. Bulletin of the British Ornithologists' Club. Birds. Figure 3. Comparison of the territorial song of male Ural Owl Strix uralensis liturata (left column) and Sichuan Wood Owl S. u. davidi (right column), revealing the striking similarities in frequency and rhythm, but also clear differences in the structure of the first syllable (two short elements in Ural Owl and one long element in Sichuan Wood Owl) and in the duration of the pause following this. Although quite variable, the pause in Ural Owl's song lasts Z-A times longer than that in Sichuan Wood Owl. (Ural Owl recordings from captive-br
. Bulletin of the British Ornithologists' Club. Birds. Figure 3. Comparison of the territorial song of male Ural Owl Strix uralensis liturata (left column) and Sichuan Wood Owl S. u. davidi (right column), revealing the striking similarities in frequency and rhythm, but also clear differences in the structure of the first syllable (two short elements in Ural Owl and one long element in Sichuan Wood Owl) and in the duration of the pause following this. Although quite variable, the pause in Ural Owl's song lasts Z-A times longer than that in Sichuan Wood Owl. (Ural Owl recordings from captive-bred stock in Austria and Germany.) Sonograms created by Kay Electric Sonagraph; Sonagramm-Archiv der Osterr. Akademie der Wissenschaften/Vienna. Sichuan Wood Owl recordings from Lianhuashan reserve, China: a) two-syllable strophe, final syllable with three elements; b) three-syllable strophe; c) two-syllable song with two elements to final syllable; d) two-syllable song with simple elements; and e) single syllable, repeated in soft and dull series. Sonograms created using Avisoft for PC, average intensity; Helb (Univ. Kaiserslautern).. e). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Ornithologists' Club. London : The Club
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1893
