{"data":[{"source":"bio.acousti.ca","id":"57525","topic":"behaviour","value":"The stationary call of D. cervina is acoustically identical to the one produced while flying and consists of a long, uninterrupted series of syllables produced every 0.9\u20132.0 s; mean syllable duration is 0.26 s (SD=0.0342, n=25); the peak frequency of the call is 5.9\u20136.4 kHz, with a strong harmonic at 11.7\u201312.3 kHz (Figs. 54D\u2013F). The call is very loud and audible from a distance of at least 100 m.","topic_link":"http:\/\/rs.tdwg.org\/ontology\/voc\/SPMInfoItems#Behaviour","info_url":"https:\/\/bio.acousti.ca\/node\/57525"}]}