2016 Lyrebird Survey Results

In the pre-dawn darkness on Saturday the 18th of June, twenty-five volunteers and one Park Ranger were greeted with perfectly calm conditions for Tarra-Bulga National Park’s Annual  Lyrebird Survey. Overnight showers had passed by leaving moist dripping foliage in their wake.

The survey is designed to monitor the density of Lyrebirds living in 60ha comprising of wet sclerophyll and cool temperate rainforest immediately to the east of the Tarra-Bulga National Park Visitors Centre. There are sixteen monitoring points strategically placed throughout the site and volunteers move to each site before adult male Lyrebirds start their morning calls at dawn. Volunteers then use a compass to record the direction and proximity of the Lyrebird calls. This year we had enough volunteers to cover all but one of the monitoring points.

2016 Lyrebird Survey

2016 Lyrebird Survey crew ready for action.

Following the survey, lines representing the direction of the calls are plotted onto a map, and triangulation is used to establish the spots where birds were calling from. This year the results indicate we had at least nine (male) Lyrebirds calling in our 60ha zone. This corresponds to a density of one adult male Lyrebird per 6.7 ha. You can also assume that there will be female lyrebirds and immature males or non-calling males within our target area. To account for this to get our overall population of Lyrebirds we multiply the number of calling males by a factor of 2.5. It is believed that male Lyrebirds do not begin to breed until they are around 6 or 7 years old.

Summary of Tarra-Bulga National Park Lyrebird Surveys

Summary of Tarra-Bulga National Park Lyrebird Surveys

2016 Survey Map

Map showing bearings taken from monitoring points and the estimated location of calling male Lyrebirds from the 2016 survey.

 

 

Remote Camera Results Updated to include 2015

Overall total number of species sightings – all cameras

  2012 2013 2014 2015
Antechinus 79 106 86 59
Bassian Thrush 198 198 934 719
Brown Gerygone 0 0 1 2
Brown Thornbill 0 3 0 5
Brush Bronzewing 3 21 590 1356
Common Blackbird 27 16 183 145
Common Bronzewing 0 1 5 0
Common Brushtail Possum 75 13 0 5
Crimson Rosella 7 8 284 5
Cuckoo Fantailed 0 0 0 2
Dog 0 1 1 0
Eastern Whipbird 31 20 143 137
Eastern Yellow Robin 3 4 11 12
Echidna 24 24 63 107
Fantail, Grey 0 3 0 0
Fantail, Rufous 3 3 7 0
Feral Cat 24 49 95 99
Fox 191 323 336 140
Grey Currawong 7 16 23 7
Grey Shrike-Thrush 3 3 8 0
Human 0 0 1 0
Koala 3 14 118 75
Kookaburra 0 9 4 17
Large Billed Scrubwren 0 0 0 2
Long Nosed Bandicoot 287 119 270 652
Lyrebird 486 902 1809 973
Magpie 3 0 0 0
Mountain Brushtail Possum 181 235 243 289
Olive Whistler 7 15 7 10
Pied Currawong 3 6 10 8
Pilotbird 21 50 136 217
Rabbit 191 58 34 90
Rattus Species 120 213 222 189
Raven Species 0 1 4 0
Ring-tailed Possum 7 85 29 67
Satin Bowerbird 21 8 3 5
Sugar Glider 0 4 1 0
Superb Fairy-wren 3 5 66 7
Swamp Wallaby 749 1382 1112 677
Tawny Frogmouth 0 0 3 0
Wedge-tailed Eagle 3 0 0 0
White-browed Scrubwren 89 71 264 130
White Throated Tree-creeper 0 0 4 3
Wombat 202 234 176 130

Without any advanced statistical scrutiny strong trends include:Our remote camera monitoring has now reached four solid years of records. Although not a flawless scientifically planned project there are still be some interesting developments. The table above shows the total sightings of each species combined across all of the camera sites. There are many variables in these results, the main one being that cameras have been moved around different habitats at different times, so have not constantly been in the one place.

  • A massive rise in the number of Brush Bronzewings every year.
  • A rise in the number of other ground dwelling bird species including Bassian Thrushes, Pilotbirds, Eastern Whipbirds and Common Blackbirds.
  • An increase in the number of Long-nosed Bandicoots (although this may be explained by moving cameras to areas where habitat is more suitable).
  • Crimson Rosellas had a huge spike in numbers in 2014 (maybe because there was a lot of wattle seed on the ground?)
  • An upward trend in Echidna and Feral Cat numbers.
  • A drop in Fox numbers in 2015.
  • 2014 had double the amount of Lyrebird sightings than other years.

Several cameras have been left in the same spot for several years and it is possible to compare the results of these sites with the overall figures.

Site: Tarra Bulga – North East

Habitat: Mountain Ash forest with an open understorey consisting of scattered shrubs, ferns and grasses:

Species 2013 2014 2015
Antechinus 0 23 3
Bassian Thrush 36 298 209
Brown Gerygone 0 1 0
Brush Bronzewing 1 121 102
Common Blackbird 5 103 41
Common Bronzewing 1 0 0
Eastern Whipbird 4 79 98
Eastern Yellow Robin 0 1 2
Echidna 5 8 11
Fantail, Rufous 1 0 0
Feral Cat 3 6 16
Fox 40 68 17
Grey Currawong 1 0 0
Grey Shrike-Thrush 1 1 0
Koala 11 0 2
Long Nosed Bandicoot 38 13 8
Lyrebird 106 145 159
Mountain Brushtail Possum 8 10 16
Pied Currawong 2 0 0
Pilotbird 1 23 11
Rabbit 35 11 14
Rattus Species 10 44 65
Ring-tailed Possum 4 0 2
Satin Bowerbird 2 1 0
Swamp Wallaby 55 30 17
White Throated Tree-creeper 0 0 2
White-browed Scrubwren 3 39 24
Wombat 27 53 29

 

Site: West of Balook

Habitat – Forest with an open understorey, canopy consists of mature Silver Wattle.

Species 2013 2014 2015
Bassian Thrush 0 7 26
Brown Thornbill 0 0 1
Brush Bronzewing 10 45 272
Common Blackbird 6 5 1
Common Bronzewing 0 4 0
Crimson Rosella 0 122 3
Eastern Whipbird 1 0 6
Eastern Yellow Robin 0 1 2
Echidna 3 10 2
Fantail, Rufous 0 1 0
Feral Cat 27 22 17
Fox 64 111 53
Grey Currawong 3 5 1
Koala 0 79 30
Kookaburra 10 3 9
Long Nosed Bandicoot 17 0 3
Lyrebird 237 510 116
Mountain Brushtail Possum 46 11 7
Olive Whistler 0 0 1
Pied Currawong 1 4 3
Pilotbird 0 5 7
Rabbit 6 0 2
Raven Species 1 1 0
Rattus Species 0 0 1
Satin Bowerbird 0 0 2
Sugar Glider 0 1 0
Superb Fairy-wren 0 1 0
Swamp Wallaby 955 374 179
Tawny Frogmouth 0 2 0
White Throated Tree-creeper 0 1 0
White-browed Scrubwren 3 18 3
Wombat 54 16 20

Comments: The open nature of this site means it is less suited to small mammals. Popular site for Swamp Wallabies to congregate. Openness also suits many ground feeding birds scratching around or eating fallen seeds. Foxes and cats often pass through. Has been a Koala habitually passing the camera every few days between its favourite trees.

 

Site: Balook Area

Habitat: Open forest with regenerating Mountain Ash, Ferny understorey with some thick scrubby patches near by.

 

Species 2013 2014 2015
Antechinus 0 5 9
Bassian Thrush 9 276 222
Brush Bronzewing 0 101 303
Common Blackbird 0 38 65
Cuckoo Fantailed 0 0 1
Crimson Rosella 0 71 0
Dog 0 1 0
Eastern Whipbird 0 19 13
Eastern Yellow Robin 0 4 3
Echidna 4 1 2
Feral Cat 4 29 17
Fox 136 38 5
Grey Currawong 0 3 0
Grey Shrike-Thrush 0 1 0
Koala 0 3 2
Long Nosed Bandicoot 6 149 168
Lyrebird 123 145 45
Mountain Brushtail Possum 95 73 79
Olive Whistler 0 4 4
Pied Currawong 0 0 2
Pilotbird 2 51 117
Rabbit 17 14 45
Rattus Species 11 79 23
Ring-tailed Possum 19 0 1
Satin Bowerbird 6 0 1
Superb Fairy-wren 0 1 4
Swamp Wallaby 136 184 151
White-browed Scrubwren 0 19 21
Wombat 108 25 14

Comment: Good site for a diversity of species, some scrubby ground-cover in the area makes it a good spot for Bandicoots, with a high proportion of our Bandicoots sightings recorded here. Also good for introduced Common Blackbirds and Rabbits that like to hide in cover. Like other sites had a big spike in Crimson Rosella numbers in 2014. Interestingly large drop in Fox numbers.

2016 Lyrebird Survey

This year our Annual Lyrebird Survey will be held on Saturday June the 18th. The more volunteers we have the better able we are to get an accurate indication of the number of birds in our survey area so attendance by anyone (no experience necessary) is much appreciated. The meeting point for all volunteers is at the park visitors centre at 6.15 am. The count takes only 30 minutes from the time the sun rises and the birds start calling, which means after you have enjoyed your free breakfast it will be about 8.30am and you will be free to enjoy the rest of your Saturday. To secure your place please email friendsoftarrabulga@gmail.com or call David on 0488 035 314 Lyrebird Volunteersby this Wednesday.

2015 Lyrebird Survey

Lyrebird Count 2015 photoOur annual Lyrebird survey is coming up on Saturday May 30th. The meeting place is at the Tarra Bulga National Park Visitors Centre at 6.15 am. On arrival the recording process is explained and people are allocated to various monitoring points around the Bulga Park area.

The survey begins at sunrise with the first Lyrebird calls and only takes around half an hour. Following the morning chorus, a free cooked breakfast is on offer at the Tarra-Bulga Guest House. If you would like to come along you need to contact us (by Wednesday May the 27th on 0488 035 314 or email friendsoftarrabulga@gmail.com. Wear warm clothing, a parka, bring a watch, a torch and compass (optional).

Lyrebird Survey Results 2014

Perfect conditions this year for our annual Lyrebird count, with a beautiful still and mild morning. Another bonus was thirty keen volunteers fronting up for the 6.15 am, which meant we could cover all our 16 monitoring points. Thank you so much everyone for turning up, with many coming from far and wide to participate.

From our mapping we identified at least 10 male birds calling, which in memory is one of our best results. At several stations tracing birds was easy because they were observed calling from trees directly overhead the post. The folk monitoring the Bulga Car Park also reported a male and female (or juvenile male) bird running through their site.

It was hard for many of us to drag ourselves away from the calling birds and across to the guest house for breakfast. The last group back had been lucky enough toc come across a male in full display next to his mound. It wasn’t  only Lyrebirds that were vocal on such a nice morning with Whip Birds, Tree Creepers Kookaburras and others adding to the morning chorus.

lyrebird count 2014

lyrebird count 2014

 

 

2014 Lyrebird Survey

One of our most popular volunteer activities is coming up on Saturday May 31st. The survey, which monitors trends in the Lyrebird population involves an early start. The meeting place is at the Tarra Bulga National Park Visitors Centre at 6.15 am. On arrival the recording process is explained and people are allocated to various monitoring points around the Bulga Park area.

The survey begins at sunrise with the first Lyrebird calls and only takes half an hour. Following the morning chorus, a free cooked breakfast is on offer at the Tarra-Bulga Guest House. If you would like to come along you need to contact ranger Craig Campbell (by Wednesday May the 28th on 5172 2508 or email craig.campbell@parks.vic.gov.au. Wear warm clothing, a parka, bring a watch, a torch and compass (optional).

A couple of birds from our Remote Camera monitoring.

A couple of birds from our Remote Camera monitoring.

2013 Remote Camera Stats

Here’s a breakdown for you all showing the species that triggered our remote cameras last year. The lower number of detection in the later part of the year can be explained by a few issues that we had with dodgy SD cards causing the batteries to conk out prematurely. Can’t explain why the Wallaby numbers vary so much each month. Some of the other species e.g. Lyrebirds, seem much more evenly represented over the year.

Breakdown of Remote Camera
Triggers – Tarra Bulga National Park 2013

Species

Total

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Swamp Wallaby

978

50

44

105

139

164

186

157

28

14

28

15

48

Superb Lyrebird

679

48

46

59

86

70

73

50

72

54

61

38

22

Fox

256

16

22

20

49

39

30

28

20

8

10

10

4

Brushtail Possum

190

12

8

27

33

20

13

20

9

4

11

15

18

Wombat

175

3

12

14

22

33

13

24

10

4

7

26

7

Rat

170

16

2

4

12

7

15

17

27

54

12

4

Bassian Thrush

156

8

11

22

24

4

10

12

20

5

9

4

27

Unidentified Bird

115

6

8

20

12

20

6

3

4

5

15

10

6

Long Nosed Bandicoot

95

9

6

8

13

8

9

5

10

19

4

1

3

Antechinus

84

3

9

8

16

12

5

12

6

2

5

5

1

Small Mammal – Unidentified

76

5

2

2

5

14

6

13

14

5

4

4

2

Ring-tailed Possum

61

1

2

2

2

5

6

18

18

7

White-browed Scrubwren

53

3

1

2

10

6

7

6

2

2

3

8

3

Rabbit

46

1

5

3

2

6

4

4

3

18

Pilotbird

40

4

17

5

1

2

8

1

1

1

Feral Cat

39

3

1

10

7

3

3

4

5

1

1

1

Short-beaked Echidna

19

1

2

2

7

3

1

3

Large Mammal – Unidentified

19

1

4

7

1

2

4

Brush Bronzewing

17

1

2

1

1

3

1

4

1

3

Eastern Whipbird

15

1

1

3

1

3

1

1

1

2

1

Grey Currawong

13

1

8

1

1

1

1

Common Blackbird

12

2

1

9

Koala

11

1

5

2

1

1

1

Olive Whistler

11

1

2

8

Kookaburra

7

4

1

1

1

Crimson Rosella

5

1

4

Superb Fairy-wren

4

1

1

1

1

Satin Bowerbird

4

1

1

1

1

Pied Currawong

4

1

3

Grey Shrike-Thrush

3

2

1

Eastern Yellow Robin

3

1

1

1

Sugar Glider

3

2

1

Fantail, Grey

2

1

1

Fantail, Rufous

2

2

Common Bronzewing

1

1

Raven Species

1

1

Brown Thornbill

1

1

Mystery Species

1

1

Dog

1

1