Chip Calls is a new collection of “warbler” poems based on the following constraints: 1) acquaintance: add the bird to your “life list” before writing; 2) voice: listen to its song, translating rhythm and pitches; 3) plumage: note the bird’s color and pattern; 4) behavior: attend to habitat and details of foraging, breeding, nesting and migration; 5) range: name a far away place, since warblers link humans across hemispheres; 6) languages: include words from poets writing in the North as well as the South—warblers feed on both sides of the border; 7) nonsense: acknowledge that warblers are restless, hard to see, and give you a crick in the neck.