Mean height of primary excavator nest trees or snags and nests as a function of bird length (bill to tail) in inland (●) and coastal (■) forests of the Pacific Northwest. All bird lengths from [234]. Regression lines are dotted for coastal forests and solid for inland forests. Data of [7, 8, 11, 29, 53, 55–58, 65, 69, 70, 72, 74, 75, 78–82, 84, 85, 87, 91–94, 98, 103, 108, 112, 169, 173–175, 188, 199, 238, 241, 242, 249, 312–323].