeding young. It is a moment of heightened bird activity. Vern Laux has details in this week's Bird Report, audio posted above.