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Re: Vocalization intensity and species density

Subject: Re: Vocalization intensity and species density
From: Vicki Powys <>
Date: Sun, 21 Apr 2002 10:47:03 +1000
Australia's Superb Lyrebird sings much less, or even not at all, in areas of
marginal habitat.  There is less food for them to eat, and they spend much
more time foraging.  Male lyrebirds that sing a lot are saying "there's
plenty of food here and I've got time and energy to sing for hours - come
and mate with me".

Vicki Powys

on 20/4/02 1:02 AM, Doug Von Gausig at  wrote:

> At 08:04 PM 4/18/2002, Mark Oberle wrote:
>> Although it might make sense, I could only find a few papers arguing that
>> at low densities, such as at the edge  of their range, species might tend
>> to vocalize less than at higher population densities, with a lot of singing
>> rivals nearby. Does anyone have any similar or counter impressions?
> My observation is that most Passerines are stimulated to sing by other
> birds singing near them. Not just by their own species, either . In fact
> they are often stimulated to sing by almost any other sound - which is why
> so many good recordings are made just as airplanes fly by!
> Doug
> Doug Von Gausig
> Clarkdale, Arizona, USA
> Moderator
> Nature Recordists e-mail group


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