Much of Arlene Sierra's compositional output centers on the natural world, addressing the subjects of landscape, evolutionary biology, and the sounds, processes and behavior of birds and insects. Arranged into three books, Sierra's Birds and Insects comprises 15 movements composed across a twenty-year period. The three books are performed brilliantly here by pianists Steven Beck (Books 1 and 2) and Sarah Cahill (Book 3). The album is the fourth in Bridge's ongoing Arlene Sierra series.