One answer to Geoffrey's question 'What is a lot?' comes from the
ABR data on Cattle Egrets in COG's area of interest:
- the 10 year average to 30 Jun 2013 was 7.2, and the 30 year
average 6.9
- last year, ie the year to 30 Jun 2014, altho the mean number
reported was 13.8, the median was just 5.0, with the distribution
being skewed by multiple records of the large flock at Jerra in
April 2014, max 101 on 16 April as Chris Davey mentioned.
Regards - David
On 1/05/2015 8:00 AM, Geoffrey Dabb
wrote:
What
is a lot? It was only a year ago we had more than 100 at
one time at Jerra Wetlands, over several weeks
From: Harvey Perkins [m("gmail.com","hdpphd");">]
Sent: Thursday, 30 April 2015 7:27 PM
To: David McDonald (personal); Canberra Birds
Subject: Re: [canberrabirds] Cattle Egrets at
Bungendore
I saw a tight flock of 13 fly up the
Murrumbidgee valley corridor to the west of us
(Gleneagles/Murrumbidgee golf course) before veering left
and flying right over our house, back on 9 April.
I knew 13 was a lot for the situation
(and for my GBS site!) but hadn't realised it applied to
the ACT region generally. I've only once previously
recorded the species from here (a single bird), on 6 March
2014.
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