Addendum to the Bird Song Key to the Birds of Pipeline Road Area, Soberanía National Park, Panama: Two Additional Wrens

In 2016, I published a bird song key to the Pipeline Road area in and adjacent to Soberanía National Park, Panama [1]. This key is, to my knowledge, the largest bird song key in the world. Since the key was published, Rufous-breasted Wren (Pheugopedius rutilus; Figure 1) and Rufous-and-white Wren (Thryophilus rufalbus; Figure 2) have moved into the area. This addendum adds three songs of Rufous-breasted Wren and three songs Rufous-and-white Wren to the key, thereby increasing the key’s song total to 327 and its species total to 218.