Perhaps not, but it would be biologically expensive to have all of that energy dedicated to high frequency vocalizations and not be able to hear it. We could infer that they do use these sounds for something which involves their being able to hear them - but at the moment it may not be indisputably proven.
Michael Stocker -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Martin Braun Sent: Tuesday, March 25, 2008 12:14 PM To: [email protected] Subject: Re: Songbird audiograms Dear friends, it is not possible to infer from the sound spectrum of the calls of a species anything about the hearing range of this species. Martin --------------------------------------------------------------------- Martin Braun Neuroscience of Music S-671 95 Klässbol Sweden web site: http://w1.570.telia.com/~u57011259/index.htm ----- Original Message ----- From: "César Sánchez" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Tuesday, March 25, 2008 4:59 PM Subject: Re: Songbird audiograms Hello Ron, Bioacusticians A large number of bird species especially hummingbirds have very high frequencies, reaching up to 17-19 kHz. Other examples which I studied are some finches in the genus Haplospiza and Acanthidops whose higher frequencies are almost 13 kHz. If you want a copy of this paper let me know Saludos CS César Sánchez M. Escuela de Biología Universidad de Costa Rica Ciudad Universitaria San José. Costa Rica. e-mail: [EMAIL PROTECTED] No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.21.8/1340 - Release Date: 3/23/2008 6:50 PM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.21.8/1340 - Release Date: 3/23/2008 6:50 PM
