{"data":[{"source":"bio.acousti.ca","id":"57474","topic":"behaviour","value":"Males of Z. ophthalmicus call from high in the trees, usually at least 5 m above the ground, and are difficult to spot. Their call is a bell-like, nearly pure-tone series of short, 0.18\u20130.28 s echemes, each consisting of 4\u20136 syllables; mean syllable duration is 0.02798 s (SD=0.00454, n=52); the peak frequency of the call is 6.4\u20138.3 kHz (Figs. 57D\u2013F). The call is easily audible to the human ear from at least 50 meters away.","topic_link":"http:\/\/rs.tdwg.org\/ontology\/voc\/SPMInfoItems#Behaviour","info_url":"https:\/\/bio.acousti.ca\/node\/57474"}]}