01844nas a2200109   4500008004100000245008500041210006900126520141500195100003101610700002401641856006901665       2019                        eng d00aOrnithophony in the soundscape of Anaikatty Hills, Coimbatore, Tamil Nadu, India0 aOrnithophony in the soundscape of Anaikatty Hills Coimbatore Tam3 a<p>An attempt has been made to understand the extent of ornithophony (vocalization of birds) in the soundscape of Anaikatty Hills.&nbsp; The study was limited to 13 hours of daylight from dawn to dusk (06.00&ndash;19.00 h) between January 2015 and October 2016.&nbsp; Six replicates of 5-minute bird call recordings were collected from each hour window in 24 recording spots of the study area.&nbsp; Each 5-minute recording was divided into 150 &lsquo;2-sec&rsquo; observation units for the detailed analysis of the soundscape. A total of 78 recordings amounting to 390 minutes of acoustic data allowed a preliminary analysis of the ornithophony of the area.&nbsp; A total of 62 bird species were heard vocalizing during the study period and contributed 8,629 units.&nbsp; A total of 73.75% acoustic space was occupied by birds, among which the eight dominant species alone contributed to 63.65% of ornithophony.&nbsp; The remaining 26% of acoustic space was occupied by other biophonies (12.60%), geophony (5.57%), indistinct sounds (7.66%), and anthropogenic noise (0.41%).&nbsp; Passerines dominated the vocalizations with 7,269 (84.24%) and non-passerines with 1,360 (15.76%) units.&nbsp; Birds vocalized in all 13 observation windows, with a peak in the first three hours of the day (06.00&ndash;09.00 h).&nbsp; Vocalizations of non-passerines were prominent in the dusk hours (18.00&ndash;19.00 h).</p>
1 aDivyapriya, Chandrasekaran1 aPramod, Padmanabhan  uhttps://threatenedtaxa.org/index.php/JoTT/issue/view/14471-14630