“You are a rare bird, easy to see but invisible just the same.” That thought is close at hand in Sparrow Envy: Field Guide to Birds and Lesser Beasts, as renowned naturalist and writer J. Drew Lanham explores his obsession with birds and all things wild in a mixture of poetry and prose. He questions vital assumptions taken for granted by so many birdwatchers: can birding be an escape if the birder is not in a safe place? Who is watching him as he watches birds?