{"data":[{"source":"bio.acousti.ca","id":"57535","topic":"behaviour","value":"The call of P. graminea consists a series of echemes made up of two closely spaced syllables pro- duced every 3\u20135 s; mean syllable duration is 0.048 s (SD=0.0040, n=20); the peak frequency of the call is 9.9\u201311.7 kHz (Figs. 53G\u2013I). The call is audible from a distance of a few meters.","topic_link":"http:\/\/rs.tdwg.org\/ontology\/voc\/SPMInfoItems#Behaviour","info_url":"https:\/\/bio.acousti.ca\/node\/57535"}]}