Numbat Numbers

Numbat (Myrmecobius fasciatus), Endangered

Having just spent several months living and working in Australia, Australian species are especially interesting to me right now. Koalas, Kookaburras, and Kangaroos all crossed my path, as did Wallabies, Wattles, and Wombats. What didn't cross my path was a small creature known as a Numbat. This is likely because the Numbat is no longer common in the state of Victoria, where I spent almost all of my time.

Numbats used to live all across the southern regions of Australia. Their population was reduced to two tiny pockets in the state of Western Australia after the introduction of foxes. Since then, it has been reintroduced to a few small conservation areas, but still numbers less than a 1 000 animals in the wild.

The Numbat diet is a little bit monotonous, consisting of nothing but termites. Each individual can eat between 10 000 and 20 000 termites in a day! Unlike many other termite eating animals, however, Numbats are small, and lack claws or any other method to open up termite nests. This means that they have to forage for termites when the termites themselves are out of the nest foraging--that is, during the day--making it one of the very few marsupials active during the day. Being active during the day like this is thought to make them more susceptible to predation.

In the evening, when they aren't foraging, these rare marsupials retire to their burrows, which are very often inside of hollowed out logs. It is thought that an abundance of hollow logs to hide in may have saved the two groups of Numbats that survived in Western Australia, as they provided protected hiding places from predators.

These stripy furry animals are cute, no doubt about it. They're one of Western Australia's State Emblem's, and they've also been chosen as the icon for the Conservation Council of Western Australia. A captive breeding and reintroduction program is underway, and Numbats are bred at Perth Zoo and released each year into managed habitat. Here's a great video about hand-rearing baby Numbats at the zoo.

If you want to help Numbats, you can donate to Perth Zoo's Wildlife Conservation Action.

Yaminon

Northern Hairy Nosed Wombat (Lasiorhinus krefftii), Critically Endangered

This cute-ish animal is critically endangered. Endemic to Australia, it's range has steadily decreased, until in the early 80s, there were only 30-40 individuals in tiny Epping National Forest Park, about 800 km northwest of Brisbane. In 1982, Cattle were excluded from their habitat, and their population has risen to over 130.

In May of 2009, a number of Wombats were moved from Epping to a newly created nature reserve, just north of St. George, providing some protection for the species. The biggest threat to the species is a catastrophe such as fire, flood, drought, or disease, that could wipe out the entire population. Having two separate populations is a bit of a disaster insurance policy.

This largest of Wombat species, also sometimes referred to as the Yaminon, is now protected in both locations by predator proof fences to keep out dingos and other predators. Conservationists managing these populations engage in reproductive and behavioural research, as well as controlling invasive species of grass, controlled burns of habitat, DNA studies to estimate population (by collecting hair samples with tape), and much more.

If you want to help out this nearly extinct animal, here's some ideas:

You could of course donate to the Wombat Foundation.

Or you could buy some children's books featuring Willit the Amazing Wombat.

Most importantly and least expensively though, you could learn more about the Northern Hairy Nosed Wombat, and then tell your friends.

Here are some very informative sites:

From the Queensland Government.
From Evolutionarily Distinct and Globally Endangered (EDGE).
From the Wombat Foundation.

Orange Bellied (Yellow Breasted Green Headed Blue Winged) Parrot

Orange Bellied Parrot (Neophema chrysogaster), Critically Endangered

Photo copyright Dave Watts

The Orange Bellied Parrot is sick, and this is a really bad time to be sick.

With a mere 50 or so individuals surviving in the wild, this species is edging closer to extinction every day. For the past few years, the wild population has been estimated between 140 and 180 birds--a steep decline from 'common, or locally abundant' in the 1920s. Only in the past year have the numbers dropped even lower as sightings of wild birds have grown fewer.

Three captive breeding populations exist in zoos around Australia, and it's these unfortunate Orange Bellies that are sick. An unknown virus has infected birds in the captive breeding program, causing some of them to lose their feathers and weakening their immune systems. Scientists believe that the virus may spread more easily in the captive population because they are so close to each other. The program has had some success annually releasing captive-bred birds to help sustain the wild population--so if the captive breeding program suffers, so will the wild population.

Orange Bellies are a migratory species, breeding and nesting in southwestern Tasmania, and spending the rest of the year in coastal areas in South Australia, Victoria, and New South Wales. This month is migration month, and all wild Orange Bellies are making their way south to Tasmania, where mated pairs will build nests and lay 2-6 eggs.

Of course, these parrots also face the usual threats of habitat loss and invasive species. You can learn more about their food, habitat, life cycle, and what's being done to help them here. If you live in Australia and want to help, you could volunteer with Birds Australia.

3000 Frogs Isn't Very Many

Photos courtesy of Frogwatch.

White-bellied Frog (Geocrinia Alba), Critically Endangered

Sixty White-bellied Frogs are now exploring their native habitat for the first time, after being released into the wild last week. These glossy bellied frogs live only in the province of Western Australia, where they have the dubious distinction of being this region's only critically endangered frog species.

The total population of all White-bellied Frogs is estimated at less than 3000. This might be an impressive number if you were talking about Facebook friends or gigabytes of data, but when you're talking about the entire population of a species, 3000 equals hanging by a thread.

They are mostly being affected by habitat loss, and a related problem, habitat fragmentation. As humans encroach on their living space, they also divide it. These frogs are known to exist in 56 subpopulations, with no movement between any of the groups.

This latest release is the first time young frogs (aka froglets) have been introduced to the wild from the captive breeding program run by the Department of Environment and Conservation. Transplantations of large numbers of eggs have occurred, but the results of this new approach will help scientists determine the best methods of helping boost the population of this unique amphibian.

Check out the Amphibian Ark--an organization dedicated to helping endangered frogs all around the world.
Read more details here or some technical data here.

Farewell, Tiny Friends

Christmas Island Pipistrelle (Pipistrellus murrayi), Critically Endangered

Sometimes, saying goodbye is hard. It's not hard to say goodbye to your friend, when you're leaving the coffee shop, because you know you'll see each other tomorrow. It's a different story though, when you're saying goodbye to your friend, because they're getting on a plane to Peru and you don't know if you'll ever see them again.

That's kind of how I feel right now about the Christmas Island Pipistrelle. This tiny bat, weighing about the same as three paperclips, has been saying farewell for the past 14 years. For more than a decade, the CI Pipistrelle has declined at least 10% percent every year. Now, in 2009, the total number of CI Pipistrelles likely stands at less than twenty.

Without a last minute miracle, this bat is headed straight for extinction. In fact, it may already be extinct. With the hope of starting a captive breeding program, eight scientists have spent an entire month in an unsuccessful last ditch effort to trap any surviving bats.

The reasons for the relatively rapid decline of this bat are unclear. Most scientists involved seem to believe that it's demise is linked to one of the numerous non-native species introduced to Christmas Island--the small Australian island which is the sole habitat of the CI Pipistrelle. Whether it was the Common Wolf Snake, the Black Rat, the Yellow Crazy Ant, or some other species that resulted in its decline, the point is now almost moot.

Although there is a small chance that scientists may succeed in trapping a few bats to start a breeding program, as long as the non-native species remain, the Christmas Island Pipistrelle will not be living happily on Christmas Island.

And so, to the CI Pipistrelle, I bid a very sad farewell. I hope this isn't goodbye forever.

Mushrooms for Breakfast, Mushrooms for Lunch, Mushrooms for . . .

Gilbert's Potoroo (Potorous gilbertii), Critically Endangered

Gilbert's Potoroo, named for the English naturalist John Gilbert, is perhaps the most endangered marsupial in Australia. Known as the Ngil-gyte by local aboriginals, it is a small marsupial rat-kangaroo, with soft fur, bulging eyes, and a tail almost as long as its 30cm body. If you know what bandicoots and wallabies look like, a potoroo is somewhere in the middle. Fewer than 50 wild individuals are restricted to two tiny areas on the southern coast of Western Australia.

These shy nocturnal creatures are an oddity in the mammal world, in that they are fungivores. That is, 90% of their diet consists of truffles, the fruiting body of underground fungi. The spores of over 40 types of truffle have been found in their dung! The rest of their diet consists of small insects and small fleshy fruit.

It was first discovered around 1840 in southwest Australia, when John Gilbert wrote that large numbers were procured by aboriginals for food in the space of a few hours. By 1870, it was believed extinct. It wasn't until more than 120 years later, in 1994 that Gilbert's Potoroo was discovered, still alive in Two Peoples Bay Nature Reserve. Since then, a captive breeding population has been established in the same area, and another wild population has been established on nearby Bald Island. Currently, plans are underway to establish a third wild population at Waychinicup National Park.

The establishment of these distinct populations is crucial to increasing Gilbert's Potoroo's chances of survival. Threatened by wildfire (they live in dense, highly flammable vegetation that has remained unburnt for 50 or more years), introduced predators (feral foxes and cats), and changes to their habitat, their tiny population is at constant risk of extinction by a single catastrophic event. That is, a single wildfire could wipe out the majority of the population.

Research continues to learn more about the needs of Gilbert's Potoroo, as well as to help conservationists increase the breeding success of the captive population.

If you live in Western Australia, you can volunteer with the Gilbert's Potoroo Action Group, dedicated to preventing the extinction of it's namesake.

Learn more about Gilbert's Potoroo at Western Australia's Department of Environment and Conservation website.

Eggs, Eggs, Eggs

Kakapo (Strigops habroptila), Critically Endangered

According to Radio New Zealand, this year could be a lucky one. With a population of less than 100, the critically endangered Kakapo has been slowly increasing due to dedicated conservation efforts. This breeding season, the Kakapo Recovery Programme is hoping for forty chicks.

Previously on this blog, the importance of rimu fruit to Kakapo breeding was discussed, and it appears that a bumper crop may be in the works. Additionally, there are more fertile adult females, than there have been in years. If these factors come together, the Kakapo population could increase by nearly 50 percent. With so many chicks, some would be raised by their parents, instead of hand-reared by humans, as they sometimes are when chicks are rare.

The breeding season has started less than a month ago, with the first mating of the season occurring on Christmas night. Chicks are expected in late February.

Keep up to date by following the Kakapo Ranger Diaries.

Donate, Volunteer, or Get Involved.

Some Birds May Smell Sexier

Kakapo (Strigops habroptila), Critically Endangered

The Kakapo, featured here several times, might benefit from a little cologne it appears. Scientists working with the Kakapo breeding program, noticed that a few of the males received significantly more attention than others, and they think it may have to do with the birds' body odor. To find out, they're sending feathers to Tom Goodwin, an animal olfactory chemist in Arkansas.

Because the Kakapo's population dropped to a gene-pool-reducing 91 individuals, genetic diversity is very important to their survival. If most of the females are only breeding with a few males, the gene-pool could remain dangerously small. If a synthetic perfume that makes less attractive males seem sexier can be developed, their genes would also get remixed into the overall population, increasing the diversity of the gene-pool.

If you want to help save the Kakapo, you can donate, become more informed, or get hands on and volunteer with the Kakapo Recovery Programme.

Hector's Dolphins Still Unprotected

Hector's Dolphin (Cephalorhynchus hectori), Endangered

A new study by researchers at New Zealand's Otago University has added to the mountain of evidence that Hector's Dolphins are being killed at a rate that will lead to their extinction . . . unless something changes. These dolphins, with their uniquely rounded dorsal fins, are declining due to commercial and recreational fishing using gill nets and other methods that entangle them as bycatch.

Hector's Dolphins have the most limited range of any cetacean, except the Vaquita. Living only around the coast of New Zealand's two islands, they are divided into two subspecies. The South Island Hector's Dolphins have been reduced to less than 7500 individuals, while the Critically Endangered North Island subspecies, also known as Maui's Dolphins, have been reduced to a mere 110 individuals.

The New Zealand government has restricted fishing in parts of the Dolphin's range, but complete protection has not been realized, partially because of resistance from the fishing industry.

If you want to help, you can petition the New Zealand Government to enact full protection, adopt a Hector's Dolphin through WWF New Zealand, or join a Facebook Cause dedicated to the Hector's and Maui's Dolphins.

Fortune 500

Booroolong Frog (Litoria booroolongensis), Critically Endangered

Over a year ago, I wrote of the Booroolong Frog, a critically endangered species, confined to less than 10 square kilometers, and decimated by drought and forest fires.

Now, the species will receive a boost of 500 captive bred frogs, who are primed to breed. The 9 month old frogs are the offspring of 6 adults and 20 tadpoles that were taken into captivity two years ago. According to scientists involved with raising them, the males will mate in a brief breeding frenzy and die.

The species has declined because of habitat degradation and the chytrid fungus, which has affected amphibian species around the globe.

Donate to the Taronga Zoo, which is breeding Booroolong Frogs for release into the wild.

Or Donate to the Amphibian Ark, a movement working to save all frog species in decline.

No More Protein!

Kakapo (Strigops habroptila), Critically Endangered

The Kakapo is a large ground-dwelling parrot, found only on two small, isolate islands in New Zealand. The total number of birds has risen to 91 in the past year, but this number is still precariously low.

Part of the problem is that Kakapo only lay eggs every three to five years, when Rimu Trees produce an especially large harvest of fruit. When this happens, the Kakapo feast and breed. Scientists have been trying to increase the frequency with which these beautiful birds breed, by supplementing their diets with protein, known to be an important nutrient for other breeding species.

Now, the importance of protein for the Kakapo is being questioned. Professor David Raubenheimer has recently analyzed the nutrient content of the Rimu fruit, and found that it is low in protein and high in calcium. He thinks that calcium may be more important for breeding Kakapo, as it would be used in their eggshells and incorporated into their unusually large skeletons.

Scientists will continue to try and increase the breeding frequency of the Kakapo to boost the population, by using a new formulation of feed that more closely matches the content of the Rimu fruit. One question still remains, however. Is it just the nutrients that are limiting the Kakapo, or are they programmed to breed only when there is an abundance of Rimu fruit?

If you want to help save the Kakapo, you can donate or just become more informed.

Jabba the Hutt or Rare Frog?

Bornean Flat-headed Frog (Barbourula kalimantanensis), Endangered

On the island of Borneo, lives a frog that has been described by David Bickford as "a squished version of Jabba the Hutt," the slimy slug-like character from the Star Wars movies. Resembling a famous alien, however, isn't its claim to fame. Bickford, of the National University of Singapore and a team of scientists, recently discovered that Barbourula kalimantensis is the only known lungless frog in the world. It 'inhales' 100% of its oxygen through it's skin.

Scientists speculate that the adaptation has allowed this frog to survive in the clear, cold, fast-flowing streams where it lives. Having lungs would make the frogs more buoyant, and hence more likely to be washed downriver. As it is, the denser lungless frogs can more easily sink to the bottom of the river without being swept away. This fast-flowing cold current habitat, is what makes lunglessness (is that a word?), possible. The cold water can hold more oxygen, and the current delivers it quickly and efficiently to the frogs flattened body, which provides a greater surface area for gas exchange. In water that is still, warm, or even slow-moving, these flat frogs can't survive.

Which is unfortunate, because the rivers of its forest home, are becoming slower and warmer, as illegal logging and gold-mining pollute the rivers and destroy vital habitat. The Bornean Flat-headed Frog may be headed for extinction if action isn't taken very soon.

If you want to help, you can donate to the Heart of Borneo project, organized by the WWF, which aims to conserve a chunk of rainforest. You can also donate to Amphibian Ark, an organization committed to conserving frogs and other amphibians.

Kakapo - 91 and counting

Kakapo (Strigops habroptila), Critically Endangered


The critically endangered Kakapo is now five newly hatched chicks further away from extinction. The five chicks were recently hatched on Codfish Island a southern New Zealand island. The new hatchlings bring the world's total Kakapo population to 91, and if two more existing eggs hatch live chicks, it will rise to 93.

Part of the reason for the slow rise in Kakapo numbers, is that they only breed every three to five years. The breeding years are linked to years in which certain trees produce high yields of fruit. Scientists think that they may have found a way to mimic the conditions of these high fruit yields, by using some of the chemicals in the fruits themselves, that may trigger the birds to breed. If so, they may be able to increase the number of Kakapo eggs laid each year. For a more detailed explanation, check out this article.

Here's a video of a newly hatched Kakapo.

If you want to help save the Kakapo, you can donate or just become more informed.

Caught!

Fly River Turtle (Carettochelys insculpta), Vulnerable

Fly River Turtles, having a unique nose, are also referred to as Pig Nosed Turtles. And this is pretty self-explanatory. They are the only freshwater turtles to have flippers resembling those of marine turtles.

Back in March of 2004, a San Francisco pet shop owner smuggled 14 live baby Fly River Turtles into the United States, hiding them in his clothes. He was caught, and the turtles confiscated and given to zoos and aquariums in California. Last Thursday, he pleaded guilty to the charges, and in February, will be sentenced.

These animals, found in Australia, Indonesia, and Papua New Guinea, are protected in these countries as well as by CITES (Convention on International Trade in Endangered Species). They are listed as Vulnerable by the IUCN, with the declines in their population being noted over the past decade. Probably the largest contributor to their decline? Over-harvesting by humans.

Devil Facial Tumour Disease

Tasmanian Devil (Sarcophilus harrisii)

In 1996, the Tasmanian Devil was placed in the category of animals at 'Least Risk' of extinction. In that same year, a few devils were observed and photographed with growths and tumors on their faces. Today, 10 years later, it is estimated that 40% of the Devil population has been wiped out by what has come to be known as Devil Facial Tumour Disease (DFTD). The disease causes large tumours to grow on the faces of the Devils, and once the tumours appear, there is no recovery--at least not yet. Researchers are actively pursuing research to combat DFTD and preserve the threatened population of Devils.

DFTD is transmitted by allograft, which is fairly rare. Allograft occurs when diseased cells are passed physically from one individual to another. In the case of DFTD, it is thought that the cells are passed between individuals during their frequent scuffles, or mating which often involves biting the necks of their partners.

Currently, captive breeding populations have been established to ensure that the species will survive in the event that DFTD causes them to disappear from the wild. There is also concern that competition with introduced species such as foxes will hinder the Devil's ability to recover.

Tasmanian Devils are confined to the island of, well, Tasmania, and are named for their eerie calls (my friends will tell you that at times, I can be convinced to attempt an imitation).

Here's a site with info on how you can get involved, donate, or volunteer.

Poison, Pests, and Politics

Grey-headed Albatross (Thalassarche chrysostoma)
Wandering Albatross (Diomedea exulans)

Macquarie Island, a World Heritage site, and part of the Australian state of Tasmania, is currently overrun with pests. Cats, rats, and rabbits were introducted to the island in the 19th century by sealers and whalers, all of which are extremely harmful to the native wildlife, especially birds. And the birds that live here include several endangered and vulnerable species. About 80 pairs of Grey-headed Albatross breed there, and the island is important habitat for both Grey-headed and Wandering Albatrosses.

In 2000, the last cat on the island was removed, but this had the unfortunate effect of allowing a population explosion among the rabbits and rats that were left. Plans are underway to exterminate the rabbits and rats, using poison delivered by helicopters during the winter, when most of the birds are at sea. However, the plans have been delayed because of wrangling between the state and federal governments over who should fund the approximately 16.5 million dollar program. The federal government has agreed to fund half the program, but the state believes they should cover the whole cost.

Cool fact about Macquarie Island: It is the only place in the world where the oceanic crust is exposed above the surface of the sea.

Articles, articles, articles.

More good news for the frogs

Spotted Tree Frog (Litoria spenceri)

In Kosciuszko National Park, Australia, a captive breeding program has been successful beyond scientists expectations. The Spotted Tree Frog population crashed in 1998, which scientists believe was caused by the chytrid fungus outbreak mentioned in a previous post. Nearly 20% of the frogs released last year, have survived, suprising scientists who said "we'd have been very happy with 5% survivorship."

Captive breeding and release programs have been tried many times before with limited success. The reason for the success of this particular program is not well understood, but scientists hope that captive breeding and reintroduction may be a means to save many frogs from extinction in the near future.

If At First You Don't Succeed . . .

Takahe (Porphyrio hochstetteri)

A mated pair of Takahe's, birds indigenous to New Zealand, recently made an unsuccessful nesting attempt, producing two infertile eggs. The ecologists working with the birds say that they are young and still getting the hang of being good parents, and are hopeful the pair will make another attempt in the near future. Here's the original.

Here's more info and images on Takahes.

Possibilities

I can't really point to a specific incident that caused me to feel strongly about endangered species. I do know that I've always enjoyed learning about interesting plants and animals (and they're all interesting, if you look hard enough). Probably, it's the thought that I may never get to hear the booming calls of the New Zealand kakapo, or see a black-footed ferret peeping out of an abandoned prairie dog mound in South Dakota, or swim in salty blue water with a leather back turtle. I may not get to do some of these things even if all endangered species survive years into the future, but I'd rather live in a world where the possibility exists.