Readers’ wildlife photos

This is the last full batch of photos I have. 🙁

But today we have a glorious selection of water birds (starring DUCKS) from New Zealand, where reader David Riddell lives. His commentary and IDs are indented, and you can enlarge the photos by clicking on them. Be sure to read the notes; you’ll see that several of these species are endangered.

Knowing how much our host likes ducks, I thought I’d put together a few images of water birds from around New Zealand.  Most of these are from the North Island, where I live, but there are a couple of South Islanders in here as well.

The blue duck (Hymenolaimus malacorhynchos) is one of only two duck species in the world that are mountain stream specialists, the other being the torrent duck (Merganetta armata) of South America. Males have a breathy whistle, which gives them their Maori name, whio, while the female call is a harsh, growling croak.  Like many New Zealand birds they’ve been badly impacted by introduced mammalian predators, but with management they’re holding their own and even expanding in some areas, such as the Volcanic Plateau in the central North Island.  For Tolkien fans, this pair was just below Tawhai Falls in Tongariro National Park, which doubled as the Forbidden Pool where Gollum was captured by Faramir’s men in The Two Towers:

Brown teal (Anas chlorotis) used to be the most abundant waterfowl in the country, but again have declined markedly, although numbers have increased in recent years in a few places. They occupied a wide range of habitats, not all of them aquatic.  This pair (male on the right) is part of a population introduced to Tawharanui Regional Park north of Auckland, which has a predator-proof fence across the base of a peninsula, protecting a 588 ha park from rats, cats, possums, mustelids and other exotic predators:

New Zealand scaup (Aythya novaeseelandiae) is a diving duck with a cute, “rubber duckie” profile. They mostly live in deep, clear waters where they feed on submerged water weeds, though this one was on a eutrophic (nutrient-enriched) lake in the small town of Cambridge:

Pacific black duck (Anas superciliosa) can cope quite well with introduced mammalian predators, but is perhaps now the country’s most endangered duck, as it is being genetically swamped by mallards (Anas platyrhynchos), with which it readily hybridises. This one, on the shore of a remote lake on the Volcanic Plateau, has the typically stripy face, and the green speculum with no white band on its upper margin, but the slight smudging of the facial stripes and orange tinge to the legs suggests that even this one has some mallard ancestry.  Fortunately they are still widespread elsewhere in the Pacific:

Mallards have also been in the news here lately as a few individuals on a high country lake in the South Island recently started preying on the chicks of Australasian crested grebes (Podiceps cristatus australis) and had to be “euthanised” as the local media euphemistically put it. The concern was that, being such adaptable creatures, other ducks would learn the habit and it would spread.  The grebes (a subspecies of the great crested grebe, from which it differs mainly by not having a distinct non-breeding plumage) are considered threatened, although their numbers have increased from a couple of hundred in the 1980s to perhaps a thousand today, with more in Australia.  Once almost entirely confined to the high country they are now well established on many lowland lakes, though they have not yet repopulated the North Island, from which they disappeared in the 19th century.  In 2023 the bird’s international profile was lifted dramatically when it was crowned New Zealand’s Bird of the Century after being championed by comedian John Oliver. “After all, this is what democracy is all about,” he said on his show, “America interfering in foreign elections.”  This one was photographed from the footbridge over the outlet of Lake Tekapo – the lake is fed by glacial meltwater, hence the pale blue colour:

While the crested grebe retreated to the South Island, another grebe, the New Zealand dabchick (Poliocephalus rufopectus) went the other way, becoming restricted to the North Island from the 1940s. More recently it’s been expanding again, and recolonised the South Island in 2012.  This is a pair engaging in a courtship dance:

And another dabchick:

Another small grebe, the Australasian grebe (Tachybaptus novaehollandiae) has been colonising New Zealand since the 1970s, though numbers nationwide are still low. Adults have a prominent yellow spot at the base of the bill that looks almost like a second eye, though the colour hasn’t fully developed on this juvenile:

Pied shags (Phalacrocorax varius) are one of 13 currently recognised New Zealand species of shags and cormorants (all usually called shags in New Zealand), making the country a centre of diversity for the family. The same species in Australia is generally a freshwater bird, although in this country they’re most commonly found on the coast.  This one however was nesting alongside the Karamea River in the north-west of the South Island:

Here are two other shag species, at a small lake near my home in the Waikato region of the North Island. On the left is a black shag (Phalacrocorax carbo novaehollandiae), the local subspecies of the widespread great cormorant, while on the right is a little pied cormorant (Microcarbo melanoleucos).  This is a highly variable species; juveniles are entirely black, while adults can range from a white-throated form through to completely pied.  This individual has a rather unusual motley appearance – I suspect it’s an older juvenile moulting into adult plumage:

American readers may be wondering why I’ve put in a picture of such a common species as a laughing gull (Leucophaeus atricilla) – and one in scruffy non-breeding plumage at that. But this was the first individual of the species ever seen in New Zealand, which my wife, daughter and I found two days before Christmas in 2016, when we stopped for a picnic lunch at a beachside reserve near the small east coast town of Opotiki.  It created huge interest among the local birding community, hanging around for several weeks and allowing many people to see it, eventually moulting into its much more handsome breeding colours, with black head and white-ringed eye.  It eventually moved southwards down the coast as far as Cape Kidnappers in Hawkes Bay, and was reported intermittently until October 2018:

Here’s another shot of it, next to a red-billed gull (Chroicocephalus novaehollandiae scopulinus), which is the species you would expect to see in such a place:

Black-billed gulls (Chroicocephalus bulleri) are our only endemic gull (the southern black-backed or kelp gull, Larus dominicanus, also occurs here). Until recently they were classified as critically endangered due to rapid declines at some of their main breeding colonies on South Island river beds, but they’re holding their own elsewhere, and establishing new colonies in the North Island.  These ones are roosting on an old wharf at the southern end of Lake Taupo, the large lake in the centre of the North Island: