Here are some suggested poems and music to inspire. 

Poetry
Blue Horses by Mary Oliver
​National Geographic Book of Nature Poetry: More than 200 Poems With Photographs That Float, Zoom, and Bloom! by J. Patrick Lewis
National Geographic Book of Animal Poetry: 200 Poems with Photographs That Squeak, Soar, and Roar! by J. Patrick Lewis 
Color Me a Rhyme: Nature Poems for Young People by Jane Yolen and Jason Stemple
Red Sings from Treetops: A Year in Colors by Joyce Sidman and Pamela Zagarenski
Seeds, Bees, Butterflies, and More!: Poems for Two Voices by Carole Gerber and Eugene Yelchin 
Dark Emperor and Other Poems of the Night by Joyce Sidman and Rick Allen 
Joyful Noise: Poems for Two Voices by Paul Fleischman and Eric Beddows 

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Music
Autumn by George Winston
Native American Flutes & Sounds of Nature by Jessita Reyes