Tag Archives: Masked Lapwing

Beginners Outing to Lysterfield Lake

23 July 2017
Leader: Robert Grosvenor; Species Count: 45
Golden Whistler (M), Lysterfield Lake
Golden Whistler, male. Photograph by Eleanor Dilley

Twenty eight hardy birders braved the very strong and cold wind to attend the beginners outing at Lysterfield Lake.

Magpie-lark (M), Lysterfield Lake - Dilley
Magpie-lark, male. Photograph by Eleonor Dilley

While waiting for all attendees ,Crimson and Eastern Rosellas, Purple Swamp Hen, Magpie-lark and Rainbow Lorikeets were viewed in the carpark. A Masked Lapwing was spotted closer to the Lake’s edge.

Masked Lapwing Lysterfield 2017 07 22 1588 800x944 M Serong
Masked Lapwing. Photograph by Merrilyn Serong

On the reccie more Kangaroos were seen than birds and it looked like this outing would be more of the same as the first twenty minutes went by before we sighted our first bird – a Brown Thornbill, quickly followed by a White-eared Honeyeater.

Eastern Grey Kangaroo joey Lysterfield 2017 07 22 1468 800x1067 M Serong
Eastern Grey joey. Photograph by Merrilyn Serong

There were long periods of inactivity until we would come upon a small hot spot. The first of which produced excellent sightings of Grey Shrike-thrush, Grey Fantail, both male and female Golden Whistlers and the two birds of the walk, a male Rose Robin and a Brush Bronzewing.

Unfortunately not all the beginners were able to see both. The Rose Robin surprised everyone when it appeared in a tree at eye level not more than two metres in front of us but did not stay for long. Still, many of the group got their first look at this beautiful bird. The Bronzewing skulked in the undergrowth, making sighting difficult before it was disturbed and flew off.

Little Pied Cormorant Lysterfield 2017 07 22 1513 800x836 M Serong
Little Pied Cormorant. Photograph by Merrilyn Serong

The strong wind was keeping the small birds hidden but in a more protected spot we found Superb Fairy-wren, Silvereye and Spotted Pardalote.

Venturing down to the edge of the lake enabled us to see Musk Duck, Hoary-headed Grebe, Hardhead and Coot all on the water, before returning to the main track.

Little Black Cormorant Lysterfield 2017 07 22 1516 800x704 M Serong
Little Black Cormorant. Photograph by Merrilyn Serong

Again there was a long period of inactivity with only a Grey Butcherbird heard and a Little Raven overhead. We were now back at the lake wall where Little Pied and Little Black Cormorants, Australasian Grebe and Dusky Moorhen were seen.

With the wind howling across the lake we were all glad to break for lunch and find an area out of the wind to partake of some refreshments.

After lunch we walked to the eastern end of the carpark and a short distance along the Logan track. In the more open fields we saw Straw-necked  and White Ibis, Wood Duck, Cattle Egret and in the distance a few Red-rumped Parrots.

Common Bronzewing (F), Lysterfield Lake
Common Bronzewing. Photograph by Eleanor Dilley

Returning to the carpark we had excellent views of another Brush Bronzewing together with a number of common Bronzewings.

Brush Bronzewing (M), Lysterfield Lake
Brush Bronzewing. Photograph by Eleanor Dilley

Overall 45 species were seen for the day which, considering the wintery conditions, was noteworthy.

See the complete bird list for the outing: BM July 2017 Bird List Lysterfield Lake

 

 

 

Beginners Outing to The Briars

28 May 2016
Leaders: Hazel and Alan Veevers
Species count: 50

Thirty-three members gathered at the Visitor Centre in overcast conditions and entered the wildlife enclosure where a female Golden Whistler, a Grey Fantail and Brown Thornbills were seen just inside the gate. From the bird hides several species were recorded, including Hoary-headed Grebe, Black Swan and White-faced Heron. An Eastern Grey Kangaroo and a Swamp Wallaby added to the interest as the members began the walk up towards the Wetlands Lookout.

Swamp Wallaby AV Briars 2016
Swamp Wallaby. Photo by Alan Veevers.

Swamp Gums were flowering alongside the track which attracted several species of Honeyeater, including Yellow-faced, White-eared and New Holland, as well as Red and Little Wattlebirds. Unfortunately rain started to fall heavily as the group followed the Woodland Walk. Few birds were seen until a lone (captive) Emu was spotted as we approached the gate leading back to the car park.

Emu AV Briars 2016
Emu. Photo by Alan Veevers.

 

An early lunch was taken under the veranda outside the Visitor Centre, during which the rain-clouds cleared, giving way to some welcome sunshine. Noisy Miners were evidently very interested in our food but a pair of Masked Lapwings took no notice whatsoever and continued their foraging in the adjacent paddock.

Noisy Miner The Briars 2016 05 28 0482 800 M Serong
Noisy Miner. Photo by Merrilyn Serong.
Masked Lapwing The Briars 2016 05 28 0556 800 M Serong
Masked Lapwing. Photo by Merrilyn Serong.

Afterwards, the group walked up towards the old homestead where several Parrot species were observed at close quarters. Eastern Rosellas and Rainbow Lorikeets were the most colourful, enhanced by the bright sunlight. Walking along the Farmland Track members were entertained by two litters of young free-range piglets which came rushing up to the fence. Shortly afterwards a Black-shouldered Kite was seen perched on a nearby dead tree, enabling everyone to get a good look.

Rainbow Lorikeet The Briars 2016 05 28 0420 800 M Serong
Rainbow Lorikeet. Photo by Merrilyn Serong.

After returning to the car park another track was taken alongside Balcombe Creek, where a pair of Eastern Yellow Robins provided members with a great view as they repeatedly darted from the shrubs to the path for food. A Grey Shrike-thrush, a Common Bronzewing and Numerous Superb Fairy-wrens were amongst other birds seen on this final walk.

Pig The Briars 2016 05 28 0461 800x600 M Serong
Free range piglet. Photo by Merrilyn Serong.

The day’s tally was a creditable 50 species (not counting the Emu), which was felt to be very good for an excursion at this time of year in less than perfect weather conditions.

View the bird list for the outing: BM May 2016 Bird List The Briars

 

Weekdays outing to Reef Island

2 March 2016
Reef Island beyond the swans
Reef Island beyond the swans. Photograph by Diane Tweeddale

The forecast of a day of 30o did not deter 23 bird watchers from meeting. Our leader was Bill Ramsay whose timing ensured that a falling tide allowed us to walk out along the causeway to the island almost dry shod. The car park sounded with calls of wattlebird and raven while Black Swans paddled by in small groups, apparently unfazed by the early morning salt water exercising of horses from the near horse farms. The beach north of the car park was noteworthy for the crowd of about 100 Masked Lapwings which vastly outnumbered the few Silver Gulls.

The beach section of the walk to Reef Island
The beach section of the walk to Reef Island. Photograph by Margaret Bosworth

We concentrated on the beach but the adjacent heathy grassland sounded occasionally to calls of Superb Fairy-wren, Australian Raven and Striated Fieldwren. A young Black-shouldered Kite perched distantly on a dead tree and a male and female White-fronted Chat foraged at the upper end of the beach. Walking was variable and more challenging when we reached the rockier sections. The vegetation was interesting with sea grass draping the lower sections of the mangroves and salt bushes. Near the causeway Black Swans congregated, at least 100 of them in the shallows. Distant views of a pair of Australian Pied Oystercatchers and a solitary Eastern Curlew took some work.

Heading out along the causeway - Bosworth
Heading out along the causeway. Photograph by Margaret Bosworth

As we reached promising areas we added Little Pied, Little Black and Pied Cormorants with list highlights of Great Egret, Royal Spoonbill and Pacific Gull. Then we reached areas of shallow ponds and waders. Scopes up again! Double-banded Plover, Sharp-tailed Sandpiper and Red-necked Stint came first and then Red-capped Plover and Curlew Sandpiper were added later.

Pacific Gull
Pacific Gull. Photograph by Margaret Bosworth

Much discussion occurred over the identification of a godwit but eventually the bird changed position and a confident call of ‘Bar-tailed Godwit’ rang out. Out to the end where we were delighted by a flock of about 20 Pacific Golden Plovers (a few in traces of breeding plumage) and about 20 Ruddy Turnstones with a solitary Grey-tailed Tattler perched on a rock at water’s edge.

Lunchbreak
Lunchbreak. Photograph by Diane Tweeddale

Lunch seated on driftwood or seagrass drifts was a welcome relaxation and then the party divided into the northern ‘rockhoppers’ and the southern ‘gentle walkers’. The former did not add more species but the ‘gentlefolks’ succeeded in locating a previously elusive Red-capped Plover definitively. Not an addition to the group list but personally satisfying to those who’d missed it before. A welcome cool breeze rose about 1pm and fanned hot brows on the return walk. Back at the cars a few departed but most stayed on for bird call where a gratifying total of 45 species was recorded. Not only the total but the composition was much appreciated and we thanked Bill for his work and preparation which went into this successful day.

Diane Tweeddale, Coordinator BirdLife Melbourne Weekdays outings

Sex ratio variation among the Masked Lapwing

Balwyn meeting report
October 2015
Invited speaker, Daniel Lees reported on his research topic. The following is an abstract of his report.

In the absence of data on sex ratios, conservation managers assume a 1:1 ratio which may not be the case, as males and females may exhibit differential dispersal, mortality, size, feeding behaviour and habitat use. With the appropriate data, management authorities could focus on threats to the limiting sex allowing the implementation of more successful management strategies (predator control, sign posting, exclusion zones and education)

In this study we examine whether sex-ratio variation is occurring in the Masked Lapwing Vanellus miles at the primary, secondary or tertiary level.

We radio-tracked 50 masked lapwing Vanellus miles chicks (50 broods) and compared body condition (growth rates; grams per day) and mortality (whether the male chicks were more or less likely to perish than female chicks) We also compared the body condition of all chicks within broods and to establish whether the time of the breeding season affects the brood sex ratio.

Chicks were no more or less likely to be male (or female) as the breeding season progressed. Male radio-tagged chicks (n = 27) were no more or less likely to perish when compared to female radio-tagged chicks (n = 21). At hatching, male chicks were no lighter or heavier nor had shorter or longer tarsi than female chicks Male chicks also grew no faster or slower when compared to female chicks.

This study detected no sex ratio variation or sex-biased survival among broods in the sexually monomorphic Masked Lapwing. This result was as expected and is in line with the Trivers and Willard (1973) hypothesis and the literature which details such variation exclusively among sexually dimorphic species.

Sex ratio variation among the Masked Lapwing

Monitoring survival of free-living precocial avian young is difficult. Perhaps the most promising methods available to determine survival are: (a) a combination of radio-tracking and frequent investigator brood visits or (b) targeted visits timed to mark young after hatching and then again to confirm fledging.

Our aim is to understand if the process of radio-tracking and the associated frequent visits negatively impact chicks when compared to infrequent targeted monitoring visits.

We radio-tracked 50 masked lapwing Vanellus miles chicks and compared body condition (scaled mass index) and within-brood mortality to examine whether attached radio transmitters influenced chick body condition or survival. We also compared the body condition of all chicks from radio-tracked broods to chicks subjected to targeted monitoring to examine whether investigator visits influenced body condition.

Within broods, there was no difference in body condition or mortality between chicks with and without radio-transmitters. Similarly, there was no difference in body condition between broods subject to radio tracking or targeted monitoring.

In agreement with the literature on the ‘glue on’ method of backpack radio-transmitter attachment, the body condition of lapwing chicks was not affected by radio-tracking compared with the targeted monitoring technique. Smaller, less robust and possibly less habituated species may still be negatively affected by radio-tracking. Radio-tracking seems an ethical and practical method for attaining an improved understanding of cryptic life history stages such as chick-rearing in shorebirds.

Note

A Scaled Mass Index (SMI; a mass length relationship; Peig and Green 2009) was used to characterise body condition. All statistical tests were conducted in R (2015) with GLMMs of body condition conducted using the package ‘nlme’ (Pinheiro et al. 2014) and the Cox proportional hazard regression was conducted in the package ‘survival’ (Therneau 2015).

Peig, J. and Green, A. J. (2009). New perspectives for estimating body condition from mass/length data: the scaled mass index as an alternative method. Oikos 118, 1883-1891. doi: 10.1111/j.1600-0706.2009.17643.x.

Pinheiro, J., Bates, D., DebRoy, S. S., Sarkar, D., and Team, R. D. C. (2014). Nlme: Linear and nonlinear mixed effects models. (R Foundation for Statistical Computing.)

Team, R. D. C. (2015). R: A language and environment for statistical computing. (R Foundation for Statistical Computing: Vienna, Austria.)

Therneau, T. M. (2015). A package for survival analysis in R.

Trivers, R. L. and Willard, D. E. (1973). Natural Selection of Parental Ability to Vary the Sex Ratio of Offspring. Science 179, 90-92. doi: 10.1126/science.179.4068.90.