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.

Latest Statistics

The IUCN (International Union for Conservation of Nature) has recently issued an updated version of its well-known IUCN Redlist, the most comprehensive and authoritative measure of the endangered-ness of species around the world. According to the latest information, 17,291 species are threatened with extinction out of a total of 47,677 assessed species. "The scientific evidence of a serious extinction crisis is mounting,” according to Jane Smart, Director of IUCN’s Biodiversity Conservation Group.

Below are some graphs, illustrating the most recent statistics. Red areas represent species that are threatened. One thing to keep in mind while looking at these charts--these graphics represent only species that are assessed by the IUCN. So, although just about all of the known mammal, amphibian, and bird species have been described and assessed, only small percentages of the world's known plants, invertebrates, fish, and reptiles, have been assessed. Which of course means that there are a lot of species out there whose status is unknown. They may be threatened or not--we just don't know. If you're interested in more details, check out the Summary Statistics published by the IUCN.

Alien Feeding Frenzy

Giant Ditch Frog aka Mountain Chicken (Leptodactylus fallax), Critically Endangered

In my last post, I wrote about the Mountain Chicken, it's plight, and the work being done by conservationists to set-up a captive breeding programme. These scientists have captured on film a weird and wonderful scene of the breeding habits of this rare frog. It is definitely worth watching.

Female frogs dig a hole and fill it with foam, lay their eggs, and once they've hatched, deposit unfertilized eggs to feed the developing tadpoles. What wasn't known before was just how eager the tadpoles are to get at the eggs. Instead of waiting for the eggs to drop to the bottom of the nest, the younglings swarm their mothers body in a frenzied competition for food.

To stay up to date on the progress of the conservation team, follow along at the dodo blog.

Why is a frog called a chicken? Find out here.

Get Us Out of Here!

Giant Ditch Frog (Leptodactylus fallax), Critically Endangered

The Giant Ditch Frog, also known as the Mountain Chicken by locals due to its size and the taste of its flesh, is confined to two small islands in the Carribbean: Montserrat and Dominica. Although it used to inhabit several other nearby islands, it's total current range on the two islands is less than 50 km squared.

What caused it's decline? Environmental factors such as hurricanes and volcanoes may have played a part, as well as over-harvesting for food, with an estimated annual take of 8,000-36,000 (the government imposed a hunting ban on this former national dish, when populations started to decline).

Adding to the dilemma of this critically endangered amphibian is the world wide chytrid fungus crisis, a disease that is decimating frog populations around the globe. Although the island of Dominica has been infected since 2002, the island of Montserrat managed to remain disease free--until recently. In late 2008 or early 2009 the fungus made the jump to Montserrat and is currently decimating the Giant Ditch Frog population there, killing hundreds in just the past few weeks.

Fortunately, Durrell Wildlife Conservation Trust and the Zoological Society of London (ZSL) have stepped in to help save this rare animal. Going into an area of healthy frogs where the disease had not yet reached, conservationists have successfully removed 50 individuals and airlifted them to Europe for use in a captive breeding program. Twelve of the Frogs will go to the ZSL, 12 to Durrell Wildlife, and the remaining 26 will go to Parken Zoo in Stockholm. The frogs will be kept in special biosecure housings to prevent infection by the chytrid fungus.

The goal is to breed the frogs and reintroduce individuals to disease-free areas of Montserrat within two years. Although the frogs have been bred in captivity before, it is a difficult process, as they have huge appetites and have unusual breeding habits for frogs. After digging a hole in the ground and filling it with foam, the female deposits 15-50 tiny eggs. The eggs hatch and develop into tadpoles, all in this isolated foam nest. For food, the mother deposits unfertilized eggs every few days for the young to feed on.

Although the captive breeding program promises hope for the Giant Ditch Frog, more needs to be done. Durrell Wildlife is currently raising funds to build an additional bio-secure facility to house these endangered frogs. For as little as 10 pounds (15 USD, 18 CAD), you can support the care of a Giant Ditch Frog. Donate or shop online or call Natalie Ranise on 01534 860013 (UK).

Endangered Eating: Frog Legs

There's a great article by Corey Bradshaw, about the enormous number of frogs that are being consumed by humans around the world. With a low estimate of 180 million consumed annually, the upper limit may be far north of a billion.

With habitat loss, global warming, the chytrid crisis and all the other threats facing amphibians and frogs in particular, here's one more thing that's contributing to their decline.

I really encourage you to check out the original article.

Purple, but Ugly

Purple Frog (Nasikabatrachus sahyadrensis), Endangered

The first ever video footage of the Purple Frog is now available, thanks to EDGE (Evolutionarily Distinct and Globally Endangered).

Those who know me well, know that my favourite colour is purple. But the colour of this frog isn't enough to make me call it beautiful. Or even anything short of hideously ugly. This is one creature that truly deserves its place over at Endangered Ugly Things. The BBC recently said that it "looks more like a squat, grumpy blob than a living creature.”

It was discovered in 2003. It spends most of it's time underground, where it eats termites, and only comes to the surface for a few weeks during the monsoon season, to breed. It belongs to the first new frog family to be discovered since 1926, is thought to belong to an ancient lineage of frogs, placing it at #4 on the list of EDGE Amphibians.

Total population is unknown, though it's thought to be rare, as only 135 individuals have ever been observed. Confined to a few small pockets in India, its minimal habitat is threatened, as forests are cleared to make way for plantations of cardamom, coffee, ginger, and other spices.

You can help by learning more about the Purple Frog, or supporting EDGE in its mission of protecting unique and endangered species.

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.

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.

Love 'em or Lose 'em

Being in love makes everything look different. Suddenly, doing the dishes, which used to be a chore, turns into an act of gratitude. A kiss becomes not just an exchange of physical pleasure, but a deep communication of affection and desire. A trip to the shopping mall is no longer an item on the to-do-list, but an opportunity to shower the loved one with gifts.

Loving is a great act of unselfishness, and sometimes unselfishness means sacrificing to make the loved one happy.

The world, right now, needs some love.

More specifically, the frogs, toads, and other amphibians of the world, need some love. They're desperate for love. In fact, if they don't get some love soon, they'll die. From agricultural pollutants, from invasive species, from poaching and hunting, from deadly disease, and climate change. Without some love, thousands of species of amphibians will be extinct, before my yet-to-be-born children ever have a chance to meet them, or get to know them.

In the past decade or so, over a hundred amphibians have become extinct. About 3000 more are in danger of disappearing. Amphibians are a vital link in ecosystems around the world, and as they disappear, those ecosystems will begin to crumble. And as they disappear, so will the medical cures that they hold. Cures that are the key to saving the lives of people we love.

All of this lack of love is not because amphibians are unlovable, or because people don't want to love them. It's just that sometimes we're not very good at knowing how to show our love. Sometimes we bring flowers, when a back rub would have been more appropriate. Sometimes we try to say the right words, when we should have just listened.

So how do you love a frog? 2008 has been designated the Year of the Frog (YOTF), and it's purpose is to show the amphibians of the world that they are loved, and to show people how to love them. The Amphibian Ark, a collaboration between conservation organizations, is leading the effort, and will be promoting frog conservation around the globe. Their plan is to work with zoos, botanical gardens, museums, universities, or anyone else that is able, to house the most endangered species, until the extinction crisis can be averted. The eventual goal, of course, is to return the species to the wild.

So. This year, 2008, love a frog. Get involved. Tell your friends. Volunteer. Live greener. Sign the petition. Learn more. Donate. Love.

An Absence of Amphibians

Old pond
and a frog-jump-in
water-sound

This famous haiku by the Japanese poet Bashô evokes images of an evening filled with the chorus of croaking frogs and splashes as they leap into an old pond. Unfortunately, unnoticed by the majority of the world's population, frogs around the world are falling silent. As various threats to their survival converge, like ants on a fallen bread crust, amphibian species in every nation are facing extinction. Threats such as habitat loss and fragmentation, climate change, pollution, and invasive species are stacking themselves up against amphibian populations. To top it all off, the deadly chytrid fungus, perhaps helped along by global warming, is devastating amphibians everywhere. Chytridiomycosis, the disease caused by the fungus, causes a problem in the functioning of the amphibian's pores, making it difficult for them to absorb water. Without the ability to rehydrate, they soon die from a lack of water.

Now, scientists around the world are working together in an effort to save the amphibians from impending doom. Amphibian Ark, a collaboration between several conservation organizations, is asking zoos and botanical gardens around the world to create a safe haven for a species of amphibian. These havens would only be temporary, until the disease crisis has been averted, and the animals can be safely returned to their natural habitats. If their efforts are unsuccessful, I don't want to imagine what will happen to the balance of the world's ecosystems as a whole class of animals is wiped out.

This issue is not something to be taken lightly. It's downright scary when you think of the implications of what could happen if all of the frogs, toads, and other amphibians disappeared. Frog Matters, a blog with the latest happenings from Amphibian Ark has a great post on things that anyone can do to help prevent a mass extinction.

Donate now to help prevent the next great extinction.

When it rains, it pours.

Booroolong Frog (Litoria booroolongensis)

Another rare species of frog is on the brink of extinction. And no wonder. The Booroolong tree frog is confined to less than 10 square kilometers, has been affected by the frog-killing fungus, chytridiomycosis, has to deal with invasive species preying on its eggs and tadpoles, has lost much of its habitat, and the area where it lives is undergoing a drought, drying up it's breeding grounds.


Donate to the Amphibian Ark, a movement saving frog species in decline.

In Memory of: the Gastric Brooding Frogs

Northern Gastric Brooding Frog (Rheobatrachus vitellinus)
Southern Gastric Brooding Frog (Rheobatrachus silus)

The Gastric Brooding Frogs were unique. No other frogs like them are known. Little known or undiscovered until the 1970s and 80s, both species had died off by 1985. These two extinct Australian frogs didn't raise their young in the usual way. While most frogs mate, and then lay their eggs in or near water and allow them to hatch, Gastric Brooding Frog females, as their name suggests, swallowed the fertilised eggs, and allowed them to develop in her stomach. The eggs, and then the tadpoles, lived off of yolk, and both produced a hormone which prevented the mother's stomach from producing digestive acids. During this period, the mother didn't eat, but remained active. Once the babies completed their metaorphosis from tadpole to frog, the mother regurgitated them, and they hopped out of her mouth, fully formed. Unfortunately, not much more is known about them.

So sad to see you go, crazy frogs.

Large, but Hard to Find

Goliath Frog (Conraua goliath)

Check out this great post about the Goliath Frog, over at Endangered Ugly Things.

Endagered Eating - Mountain Chicken

Giant Ditch Frog (Leptodactylus fallax)

Mountain Chicken Legs with Pears

Ingedients:
COOKING TIME: 7 - 8 MINUTES
SERVINGS: 6

1 1/2 lb hard pears
6 pairs frog legs
1 dessertspoon oil
1 tsp ginger root juice
1/2 tsp sugar
1 tsp sherry: salt
1/2 pint veal stock
1 tsp cornflour
2-3 tbsp cold water
few drop sesame oil

Core and slice the pears. Cut each frog leg into 2 pieces and put in hot oiled pan together with ginger root juice, sugar, sherry and salt to taste. Cook for 2 minutes. Remove frog legs and put in a dish. Add pears to the pan and cook for 2 minutes. Add cornflour diluted with water, and sesame oil, cook for 1 minute and serve.

The Giant Ditch Frog, is also known as the Mountain Chicken, supposedly because of its taste and size. It used to live on a number of Carribean islands, but is now confined to two: Montserrat and Dominica. One of the problems facing this frog besides the ever present chytrid fungus and the fact that much of their habitat on Montserrat has been destroyed by volcanos, is over-harvesting by humans for consumption. Invasives, such as pigs and rats, which disturb the frogs during breeding season, or feed upon the frogs, are also a problem. As you can see, the cards are stacked against this frog.

If you'd like to help, donate to Durrell Wildlife. They have a captive breeding program, and would also like to implement some new initiatives, including wild pig control, and education programs aimed at reducing the rate of consumption.

Frozen frogs may not stay frozen

Wood Frog (Rana sylvatica)

This species of frog, while not endangered, may soon be threatened by rising global temperatures. It's blood and physiology allow it to undergo multiple freeze-thaw cycles. When it get's too cold, the frogs simply freeze in place, their heart and lungs stop, and they turn into a literal ice cube. Once it warms up again, their hearts start pumping and they resume hopping around. Freezing during the winter helps the frogs by eliminating their need for food for those long months when none is to be had. With warmer temperatures around the corner, these frogs may find it difficult to survive the barren winter unfrozen.

Read about the mechanism frogs use to survive the freeze-thaw cycle, and how scientists hope it can benefit humans. An older article from National Geographic about frogs and Global Warming in general.

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.

Endangered Frog Bred Successfully in Captivity

Fiji Ground Frog (Platymantis vitiana)

This story is a little old, but still good news. A student at the University of South Pacific has managed to breed the endangered Fiji Ground Frog. They are only found on two small islands in the Republic of Fiji, and their habitat is very fragmented, and numbers have been declining. These frogs have never been bred in captivity, and this gives hope that they can be preserved if their habitat is destroyed.

Species of the Week, Feb 18

Blue Poison Frog (Dendrobates azureus)
All frogs worldwide



The Blue Poison Frog is one of the most (in my opinion) beautiful frogs in the world. But that might just because I happen to like blue better than green, orange, red, yellow, or a bunch of other colours. It lives in the South American country of Suriname, on Vier Gebroeders Mountain, and nowhere else in the world. Well, nowhere else in the world except a lot of zoos', aquariums', and collectors' glass tanks. This is actually a good thing, since its abundance in captivity means that it is not at threat in the wild from poaching. It may be threatened in its tiny range, from time to time by fire.

More alarming is the worldwide outbreak of Chytridiomycosis, a fungus affecting at least 30% of the world's frog species, and contributing to a planet-wide decline and extinction of amphibians. The World Association of Zoos and Aquariums and the Botanical Gardens Conservation International have teamed up to create a global Amphibian Ark--a system of zoos and gardens that will house endangered species, while the fungal and other crises are dealt with.

In honour of frogs throughout the world, all posts this week will be frog-themed.