canberrabirds

Woodswallows at New Line Paddock

To: "Martin Butterfield" <>
Subject: Woodswallows at New Line Paddock
From: "Jack & Andrea Holland" <>
Date: Mon, 11 Nov 2013 06:59:49 +1100
Martin, I think the higher than expected breeding reporting rate results from when the do come and stay around for any time, such as this year, they will attempt to breed.  Due to their habit of doing this in loose flocks, with some speed and using almost any site, breeding is relatively easy to detect than for other species.  I should add that it’s not always successful, often they abandon when conditions change, as they may do this time given the significant rain (and cold) over the past 24 hours.
 
This at least is my experience since I first saw them doing this in the Tharwa area round about 1980 during the RAOU atlas.
 
Jack Holland
 
From:
Sent: Sunday, November 10, 2013 9:03 PM
To:
Cc:
Subject: Re: [canberrabirds] Woodswallows at New Line Paddock
 
Thanks Steve.  I find the breeding reporting rate to be higher than I would have expected in my experience. That is coloured by the GBS data (which doesn't really cover Woodswallow breeding habitat to any large extent ) and reports to the chatline which may not all get followed up with record sheets especially if breeding is not involved.
 
It is always good when facts correct gut feelings!
 
Martin


On 10 November 2013 20:22, Wallaces <> wrote:

See last two columns. However, records which are classified as breeding, without any indication if it was a nest or not, have been excluded so the last two columns are probably an underestimate. Also, the data is for the whole of the COG dataset which includes the Garden Bird Survey.

 

Steve

Number of sighting only records

Number of breeding records

Total number of records

Percent breeding records

Number of years with records

Number of years with breeding records

Breeding records as percent of years with records

Number of nest breeding records

Nest breeding records as percent of records

Species

 

 

 

 

Dusky Woodswallow

5336

629

5965

10.5%

32

31

96.9%

314

5.3%

Masked Woodswallow

140

3

143

2.1%

22

3

13.6%

2

1.4%

White-browed Woodswallow

414

89

503

17.7%

28

13

46.4%

52

10.3%

 

 

From: Martin Butterfield [
Sent: Sunday, 10 November 2013 5:11 PM
To: Wallaces
Cc: COG List


Subject: Re: [canberrabirds] Woodswallows at New Line Paddock

 

Steve

 

Can you separate the breeding records into the nest found records (combination of ON, NE, NY) and others?  The proportion of breeding records seems notably higher than average for these species.

 

Martin

 

On 10 November 2013 17:04, Wallaces <> wrote:

Some information on woodswallow breeding from the COG database.

 

Steve

 

Number of sighting only records

Number of breeding records

Total number of records

Percent breeding records

Number of years with records

Number of years with breeding records

Number of years with breeding records as percent of years with records

Species

 

 

 

 

Dusky Woodswallow

5336

629

5965

11%

32

31

97%

Masked Woodswallow

140

3

143

2%

22

3

14%

White-browed Woodswallow

414

89

503

18%

28

13

46%

 

 

 

 



 

--
Martin Butterfield



 
--
Martin Butterfield
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