FIGURE 3 in Species limits in antbirds (Aves: Passeriformes: Thamnophilidae): an evaluation of Frederickena unduligera (Undulated Antshrike) based on vocalizations

FIGURE 3. Calls of Frederickena unduligera and F. fulva. (A) F. u. unduligera snarl. Parque Nacional de Jaú, Amazonas, Brazil (S. Borges ISL-AW.020:29). (B–D) F. u. pallida. (B) whistle. Tupana Lodge, Amazonas, Brazil (A. Whittaker ISL-AW.020:28). (C) short whistle. Igarapé Santa Maria, Amazonas, Brazil (B. Whitney ISL-BMW.184:55). (D) whistle-snarl. Tupana Lodge, Amazonas, Brazil (A. Whittaker ISL-AW.020:21). (E–H) F. u. diversa. (E) whistle. Parque Nacional da Serra do Divisor, Acre, Brazil (B. Whitney ISL-BMW. 126:07). (F) whistle-snarl. same recording. (G) snarl. same recording. (H) rattle. same location (B. Whitney ISL-BMW. 126:04). (I–K) F. fulva. (I) whistle. Kapawi Lodge, Pastaza, Peru (B. Whitney ISL-BMW.157:08). (J) whistle-snarl. same recording. (K) snarl. same location (B. Whitney ISL-BMW.153:08).