Navigation Links
Low-pitched song indicates fairy-wren size

AUDIO: This is an example of a trill song type that tells listeners how big the singer is. Their larger physical size means that bigger male purple-crowned fairy-wrens can sing this...

Click here for more information.

A male fairy-wren's low pitch song indicates body size, a new international study has shown.

The study led by University of Melbourne researcher Dr Michelle Hall, is the first to show that the larger the male fairy wren, the lower the pitch of his song.

"This is the first time we have been able to show that song pitch indicates body size in song birds," said Dr Hall from the University's Department of Zoology.

The study, which began when Dr Hall was at the Max Planck Institute for Ornithology in Germany, has been published today in the journal PLOS ONE.

Reliable communication about body size between animals is particularly important when communicating with mates or rivals. For example the bigger the rival is, the more likely it is to win in a fight so a song pitch indicating a large size may deter rivals.

"Surprisingly, there is very little evidence that the pitch of calls indicates body size differences within species, except in frogs," she said.

"In birds in particular, there has been no evidence that the pitch of songs indicated the size of the singer until now."

The study involved measuring the leg length (a good indicator of overall body size) of 45 adult male purple-crowned fairy-wrens. It found there was a correlation between the lowest song pitches and male size.

"We found the bigger males sang certain song types at a lower pitch than smaller males," she said.

Purple-crowned fairy-wrens are creek-dwelling birds from northern Australia and, like their close relatives the blue wrens, males sing trill songs after the calls of certain predators, a context that seems to attract the attention of females.

Males have a repertoire of trill song variants, and it is the low-pitched variants that indicate the size of the singer.

Dr Hall showed that it may be the complexity of birdsong that has obscured the relationship between body size and song frequency in the past.

"Birds can have large repertoires of song types spanning a wide frequency range, and some birds even shift the pitch of their songs down in aggressive contexts," she said.

"Focusing on the lowest pitches that males were able to sing was the key to finding the correlation with body size."


Contact: Rebecca Scott
University of Melbourne

Related biology news :

1. Intensive kidney dialysis indicates better survival rates than conventional dialysis
2. Brain may see more than the eyes, study indicates
3. A digital portrait for grapes indicates their ripeness
4. Animal model of human evolution indicates thick hair mutation emerged 30,000 years ago
Post Your Comments:
Related Image:
Low-pitched song indicates fairy-wren size
(Date:4/26/2016)... LONDON , April 26, 2016 ... a product subsidiary of Infosys (NYSE: ... to integrate the Onegini mobile security platform with ... ) The integration will ... to access and transact across channels. Using this ...
(Date:4/15/2016)... April 15, 2016  A new partnership announced ... accurate underwriting decisions in a fraction of the ... priced and high-value life insurance policies to consumers ... With Force Diagnostics, rapid testing (A1C, Cotinine ... readings (blood pressure, weight, pulse, BMI, and activity ...
(Date:4/13/2016)...  IMPOWER physicians supporting Medicaid patients in ... standard in telehealth thanks to a new partnership with ... IMPOWER patients can routinely track key health measurements, such ... and, when they opt in, share them with IMPOWER ... local retail location at no cost. By leveraging this ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... , June, 23, 2016  The Biodesign Challenge ... envision new ways to harness living systems and biotechnology, ... Art (MoMA) in New York City ... 130 participating students, showcased projects at MoMA,s Celeste Bartos ... Paola Antonelli , MoMA,s senior curator of architecture and ...
(Date:6/23/2016)... ... 23, 2016 , ... STACS DNA Inc., the sample tracking software company, today ... Laboratory, has joined STACS DNA as a Field Application Specialist. , “I am ... and COO of STACS DNA. “In further expanding our capacity as a scientific integrator, ...
(Date:6/23/2016)... NEWPORT BEACH, Calif. , June 23, 2016 /PRNewswire/ ... offering new biological discoveries to the medical community, has ... and co-founder Matthew Nunez . "We ... provide us with the capital we need to meet ... funding will essentially provide us the runway to complete ...
(Date:6/23/2016)... ... June 23, 2016 , ... ClinCapture, the only ... Center and will showcase its product’s latest features from June 26 to June ... scientific poster on Disrupting Clinical Trials in The Cloud during the conference. ...
Breaking Biology Technology: