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.
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