As a believer in evolution as a relentless shaper of behaviour, I have no
doubt there is a purpose, probably several purposes. The 'call' is probably
to enable moving feeders to maintain contact and stay together as a flock,
possibly warn of predators. The 'song' function is usually associated with
attracting a mate or proclaiming territory. To determine a main (or
'specific') purpose you would need to go species by species, season by
season.
-----Original Message-----
From: Philip Veerman
Sent: Monday, 29 July 2013 6:49 PM
To: 'Johnebuckley';
Subject: Pardalotes behaviour
That appears to be suggesting that there is no specific purpose. Hard to
know if that thought is true. There are many possible purposes. Or the bird
may simply only respond as it feels at that moment and may not have the
capacity to remember that it was making the same noise 5 minutes ago. Or the
next time might give the result it wants. Beyond that, there are some good
new books on bird song you may like to consult.
Philip
-----Original Message-----From: Johnebuckley
Sent: Monday, 29 July 2013 5:26 PM To:
Subject: Pardalotes behaviour
Is there any accepted theory as to why some birds such as pardalotes call
continuously over a long period? It would seen that such behaviour would be
a significant waste of energy, if there is no specific purpose. John
Sent from my iPad
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