I think the count is influenced/biased by people who attract birds at
feeding tables.
If I had access to such an address in Lyons my count (done in all the
enveloping streets) would have been much higher.
Cheers,
Bruce
-----Original Message-----
From: Daniel Hoops
Sent: Tuesday, June 07, 2011 10:18 AM
To: John Leonard
Cc: Canberra Birds
Subject: second Gang-Gang census
Wow, that is very few birds. I regularly see up to five birds on campus in
the mornings, particularly near where they are fed. I'm also surprised that
none were seen in Turner, as I regularly see them in Haig Park in the
mornings on my way to ANU. Last week there were four hanging around there
together. I'm wondering what is meant by "Turner North to Barry Dr." Barry
Dr. is the southern border of Turner, below which is ANU campus. Is it
possible that two people (me and however was doing "Turner") both surveyed
the ANU campus?
Cheers,
Dan
Daniel Hoops
PhD Candidate
Research School of Biology
The Australian National University
Room 201, Building 44
Daley Road, Canberra
ACT, 0200, Australia
+61 2 61258057
On 07/06/2011, at 9:15 AM, John Leonard wrote:
The results are are as follows: between 11-12 on Sunday 5 June, 18
areas in Central Canberra were surveyed, and two casual observations
were submitted. 15 individual birds were located.
The results are summarised in the attached spreadsheet.
These results are somewhat surprising, to me at any rate, as the
weather this year was very much better than last year, and yet fewer
birds were recorded. (Last year 25 birds were observed, however the
majority of these birds were two large concentrations, 9 birds in
Commonwealth Park and 13 in a back-yard in Lyons). This year more
pairs on their own were sighted, not groups. Another difference is
that only one immature bird was seen, compared with 4 last year.
The results of the two Gang-Gang censuses lead me to the following
conclusions:
1. Gang-Gangs are conspicuous and this, coupled with the 'lumpiness'
of their distribution on occasions might cause us to overestimate
their numbers.
2. The number of Gang-Gangs in central Canberra is probably lower than
I had suspected and concentrations like the 13 from Lyons last year
(or the 17 I had in my backyard in Hughes a couple of years ago) might
represent significant proportions of the birds actually present in the
area.
3. For next year we need a methodology for counting that has a longer
period to allow more observations and for us to average out sightings
(and also perhaps gain insights into preferred feeding areas and
patterns of movement).
Thanks again to the observers. If anyone has any thoughts on any of
the above please let me know. I will be preparing a report for
Canberra Bird Notes as last year.
--
John Leonard
Canberra
Australia
www.jleonard.net
I want to be with the 99,999 other things.
<results GG Survey
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