Rufous Songlark downtime on a warm day - film

[Philip Veerman <>]

What a curious question. I would not think it would be either breaths in and out and/or the heart beat. Yes birds heart rate and breath is faster than us but these ripples are surely too big for that (and birds breathing system is completely different from mammals - like us). I wonder if it is an artefact of the speed at which the camera takes pictures, relative to the movement of the water. Because the water movement is jerky. Just as for example, often film of a moving propeller blade in an aircraft or helicopter will appear (although out of focus) to show the blade turning very slowly or going backyards.

 

Philip

 

From: David Rees [
Sent: Thursday, 19 January, 2017 2:43 PM
To: Con Boekel
Cc: <>
Subject: Re: [canberrabirds] Rufous Songlark downtime on a warm day - film

 

Con

 

Unless its doing 'fancy footwork', which I doubt, it could be either. the still and shallow water may make the effect noticeable as the bird is quite delicate about its actions, unlike say Crimson Rosellas, which go for a wash with gusto.

 

David

 

On Thu, Jan 19, 2017 at 2:31 PM, Con Boekel <> wrote:

David

The ripples are interesting. They appear to be being generated far more rapidly than the bird's body is moving. Are the ripples caused by breaths in and out and/or the heart beat?

regards

Con


On 1/19/2017 1:07 PM, David Rees wrote:

Usually manic bird having a bath on warm day https://vimeo.com/200107405

David

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