To: "Scott O'Keeffe" <>
Subject: 1080
From: Peter Woodall <>
Date: Fri, 17 Aug 2001 13:31:43 +1000
At 12:39 17/08/2001 +1000, you wrote:
>Good evening, LK.
>Your observations of turkey mounds and young do not translate into an
>absence of predation. I quote from a study by Jones and Everding:  "the
>large number of mounds (in some suburban areas)does not necessarily
>correlate with large numbers of recruits".  They go on to state that
>hatching success from suburban mounds is lower than in wild mounds, and that
>mortality of hatchlings is high.  Eggs and hatchlings are probably more
>vulnerable to predation than adults.  Thus, if adults live for many years,
>it may appear as if the birds are "holding their own".  If eggs are not
>hatching, or if there is little recruitment of new birds because young are
>taken before they mature, older birds may persist for years, then suddenly,
>populations may disappear as old birds die.  The study lists a number of
>populations in urbanised areas of Brisbane that have disappeared

Hi everyone

I'll wade into this with my subjective observations from Moorooka, backing
on to Toohey Forest (Toohey "Mountain" side).

1. Toohey is an isolated patch of forest, surrounded by suburbia.  
There is unlikely to be immigration from BFP. We have kept records at our house
for 15 years, no turkeys in the first 10 or so, now quite common. We suspect
they have come in from "dumped" birds.

2. We have a mound in our garden which has regularly produced 3-4 +?? young
a year,
its very hard to be sure because they are quite cryptic. We do see immature
birds around after the breeding season.  There are other mounds up the valley.

3. I couldn't start to estimate mortality but predation is NOT the only factor.
I think the limits of food resources in suburban gardens may often be reached.
Last year in the dry spell the birds were VERY hungry, digging out all manner
of my plants, It hasn't been as bad this year. 

The real effects of both predation and limiting reources are very hard to
 I think that its easy just to put the blame on obvious and visible potential 
predators like the cats and dogs (and the much less visible foxes) but what role
does lack of food play?  I think that there is just speculation, no hard
facts on this.

4. There is no doubt numbers in our valley have increased over the past 5 years,
recruitment or release (who knows) but they seem to be holding their own against
cats, dogs and foxes.



Dr Peter Woodall                          email = 
Division of Vet Pathology & Anatomy             
School of Veterinary Science.             Phone = +61 7 3365 2300
The University of Queensland              Fax   = +61 7 3365 1355
Brisbane, Qld, Australia 4072             WWW  =
"hamba phezulu" (= "go higher" in isiZulu)


Birding-Aus is on the Web at
To unsubscribe from this mailing list, send the message
"unsubscribe birding-aus" (no quotes, no Subject line)

<Prev in Thread] Current Thread [Next in Thread>
  • 1080, Chris
    • Fox numbers., Jon Wren
    • 1080, Laurie & Leanne Knight
      • 1080, Scott O'Keeffe
        • 1080, Laurie & Leanne Knight
          • 1080, Scott O'Keeffe
            • 1080, Laurie & Leanne Knight
              • 1080, Scott O'Keeffe
              • 1080, Laurie & Leanne Knight
              • 1080, Scott O'Keeffe
    • 1080, Peter Woodall <=
      • 1080, Scott O'Keeffe

The University of NSW School of Computer and Engineering takes no responsibility for the contents of this archive. It is purely a compilation of material sent by many people to the birding-aus mailing list. It has not been checked for accuracy nor its content verified in any way. If you wish to get material removed from the archive or have other queries about the archive e-mail Andrew Taylor at this address: andrewt@cse.unsw.EDU.AU