PhD Theses (SACON)
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Item Acoustic communication of passerine birds of Anaikatty hills with special emphasis on Common Iora Aegithina tiphia(SACON, 2019) Divyapriya, C; Pramod, PBird acoustic communication is intended for species identification between groups (interspecific communication) and for individual identity within a group (intraspecific communication (Simmons, 2002). Bird vocal signals comprise a mixture of tones (harmonic sounds) such as chirps, clicks, less harmonic mumbles, wheezy chats, rattles and buzzy noises. Male birds use complex songs for territorial establishment and maintenance (Catchpole & Slater, 2008; Bhatt et al., 2000; Marler, 2004); and mate attraction (Marler, 2004). Songs have various other functions, for; (i) distracting potential predators (Ritchison, 1991); (ii) informing the mates about the threat (Kermott, & Johnson, 1991); and (iii) coordinating nest exchanges between mates