Editor’s Note: There's a lot to look forward to in spring, including the welcomed hullabaloo of birdsong. The sheer volume of songs and calls can often feel overwhelming for birders, but these sounds offer both an opportunity and a challenge. Follow along with our birding-by-ear series to learn how to better ID birds through their vocalizations. In part 2, Bird and Moon creator Rosemary Mosco takes you through the various sounds you hear and what they mean to birds (and to birders). To catch up, check out part 1, part 3, part 4, part 5, part 6, part 7, and part 8. * * * Spring’s here, and there’s a birdy party raging outdoors. It's loud, it's raucous, and for the untrained ear, it's often incoherent. But don't fret. With a little practice, you can begin decoding all those songs and calls, which will in turn give you remarkable insights into the species around you. Honing your birding ear can also reveal hidden details in the field. For...