Yes it is very impressive. Presumably the movement of the feet is so fast
that the new hold is made before they have fallen enough, although I would
think that would involve extension and retraction of the legs at each hop
but that should show as a bobbing movement under a branch but I have not had
that impression. But Con what is your "evidence, but not conclusive
evidence"?
Philip
-----Original Message-----From: Mark Clayton
Sent: Sunday, 8 June 2014 3:24 PM
To: 'Con Boekel'; 'COG list' Subject: RE: [canberrabirds] White-throated
Treecreepers in the ascendancy
G'day Con,
I think just about every treecreeper species I have watched moves with both
legs together, not one at a time. I have also watched White-throated
Treecreepers moving along the underside of a branch where they move the same
way but don't open their wings. I have no idea as to how they stay upside
down without "dropping" as they move.
Cheers,
Mark
-----Original Message-----From: Con Boekel Sent:
Sunday, 8 June 2014 2:52 PM
To: COG list Subject: [canberrabirds] White-throated Treecreepers in the
ascendancy
I have some evidence, but not conclusive evidence, in relation to the
following question:
'Do treecreepers hop up trees using two legs at a time, or do they step up
trees using one leg at a time?'
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