birding-aus

Help with night caller ID

To: Birding-Aus <>, COG list <>
Subject: Help with night caller ID
From: Robert A Gosford <>
Date: Thu, 19 Jan 2006 05:43:01 +1100
Dear all,
I'm wondering if anyone on the list might be able to assist with ID of the following call.
I live in a closed Eucalypt forest close to the coast at Vincentia on Jervis Bay, south coast of NSW. For the last few weeks I been hearing a call at night and been unable to spot the caller with a torch or against the (fairly bright though overcast this morning) night sky.
The call consists of about 8-9 closely-spaced but distinct notes and sounds like a trill or whistle. In this morning's wet forest and when the caller is some distance away it sounds quite high-pitched and almost ventriloqual - this may be through reflection off the wet leaves, though when the call is made closer there is a more distinct 'breathy-ness' and lower-range content to the call. The first note is slightly longer and lower than the following notes which do not change in pitch. I have heard the call repeated with some time between repeats or, as in this morning at 4.45am, repeated at variable times as close as a few seconds apart. The caller is highly mobile and moves quickly between trees. I have also heard the same call made elsewhere up the ridge behind or house - so the call may be a contact call, rather than say, a prey-finding echo-location call from a bat.
The caller appears to be foraging in the outer foliage of the Eucs as I can hear it crashing into foliage.
I think it is a bird, though none of the usual suspects come readily to mind - but it could be a bat or some other mammal.
Any assistance will be greatly appreciated.
Bob Gosford
Bhwerre
NSW
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