Kāruhiruhi PIED SHAG

This year has seen me go back to university, where I am currently 12 months through a 15 month graduate teaching diploma through the University of Canterbury. This year's busy schedule has meant that my photography has been put on the back burner, and apart from a few brief trips, I've been running on the pedagogical treadmill. So naturally I've had an itchy shutter finger, and been dreaming of pointing the camera at some of my avian friends.

Although my photography has slowed down, there has been some photographic progressions. This year I received an Associateship through the Nature Photography Society of New Zealand (ANPSNZ) and the Photographic Society of New Zealand (APSNZ). I also received honours in this years Trenna Packer Salver for my 'Sea Lion Stare-down' image. My exhibitions have continued and I will be showcasing some images in Hanmer Springs in January 2014.

As the last few weeks of university came to an end, I managed to photograph a local pied shag pair (Phalacrocorax varius) as they brought up their three rapidly growing chicks. What a joy to be able to observe the pair as they built their nest, fed their chicks and interacted with one another. I really enjoy just sitting and watching nesting birds, it's amazing what you see and learn. 

What surprised me when watching this particular pair was the nest building. I was surprised to witness the chicks aiding their parents in nest construction and maintenance. I've witnessed a juvenile Australasian crested grebe aid parents with nest construction for a second clutch, although I have never observed chicks nest build while still nest bound. 

The adult would bring an offering of nest material, usually a stick, and would be greeted by it's nesting partner, who would often throw its head back and commence in a 'yawn' like greeting. The stick would be passed from adult to adult and occasionally to the chicks who would place and fasten the stick to the nest (family team work). 

I hope you enjoy the images below...

As soon as my last assignment was submitted I packed the bags and embarked on a nine day photo trip... photos to come.... keep an eye out!   

Above: Commonly described as "wing-drying" the adult dries it's wings after feeding. Note: Breeding colours present around the eye.

A whole new world: two young chicks peer out of the nest inspecting their new surroundings under their parent's watchful eye.

Begging for a feed: two young chicks beg for a feed, triggering a regurgitation reflex.

Sheltering from the elements: with a soft new down, the young chicks, shelter on a chilly evening.

With its head completely enveloped, a rapidly growing chick receives a stomach full of fish.

Nest construction - a family affair: A stick is passed down to the chick to place on the nest. 

Messy eater: A couple of fish miss their intended target.

Greetings: Greeted by a "yawn", an adult returns to the nest for a swapping of nesting duties.

'Ginger shag': When photographing the' pied shags' I was visited by this strange looking 'little pied shag'.

...Thanks for viewing...

Australasian Crested Grebes, Lake Lyndon

LAKE LYNDON | CANTERBURY

For those who missed seeing some of my 'Wild Aotearoa' exhibition at the Green Room Cafe it is now showing at the Restaurant@Rossendale. Rossendale is a beautiful winery situated just outside of Christchurch. So if you want to go and have a nosy and one of their famous Rieslings go and have a look!  

Rossendale Winery: 136 Old Tai Tapu Road Christchurch 8025    |    http://www.rossendale.co.nz/  

It was love at first sight when I first laid eyes on the magnificently handsome Australasian Crested Grebes or kāmana as they are known in Maori. Kāmana have captivated and intrigued me for the last few years. These birds belong to an ancient order of diving water birds found on every continent in the world. They are renowned for their mating displays and the way young grebes ride among plumage on the back of their swimming parents. Three of the 22 species in this order have become extinct in the last 30 years, and unfortunately Australasian crested grebes are endangered here in New Zealand with approximately 300-400 birds remaining. 

|   Australasian Crested Grebe Nest   |   Lake Lyndon   |   18mm   |   1/320sec   |   f/13   |   ISO500   |   

When I heard there was a pair of Australasian Crested Grebes nesting at Lake Lyndon, in the Canterbury high country I couldn't help but have a look. Lake Lyndon is a relatively small alpine lake and has little to no substantial tree cover except for a few stunted willows, this makes finding the birds relatively easy. I took a trip up to the Lake one Saturday afternoon in hope of having a 'reccy' and locating the nest. The lake was quite busy due to weekend activities and finding the birds proved extremely difficult... they weren't in their usual nesting locations and I began to wonder if I was I too late? Had the nest failed? Were the birds laying low due to the increased human activity on the lake? As the sun set behind the mountains I decided to give up the search and have some dinner... I pulled up to the quiet side of the lake and set up my camp stove; as the water was boiling I noticed some movement in one of the small willows right in front of where I was sitting - I had managed to park within 50 metres of this interesting grebe's nest!

What was particularly surprising was that this nesting pair had already successfully brought up a healthy juvenile and had decided to nest again. It is not uncommon for grebes to re-nest after a failed nest attempt, but to re-nest while looking after a rapidly growing youngster was unusual, in fact I haven't heard of this behaviour before. Furthermore, it was helping its parents build the new nest for its younger siblings. WOW! It would watch its parent dive to collect weeds and twigs to place on the nest, and then copy its parents by placing small bits of weed onto the nest itself. What an amazing privilege to watch this interesting learning behaviour in front of my very eyes! Unfortunately the light was now well behind the mountains to the West and photography was out of the question!
 

|   Australasian Grebe with Juvenile in the Morning fog   |   Lake Lyndon   |   390mm   |   1/400sec   |   f/7.1   |   ISO640   |

I had to get back up there to see if I could photograph these amazing birds! I was able to free up a couple of days around Waitangi Day. I drove up to the lake after work and spent an extremely disrupted sleep in the back of the car due to high winds and cool high country temperatures - I woke to the sound of a couple of angry skylarks chasing a sly stoat around outside the car. Rain, mist and howling winds made for less than desirable photographic conditions and what was worse was that one of the adult birds and the juvenile were nowhere to be seen. I spent the day watching the nest from a distance hoping to see the two birds return and relieve the poor incubating parent who looked as if it had a rougher night than me. The day slowly disappeared and still no sign of the missing birds - I was beginning to lose hope as I had seen a grebe predated on this lake a couple of years back and began to wonder if the stoat had got to one or both of the birds. At around 6pm that evening I was elated when I saw from a distance two grebes returning to the nesting site - yes they had finally returned after perhaps spending the whole day sheltering from the strong winds... I imagined how happy the incubating parent would have been to see these two return. Once back, there was a little socialising and some nesting building before a change of incubating duties...phew! The sky was dark and the wind still made it difficult to get any decent shots so I happily watched the grebe family while enjoying a cuppa - I would hopefully get some better weather and some photo opportunities tomorrow.

 

I awoke early to a still, quiet, foggy morning; the sun had not yet broken the horizon and I was relieved to see all three birds around the nesting site. As the light started to appear through the fog I was able to get to work capturing the grebes in the mist (above). The fog, light and calm conditions made it possible to create some interesting images of the nesting (below).
 

|   Australasian Crested Grebe's Nest   |   18mm   |   1/80sec   |   f/11   |   ISO640   |

The sun began to slowly burn off the fog, creating one of the most beautiful high country mornings I have ever experienced! Soon there was enough light to capture the grebes carrying all sorts of interesting nesting materials (below).
 

|   Australasian Crested Grebe with nesting material   |   360mm   |   1/640sec   |   f/7.1   |   ISO400   | 

|   Australasian Crested Grebe with nesting material   |    175mm   |   1/640sec   |   f/7.1   |   ISO400   |

|   Juvenile Australasian Crested Grebe stretching    |    420mm   |   1/1000sec   |   f/7.1   |   ISO400   | 

As the sun rose and the temperature increased the fog totally lifted and revealed a beautiful high country day. The juvenile grebe was extremely inquisitive and happily preened, hassled its busy parents, stretched (above) and played in the clean and cool alpine waters of Lake Lyndon. Australasian Crested Grebes' legs sit well back on their bodies which make them extremely strong swimmers. As a result the grebes spend their entire lives on the water and they are extremely awkward on land. I spent the afternoon photographing the grebe family -what a wonderful way to spend Waitangi Day. Even though the trip had started off a little rough these special moments made the trip worthwhile. NZ scaups, black-backed gulls, shags, pied stilts, south island pied oystercatchers (SIPOs), banded dotterels, skylarks, NZ pipits, and harriers also resided on the Lake. I managed to snap this SIPO (below) as it had a lazy stretch on Waitangi Day!
 

|   South Island Pied Oystercatcher Stretching  |   390mm   |   1/640sec   |   f/7.1   |   ISO500   |

 

|   Australasian Crested Grebe Eggs   |   Lake Lyndon   |

Last Friday morning I returned to Lake Lyndon with a few friends in hope of photographing the grebes with their newly hatched chicks. We arrived up at the Lake to find three cold abandoned eggs! It is always upsetting as a photographer and conservationist to witness an abandoned nest, especially when you watch firsthand the effort that the parents put into building and incubating. Unfortunately this is not an uncommon occurrence in nesting grebes. In fact an extremely high percentage of nests failed this year in Lake Pearson and Lake Lyndon! Strong winds, choppy waves  and rising lake levels can often flood grebe's nests and wash generated by motorised watercraft can also swamp nests and destroy eggs. Noise and predators can scare adult birds off their nests and leave chicks exposed to the cold or predators. The water levels in the Lake were much lower than the week before and had left the nest vulnerable to land based predators. We wondered whether over inquisitive people or animals such as stoats, cats or raptors had scared the adults off the nest.
 

Thanks for stopping by! A previous Australasian Grebe Blog can be viewed here: http://jonathanharrodphotography.blogspot.co.nz/2011/02/australasian-crested-grebes.html 

THE WILD SOUTH

I recently attended PSNZ's National Convention in Invercargill, Southland. A big thanks once again to the Ronald Woolf Memorial Trust for helping fund my trip!!! I had a fantastic time meeting fellow photographers from all over New Zealand and Australia, it was great to put faces to names, join in on some great tutorials, workshops, field trips and spend time listening to some inspiring speakers. It was really enjoyable being able to immerse myself in photography in such a wonderfully warm and friendly environment.

The convention also gave me a good opportunity to explore the Southland area. I gave myself a few days either side of the convention to photograph the wildlife in and around the Catlins coast. The Catlins is an area of unspoilt beauty and home to numerous species of marine life due to the nutrient rich waters. I particularly wanted to concentrate on two rare marine species the yellow-eyed penguin (hoiho) and the New Zealand sea lion (hookers sea lion).

|  Rough seas, Curio Bay, Southland  |

I love photographing penguins and the yellow-eyed penguin or hoiho were the first stop on my Southland adventure, I had a fantastic time photographing the yellow-eyes and it was great being able to spend some time with the rarest penguin in the world. I arrived in the small coastal township of Moeraki mid-afternoon after the drive from Christchurch and I was really looking forward to getting out of the car and exercising my legs and shutter finger :) As with many penguins species, their loud shrill-like calls alerted me to their presence before getting a sighting, in fact their Māori name, hoiho means 'noise shouter'. Moeraki has great access to the penguins, although the area is heavily fenced off due to the many penguin nesting sites! Fortunately the penguins don't stick within the fences and roam about freely allowing for some great interaction and photographic opportunities. Although the fencing can be a little frustrating for a photographer, the fence's importance was reinforced when I witnessed three tourists literally chase a highly stressed penguin around in hope of getting a snapshot standing next to the poor bird!!! Not all people unfortunately put the welfare of the penguins above a photograph.    

Yellow-eyed penguins are unique to New Zealand and found scattered along the south-east of the South Island. I gave myself a few days after the convention to photograph the yellow-eyed penguins in the Catlins, although I found myself hunkered down for the majority of the time in a little old caravan sheltering from the gale force winds, antarctic wind blasts and downpours of hail, which made a deafening noise against the roof of the caravan - a real glimpse of Southland's dark side! The winds did whip up some impressive swells and I was able to get out in between hail storms and photograph the power of the ocean! It amazes me the swells that the yellow-eyed penguins go out in, and even though they can seem a little clumsy on land, they are the most powerful swimmers!     

|  Surat Bay, Southland  |

Photographing large mammals such as sea lions challenged me in terms of composition; how I fill the frame with my relatively small avian subjects was quite different to how I positioned an adult sea lion. I also found that being at the whim of a 400kg bull sea lion's unpredictable temperament definitely made me more aware of my surroundings. I found the sea lions relatively placid even though I was mock charged a couple of times, especially when testosterone was flying during a play flight or spar. On one occasion I was laying in the sand photographing a female on the Northern end of Surat Bay, there were no other sea lions visible, and I happily spent some time behind the camera confident that there were no other sea lions around. As I snapped away I was unaware of a bull sea lion which was bounding toward me, it must have been sleeping in the high dunes behind the beach... I was alerted by the vibrations in the sand and I can honestly say I don't think I've ever ran so fast - I definitely didn't let my guard down after that, even though probably a playful gesture - I don't think I could handle a sea lion's rough play :) 

|  What you looking at?, Cannibal Bay  |

New Zealand sea lions or Hooker's sea lions (Phocarctos hookeri) are now listed as "nationally critical" and are the world's rarest sea lion. This is the highest threat category in New Zealand and puts them in the same category as the kakapo and Maui’s dolphin! Any species that has undergone a greater than 70% population decline over a period of less than three generations is considered “nationally critical”. Hunting of the sea lions drove them from the NZ mainland approximately 200 years ago, although in the last few years they have slowly made a comeback and there are roughly 150 based on the New Zealand mainland. In 1993 a wonderful thing happened in the small village of Taieri Mouth on the Otago Coast! A solitary female came ashore and gave birth to pup on a local farm, this is believed to be the first pup born on the NZ mainland in over 200 years! Currently the greatest impacts on sea lions are through fisheries by-catch and disease, every year New Zealand sea lions drown due to incidental entanglement in a number of fisheries. Their limited breeding range makes them vulnerable to disease and there have been three mass epidemics of disease over the last 7 years. A Department of Conservation study says that NZ sea lions could be extinct in the next 24 years if there are not tighter restrictions on squid fishing.

Links : | http://www.sealiontrust.org.nz | yellow-eyedpenguin.org.nz | http://www.doc.govt.nz

Suspected avian botulism outbreak in Christchurch

Toll reaches over 4300

Over the past month there has been a dramatic decrease in Christchurch’s birdlife. The Avon/Heathcote Estuary and Bromley area has suffered a real loss of more than 10 per cent of the area’s bird population; a devastating blow to one of the country’s top ten sites for wetland birds. Over 4300 dead birds have been collected in the area; this number surpasses the death toll of the Rena oil spill last year. 

  White-faced heron (9.61% of population killed)

Immediately following February’s earthquake large volumes of untreated wastewater were discharged into the lower Avon and Heathcote Rivers as well as the Avon-Heathcote Estuary. 

A bird survey taken last year, a week after the February quake showed surprisingly that there were approximately 5000 more birds on the Estuary than the previous year (before the quakes), and initial fears that there would be nothing left on the Estuary due to liquefaction were quelled. The initial influx in bird numbers directly after the quake could have been due to birds flocking to the area as ‘quake refugees’.

You only have to look at the estuary and the effects of the quakes are immediately evident - the estuary is now a physically different place. The northern part of the estuary (Avon River mouth) has subsided by 0.2 - 0.5 metres from its previous level and the Southern part (Heathcote River mouth) has risen by 0.3 – 0.5 metres. According to a NIWA report there is an average elevation rise of 0.14 metres which is enough elevation to keep a million cubic metres (400 Olympic-sized swimming pools) of water from flowing in and out of the estuary, that’s one-sixth of its original flow. 

I remember being struck by the amount of liquefaction on the estuary after the February earthquake. Some parts of the estuary resembled the surface of the moon, with large crater like liquefaction mounds covering the mudflats for kilometres! NIWA estimate that up to 40 per cent of the estuary was covered by liquefaction mounds after February! Liquefaction has the potential to smother estuarine biota and I’ve noticed a dramatic reduction in epifauna especially mudsnails and mudcrabs. Crab burrows once covered much of the Avon/Heathcote estuary and there has been a visible reduction of these burrows due to liquefaction cover at my bird photography sites. Mud crabs are an important food source for birds like the kingfishers and herons and there has been a noticeable reduction in kingfishers and herons at these once popular feeding spots.   

    

A NZ Kingfisher with a mudcrab, epifauna such as mudcrabs have lost habitat due to liquefaction

On the 9^th of February an article in The Press expressed its concern with the finding of 600-800 dead birds around the Christchurch estuary, in particular Bromley oxidation ponds and the eastern wetlands area. According to council ornithologist Andrew Crossland the deaths are more to do with the fluctuating water levels and the changes in water quality due to the earthquakes. Over the weekend another article reported that the death toll now is above 4300 birds! The fatalities are thought to be a result of a suspected avian botulism outbreak due to an increase in sewage levels. The Council is working with the Department of Conservation, vets at Massey University, Ministry of Agriculture and Fish & Game to determine the cause of deaths.

The worst affected species are the paradise shelducks, which lost more than 85 per cent of their population (1415 birds), the mallard/grey ducks (49 per cent or 385 birds), and the grey teal (13 per cent or 495 birds), NZ scaup (8.54 per cent), NZ shoveler (3.5 per cent). These staggering numbers mean that there will be a substantial decrease in numbers around the estuary and Bromley, as well as at source areas and migration/dispersal destinations. Duck species are not the only ones that have suffered losses - white-faced herons, royal spoonbills, black-backed gulls and the endangered black-billed gulls, just to name a few, although these species' populations should recover in one to three years. In yesterday’s Press there was a photo of a royal spoonbill being rescued by a DOC officer, suspected of having avian botulism. Providing mildly affected birds with fresh water, shade and protection from predators may help them recover from the intoxication. 

  Male paradise shelduck (85.34% of population killed)

 

 Mallard (49.18% of population killed)

 Grey teal (13.33% of population killed)

 NZ Scaup (8.54% of population killed)

Avian botulism is a paralytic disease caused by the ingestion of a toxin produced by the bacteria, Clostridium botulinum. The bacteria require warm temperatures, a protein source and an anaerobic environment to produce the toxin, and the increased sewage levels due to the earthquakes may have been responsible for aiding in this intoxication. Birds can either ingest the toxin directly or feed on invertebrates such as maggots containing the toxin. Invertebrates are not affected by the toxin but store it up in their bodies. The spread of avian botulism happens when maggots feed on animal carcasses and ingest the toxin, birds that consume toxin-laden maggots can develop botulism after eating as few as 3 or 4 maggots, therefore the swift removal of dead birds will help minimise the spread of the disease. 

 NZ shoveler (3.50% of population killed)

Further facts about avian botulism :-

•          A paralysing, often fatal disease that is caused by a botulism bacterium.
•         Birds suffering from the toxin will have sluggish movements, and will struggle to use their wings, raise their heads or feed as it affects the nervous system.
•      Avian botulism cannot be transferred to humans.

The good news is that the numbers of dead birds being found is slowly decreasing. Regardless of the cause of mass deaths let’s hope that this decline in deaths will continue and that Christchurch will still remain one of the top ten national sites for wetland birds!

 South island pied oystercatcher (0.09% of population killed)