Friday, December 7, 2012

2 Articles published in Canberra Bird Notes

The following two short articles relating to birds in (inter alia) the Carwoola area were published in Canberra Bird Notes December 2012.

An “outbreak” of Banded Lapwings on (and near) the Hoskinstown Plain

The species account for Banded Lapwing Vanellus tricolor in “Birds of the ACT: Two Centuries of change” (Wilson 1999) concludes “There have been no recent sightings.  The species is presumed to be extinct in the ACT.”  This is, as would be expected, consistent with the views expressed in the ACT Bird Atlas (Taylor and COG 1992) reporting a few records in the ACT scattered through the 1980s.  More recently Boekl has reported (Boekl 2010) on the reappearance of the species in Throsby, and in 2012 a pair were observed on the Canberra airport.
The locations referred to in this note are shown in this snip from Google Earth.  From Lake Bathurst to Plains Rd is approximately 43km in a straight line while Lake Bathurst- Throsby is 50km.
In the wider COG Area Of Interest (AOI), sightings have been made in the Lake Bathurst/Morass area of NSW most years since 1981, mainly through the Waterbird Surveys.  Recent sightings have included 158 birds in January 2012 (the highest number ever recorded in the Water Bird Surveys) and 84 birds in September 2012.   As Lake George has rehydrated since 2010 there have been a few reports from that area including 37 birds in October 2010 (M Lenz pers comm). 

Against that background I was surprised to find that the Atlas of Living Australia contained a record for Banded Lapwing from the Hoskinstown Plain.  Other than noting that the coordinates for the record gave a position close to the Molonglo River I have not been able to gain further information about the circumstances of the observation.   This led me to wonder if this was a case of mistaken identity of Masked Lapwing Vanellus miles, commonly seen in the area.

Following the appearance of the birds at Canberra airport mentioned above I advised several residents of the Carwoola area that there was a prospect of the Banded Lapwing being observed in suitable habitat in the area.  In response to that, on 7 October 2012 a local landowner (not a member of COG) advised that he had seen 5 Banded Lapwings in a recently sown paddock on the Hoskinstown Plain.  When I visited the area the next day 25 Banded Lapwings were observed in a paddock on which forage brassica was germinating. 

The landowner monitored the birds closely and on occasions when I visited the area COG data sheets were lodged.  These summarise the presence of the species in the location, with the highest number of birds recorded (on 7 November 2012) standing at the time of writing at 46.  It is possible that this is an undercount since by that time the crop had grown somewhat and the Lapwings disappeared from view when they sat or walked through a particularly tall section of crop.

I was advised by email (D Wilson pers comm) that on 19 October 2012 at least 6 Banded Lapwings had been seen beside the Kings Highway in a ploughed paddock.  This is approximately 15km from the site on Hoskinstown Plain.  Wilson also advised that Banded Lapwings were common in that area 50 years ago when passing through with his father while returning from banding expeditions on Lake Rd Bungendore.   
On 24 October I saw 7 Banded Lapwings in that location.  In response to this sighting David McDonald visited the site a little later in that day and recorded  12 Banded Lapwings (D McDonald pers comm).  On my way home from blitzing on 27 October I also recorded at least 12 Banded Lapwings in the same paddock.  On 28 October  passing by at 6am – in rather cool weather - I could only identify 6 birds of this species, clustered around the edge of the paddock as though they had sheltered in the rank grass overnight.  On 5 November I passed the site at 1330 and observed 4 Banded Lapwings in two pairs, one at each end of the paddock.  Some of the crop was growing  well, making it difficult to spot the birds.

In summary it would appear that the Banded Lapwing is regaining its former territory.  Whether this reflects changes in the weather; changes in land management in the area; or simply chance is a topic for speculation.  However the species is known to be nomadic and the recent resurgence in the AOI may be a reflection of seasons which suit the requirements of the species.
References
Boekl C, 2010. “Status of the Banded Lapwing Vanellus tricolor in the
Australian Capital Territory”, Canberra Bird Notes v35 (3) pp192-196

Taylor M and COG, 1992, “Birds of the Australian Capital Territory: An Atlas”
Wilson S, 1999, “Birds of the ACT Two Centuries of Change”

Chestnut-rumped Heathwren (Calamanthus pyrrhopygia) breeding in Yanuununbeyan State Conservation area.

On 3 November 20012 a COG Field Trip visited Yanununbeyan State Conservation Area.  The first walk undertaken was towards Corner Hill.  We entered some eucalypt  woodland (mainly Eucalyptus rossii and E. macrorhyncha with an understorey dominated by Joycea  pallida.)

At one point I stepped off the track to inspect an orchid (Diuris sulphurea) and flushed a small darkish brown bird with a bright chestnut rump.  It flew quite swiftly about 20m and dived to the ground.  The 9 members of the group spent some time getting occasional glimpses of the bird but none clear enough to identify it.
In view of the colour of the rump my first thought was Chestnut‑rumped Heathwren (Calamanthus pyrrhophagia) which was supported by the bird’s tendency to cock its tail vertically.  However the image of the species shown in a field guide[1] and a smartphone application showed a white breast with dark streaking.  The bird seen had a brown breast.  As alternatives we considered (1) White-browed Scrubwren (Sericornis frontalis) and (2) Pilotbird (Pycnoptilus floccosus). However, based on plumage features, size or habitat those species did not match the bird under observation.

Attempts were made to photograph the bird, but the best result was of the log on which it had been perching!  We moved on, returning to the area after about 10 minutes. 

On this occasion a member of the group saw the bird in question fly into a jumble of vegetation under a fallen log and noticed ‘baby bird noises’ coming from the site.  We spread out a little so as not to stress a breeding bird and the bird soon re-appeared.   On this occasion I got a reasonable look for about 2 seconds noting: the bright chestnut colouring extending under the rump; a faint ‘off-white’ eyebrow;  some white on the tail; and faint, but clear, darker streaking on the brown breast.

On returning home and consulting HANZAB v6 it was clear that the bird was very similar to the illustration of a female Chestnut-rumped Heathwren.  The breast colour was possibly a little browner – more like the illustrated juvenile – perhaps indicating a young bird.  The location of the nest (inferred from the calls when the bird entered, and the repeated visits to, the location) was typical of the sites described in HANZAB.
While the adult bird was not heard to sing, which was unlike previous experience with this species at Pierces Creek, the description of Voice in HANZAB suggests that singing is more common earlier in the year.  The calls by the young as the adult approached the nest was as described in HANZAB.

I have concluded this was a record of a Chestnut-rumped Heathwren and that a nest with young (NY) was present.  This is the third breeding record for the species in the COG AOI and the first non-DY breeding record.

Reference
Higgins P. J. and J. M. Peter (Eds) 2002 “Handbook of Australian, New Zealand and Antarctic Birds, volume 6” 


[1] Subsequently found to apply to a number of field guides so this one is not singled out and named.

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