Hiss later testified to the same incident, causing many members to become convinced of the pair's acquaintance. Sings a loud, piercing series of 6â10 high-pitched "tsweet" notes. The following breeding characteristics were investigated in this study: (1) timing of first and second nesting; (2) Its main wintering grounds extend from Honduras to Columbia and Venezuela.  The prothonotary warbler is now the only species placed in the genus Protonotaria that was introduced in 1858 by the American naturalist Spencer Baird. document.write("