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. 2016 Jan 26;11(1):e0146790. doi: 10.1371/journal.pone.0146790

Table 2. List of species introduced to the secondary dataset and their song characteristics.

Common name Scientific name Observed frequency range (Hz) Song structure
North Island robin Petroica longipes 1,700–12,500 Males sing loud songs that have series of phrases. Phrases have variety of simple notes.
Tui Prosthemadera novaeseelandiae 400–18,000 Loud and complex songs: mix of melodious notes with coughs, grunts and wheezes.
North Island kaka Nestor meridionalis 700–15,000 Harsh and grating sound, variety of musical whistles.
Hihi Notiomystis cincta 1,000–21,000 Variety of 2–3 note whistles. Quiet or aggressive warbles.
North Island saddleback Philesturnus rufusater 800–22,000 Very active and noisy. Loud chattering calls and variety of rhythmical songs.
Marsh wren Cistothorus palustris 500–15,000 Gurgling and rattling trill.
Western meadowlark Sturnella neglecta 650–12,500 Male sings a complex, two-phrase song, begins with 1–6 pure whistles then a series of 1–5 gurgling warbles.
Horned Lark Eremophila alpestris 1,100–18,000 Musical songs: fast, high-pitched sequence of sharp, tinkling notes.