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Male Spotted Bowerbird's
bowers in successive years

(Chlamydera maculata)
Alternate name(s): "Mimicbird", "Cabbage-bird"
Aboriginal name(s): "wiidhaa" [gamilaraay, yuwaalaraay]

Size: 25-31 cm
Weight: 120-165 g

Back to the Spotted Bowerbird main page .

The male Spotted Bowerbird that has its territory on our property at Eulah Creek, NSW, has displayed some ingeneous skills through the years. By visiting the bower regularly we have been able to monitor the changes that occurred and have tried to relate them to their causes.

Note upfront: The bowers shown below were all found under Wilga trees. With their low, almost horizontal branches and dense foliage they appear to provide optimal cover for a bower.


Overview of the location of the bower of a Spotted Bowerbird on our property, under a Wilga tree, which in turn stands under a taller ironbark eucalypt (July 2013); the bower is visible at the end of the bright ray of light extending under the outer branch of the Wilga tree

Bower "no. 1(a)"

2007/08 season

It is possible that the bower spotted by us in 2007 was in its first year of use. It was made primarily out of grass halms, without a stable base of twigs (see first photo below). The bower is quite simple and looks a bit untidy. Note also the scarcity of trinkets to adorn the alley.

View of the bower of a male Spotted Bowerbird with its trinkets, such as e.g. unripe fruit from our garden; the alley is aligned roughly East-West

2008/09 season

A year later the bower was much improved. It had received a solid base made of strong twigs, into which the grass halms were then stuck. This makes the alley look much tidier and the walls have become a lot higher. In addition, the number of trinkets has increased, but it is still quite small.

The same bower about one year later; note how its appearance and decoration have changed

Bower "no. 2"

2009/10 season

After a small wattle tree fell onto the Wilga under which the bower was located, the bird moved to a new spot, under another Wilga, and brought all the trinkets to its new bower about 20 metres on (see photo below). This bower, although lacking the massive base of its predecessor, is very tidy again. By now the bird had found a broken green bottle and a similarly coloured marble.

NB: The two bowers are much too close to each other to belong to different birds. There is confirmation of this statement in the photos below.

Relocated bower; note the symmetry of the arrangement - bones at the back of the bower, grey and black at the front, red trinkets outside around it, green glass shards and metal at the centre, with a marble as the "masterpiece", perched precariously on the shards

Bower "no. 1(b)"

2010/11 season

A year later the foliage had fallen off the wattle tree that had fallen onto the Wilga covering the first bower. This seems to have changed conditions in a way that made use of the first bower possible again.

In autumn, after the end of the year's breeding season, the male bird refurbished it. Note in the photo below how the new grass halms are firmly rooted in the strong base made of twigs. Once the bower was re-established, the bird started moving trinkets back to it. This is confirmed by the fact that the marble, previously in use as the masterpiece of bower no. 2 (above), has now come back to the refurbished old one.

The old bower in new splendour - although the number of trinkets is still small, the marble has returned and is sitting prominently ontop of a growing heap of glass shards

At the time when the last photo above was taken (May 2011) both bowers were in a well-maintained, usable condition contemporaneously. Both had similar alignments. The first bower is aligned with early-morning sunlight, in the second bower the mid-morning sun illuminates the alley with the glittering shards most conspicuously. The bird was busy moving shards from bower no. 2 back to the original one, no. 1(b). All this happened at a "quiet" time of year for the bird.

Less than two months later (early July) bower no. 2 had been stripped of all its adornments. Instead, bower no. 1 was completely refurbished (see photos below).

The new bower has been stripped and will not be used again; a year later all traces of its existence had vanisehd

The old bower in new splendour - now with a full complement of decorations, including new white glass shards

2012/13 season

There were no major changes for two years, but at the end of the 2013 breeding season we noticed a peculiarity in the shape of the bower. Note how the two side walls of the bower in the photos above are nicely symmetric, with equal heights and angles.

All views shown above were taken looking from east to west. The two shots below were taken from west to east.

By April 2013 one of its sides was much lower than the other, making the whole construction looking clearly asymmetric, as shown in the photo below.

The bower is still featuring glass shards and a marble as its centre pieces; this view is from west to east - the sun rises near the top right-hand corner of the photo

The photo above was taken with a flash. The resulting homogeneous illumination almost completely camouflages the most important effect of the bower's design. This becomes apparent only when looking at the bower in natural light (below).

Clearly the morning sun illuminates the glass shards, making the central heap the obvious attraction in the whole configuration (April 2013)

It is very likely that the asymmetric design has a purpose, namely to get good illumination onto the central heap of glass shards by the early morning sunlight. We have previously observed birds entering the bower from the western side, an approach that will ensure that the sparkling light is always visible and does not get obscured by the body of the bird entering the alley. If correct, this interpretation suggests that bowers can undergo seasonal adjustments.

Bower "no. 3"

2013/14 season

Despite the adjustments made to bower no. 1(b), something must have been wrong with it, because only three months after the photo above had been taken, the male bowerbird decided to move again. This time a new bower was built just two meters from no. 1(b), under the same tree, but closer to the edge of the protective tree crown (see photo below).

New bower at the edge of the protective tree cover, with remnants of the old bower, no. 1b, still visible in the background in July 2013 - at the time the male had a harem of at least four females with him

Note that, contrary to previous convention, this new bower is now North-South aligned. The morning sun does not illuminate the shards and marble at the centre of its (symmetrical) alley.

View of the same bower as shown above (July 2013), now shown from the north; one can see that the two walls of the alley are symmetrical and that the morning sun does not illuminate the trinkets

At the time when the photos above were taken (July 2013), the male Spotted Bowerbird had a harem of at least 5 females around him. We observed up to 6 birds around our house simultaneously.

In the end, there was little or no breeding activity in the 2013/14 season, due to the driest spring in decades, without grass growth or sufficient surface water.

At the end of the 2013/14 season (March 2014) the bower was almost completely exposed due to a lack of plant growth (of both, the sheltering Wilga tree and grasses on the ground)

2014/15 season

In the following season the Spotted Bowerbird had its bower in immaculate condition again, still in the same location, with lots of trinkets (see photo).

In the 2014/15 breeding season the bower is more openly accessible; note the asymmetric configuration of the trinkets: green (olives and glass shards) at the centre, silver-grey (tek screws and other metallic objects), together with Black Pine seeds, in front of the entrance, bonest to the front left and back left; there are no trinkets in the dark shadow of the tree (where nobody can see them)

However, we noticed (by recording sounds around the bower) that there was little or no activity at the start of the season. The male was on its ownfor some time. While in previous years we had observed him with a harem of up to 5 females, early in the 2014/15 breeding season he did not find a mate. While at his bower he was almost always quiet, which may indicate that he knew it was not worth the effort trying to attract females to it. In a 1.5 hour session the male called only 4 times in total; 3 times what is labelled a "contact call?" (below) and once only the bubbling sounds that can normally be heard when he tries to impress a female while showing off his bower and trinkets ("antics at bower"; see below).

Activity increased later in the season, when he was seen and heard with up to three females in tow. By the end of the 2014/15 season the number of trinkets around the bower had increased and their arrangement been changed.

State of the bower in April 2015, with lots of trinkets; this photo was taken in the morning from the northern (uphill) side

2015/16 season

In the 2015/16 season it was time for a move (again). This time the bower, with most of its trinkets, was moved by 100 m, installed again under a Wilga. The Spotted Bowerbird had been heard by us in the vicinity of the new bower's location for many months, but for a long time there was no bower yet where it was later found.

The old bower was still in good condition when we found the new one in August 2015, but most of the trinkets, in particular the main attractions, had been moved (photos below).

State of the old bower in August 2015, with few trinkets left, but still well-maintained; this photo was taken in the morning from the northern (uphill) side

A close-up view shows that the main attractions inside the bower are gone, although lots of bones still remain outside

Bower "no. 4"

Overview of the new bower in August 2015 - its opening is aligned with the morning sun (NE), rather than near mid-day, as the old one had been

This close-up view shows how the sunlight makes the centrepieces, mainly glass and shiny metal, stand out; note (again) the asymmetry, with the steeper wall on the side of the mid-day sun

2016/17 season

Bower "no. 5"

Apparently the location of bower 4, above, was no good, because the bird decided that, after just one season in the new location, it was time for another move. The new bower is about 20 m from the previous one, still about 100 m from the first bower ever found by us years earlier, again under a Wilga, but in a somewhat more open location.

New bower in May 2016; it is E-W aligned and symmetrical

The old bower was in a deteriorating condition when we found the new one in May 2016, with bones and only a small number of trinkets left in its vicinity (photo below).

State of the old bower in May 2016, with few trinkets left, but still well-maintained; this photo was taken in the morning from the northern (uphill) side

Bower "no. 6"

Bower 5, above, was built in a very open setting - and obviously not in favour with the ladies. It was in use for only 3 months, before the male decided it was time to move yet again. Bower 6 was erected very close to bower 4, but not in the same spot. Still, all bowers presented here are within 100 m of each other.

New bower in August 2016; again it is E-W aligned and symmetrical; its location is only about 4-5 m from bower 4, in the same thicket of Acacia salicinas clustered around a wilga

Bower "no. 7"

Bower 7 was erected about 40 m from bower 6, now under a Wilga again. And it is E-W aligned, as its predecessors. Bower 6 quickly decayed after having been abandoned. Still, all bowers presented here are within 100 m of each other.

View from the East of a new bower in June 2017; again it is E-W aligned and symmetrical

Bower "no. 7a"

Bower 7 was relocated by about 1 metre, deeper under an overhanging branch of the same tree, in early 2018. Still, all bowers presented here are within 100 m of each other.

Not a fruit bowl, but a bower... in November 2018; this is much more sophisticated than earlier incarnations - and the owner is clearly having success with "the girls"

The same bower in June 2019, still bowl-shaped; here from one side

The same bower in June 2019, still bowl-shaped; from the other side

In January 2020, after 2 years of severe drought, the shrub under which the bower was located apparently died...

... exposing the bower; this suggested that a move was imminent

On 20 March 2020 the move was confirmed - although by then the shrub had miraculously recovered!

Almost all ornaments have been moved to a new location

Bower "no. 8"

This almost unadorned bower was found on 6 May 2020, only about 10 m from the previous one (above)

On 6 July 2020 it was confirmed as the currently active bower

Bower "no. 9a"

After losing track for a short while, we were able to find the new bower, about 20 m from the one shown above, in August 2021.

The next incarnation of the bower, again East-West aligned, seen here from the East; note the washer - it is typical for a bower to have a prominent "centre piece" (in earlier years it used to be a green marble)

View of the same bower from the West, with sunlight shining on the entrance; not the abunance of trinkets; the dominant colours are silver/grey and green

Bower "no. 9b"

The bower still looked pretty much the same about a year later, but the surrounding vegetation shows that it has, again, been moved - in this case by just a few meters.

View of the bower from the West, with sunlight shining on the entrance; note the abundance of trinkets; the dominant colours are still silver/grey and green - this is the bower in spring (Sep. 2022)

Satin Bowerbird entering the bower

View of the same bower from the West, with sunlight shining on the trinkets; note the adaptation on the left, possibly for the lower angle of sunlight - this is the bower in autumn (Apr. 2023)

Bower "no. 9c"

By July 2023, the bower shown above was found deteriorating and a new one had been built only 3 m away. The new bower has a very sophisticated appearance. Its alignment is NW-SE, exposing the trinkets to afternoon sunlight. This is the first bower in a long succession that is not E-W-aligned.

View of the newest bower from the North-west, with sunlight not quite shining on the trinkets yet at 13:30; note the tall side walls and the neat look, with very precisely shaped inside walls

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