Archive for introduced species

IUCN Species of the Day: Pale-Headed Brush-Finch

Posted in IUCN Species of the Day with tags , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , on August 2, 2011 by Bush Warriors


The IUCN Red List of Threatened Species(tm)
Pale-headed Brush-Finch

Photo credit: A. Soronza


The Pale-headed Brush-finch, Atlapetes pallidiceps, is listed as ‘CRITICALLY ENDANGERED’ on the IUCN Red List of Threatened Species™. Continue reading

IUCN Species of the Day: Jamaican Iguana

Posted in IUCN Species of the Day with tags , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , on July 26, 2011 by Bush Warriors


The IUCN Red List of Threatened Species(tm)
Jamacian Iguana

Photo credit: Eladio Fernandez


The Jamaican Iguana, Cyclura collei, is listed as ‘CRITICALLY ENDANGERED’ on the IUCN Red List of Threatened Species™. Continue reading

IUCN Species of the Day: Cuvier’s Hutia

Posted in IUCN Species of the Day with tags , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , on July 18, 2011 by Bush Warriors


The IUCN Red List of Threatened Species(tm)
Cuvier’s Hutia photo credit Eladio Fernandez

Photo credit: Eladio Fernandez


Cuvier’s Hutia, Plagiodontia aedium, is listed as ‘ENDANGERED’ on the IUCN Red List of Threatened Species™. Continue reading

IUCN Species of the Day: Tahiti Monarch

Posted in IUCN Species of the Day with tags , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , on July 11, 2011 by Bush Warriors


The IUCN Red List of Threatened Species(tm)

Photo credit: Ron Hoff


The Tahiti Monarch, Pomarea nigra, is listed as ‘CRITICALLY ENDANGERED’ on the IUCN Red List of Threatened Species™. Restricted to the west coast of Tahiti, this small flycatcher numbers fewer than 50 individuals – just 23 were counted in 2009. Continue reading

IUCN Species of the Day: Mountain Pygmy-Possum

Posted in IUCN Species of the Day with tags , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , on July 4, 2011 by Bush Warriors


The IUCN Red List of Threatened Species(tm)

Photo credit: Linda Broome


The Mountain Pygmy-possum, Burramys parvus, is listed as ‘CRITICALLY ENDANGERED’ on the IUCN Red List of Threatened Species™. Continue reading

Australia’s Western Ground Parrot: Will it Survive the Ravages of Introduced Predators and Bushfires?

Posted in Birds with tags , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , on January 28, 2011 by drsteveboyes

Very few people are aware of the Western Ground Parrot, an enigmatic and unusual bird that occurs only along the south coast of Western Australia.  Like many parrots in many parts of the world, this species is very close to extinction.

Photo credit: Brent Barrett, DEC

Western Ground Parrots are not as flashy as some parrots, but those lucky enough to have a close encounter with them can appreciate their gorgeous green and gold colours, flecked with black, and capped with a red splash across the forehead—and you do have to be very lucky to see one! In addition to being so rare, their colours provide excellent camouflage in their shrubby habitats, and their behaviour makes them difficult to find.

Can you spot the young bird in the picture below?

Photo credit: Brent Barrett, DEC

Rock Parrots and the Elegant Parrots, which are much more common in the area, are often mistaken for Western Ground Parrots because they also feed on the ground. However, they lack the red forehead and the fine black flecks.


Right: Rock Parrot (photo credit: Stephen Fryc); Left: Elegant Parrot (photo credit: Joan Bush)


Like many of the world’s rare birds, the Western Ground Parrot has not been well-studied. Its cryptic nature makes it a challenging species to work with.  In fact, despite searching, no nest has been found since 1913! However, in the past few years, some insights have been gained in the behaviour and breeding of these birds through radio-tracking and field observation.  Methods have also been developed to monitor population size. Additionally, recent genetic work has shown that it is actually a separate species from the ground parrots of Eastern Australia, after having been separated from each other for about two million years.


Team sets up an automatic recording unit (photo credit: Allan Burbidge, DEC)


The Recovery Project is overseen by the Recovery Team and contributed to by staff from Western Australia’s Department of Environment and Conservation (DEC), the Friends of the Western Ground Parrot, and many volunteers. In recent years, the team has observed a rapid decline in Western Ground Parrot populations, which has alarm bells ringing. According to Dr. Abby Berryman, one of the team members battling to save the species, there are likely now less than 140 birds in existence.

Juvenile Western Ground Parrot (photo credit: Alan Danks)

“The Western Ground Parrot could be facing imminent extinction, and could become the first contemporary bird extinction on the Australian mainland,” explains Dr. Allan Burbidge, a principal research scientists with the DEC.  “And to make it worse, we are concerned that the marked decline of the Western Ground Parrot in the 330,000 ha Fitzgerald River National Park, in the heart of a UNESCO Biosphere Reserve, could be a classic case of a ‘canary in the coalmine’.  This reserve is home to eight other listed threatened animal species and a host of rare or threatened plant species. We are concerned that the decline of Ground Parrots in this area may be suggestive of the threatening processes impacting on this landscape.”

The low shrubland vegetation that the Western Ground Parrot depends on is very prone to fires, which have regularly swept through the area, destroying the bird’s habitat.  Extensive bushfires, and those occurring too frequently, have been quite a challenge for managers entrusted with the protection of ground parrot habitat. Although these disasters remain an ever-present risk, the managers’ many hours spent in collaboration with the recovery team and volunteer data collectors has yielded improved fire management.  However, it is now becoming clear that fire alone has not been responsible for the decline of this species.


Bushfires can render habitat unsuitable for a number of years (photo credit: David Chemello, DEC)


Though the Ground Parrot can fly well, it feeds, roosts, and nests on the ground, making it vulnerable to introduced predators, such as cats and foxes.  These skilled predators were brought to Australia from Europe and have wreaked havoc on the native fauna. It would seem a simple thing to do would be to just go out and control the numbers of these animals, but it’s not that simple in practice. First, the animals themselves are cunning, and often avoid traps or baits. Second, the removal of predators can have unforeseen consequences, including unpredicted changes in numbers of prey species, some of which might compete with the species we want to conserve.

Photo credit: Brent Barrett, DEC

“We are doing our best to unravel this puzzle, but it is proving extremely difficult to pull together sufficient resources to implement this ambitious program of integrated predator control and monitor the results,” says Sarah Comer, Chair of the recovery team.


Researcher, Abby Berryman, with a Western Ground Parrot caught for radio-tracking (photo credit: Arthur Ferguson)


We now realize that we need to come to grips with the impact these predators are having on Ground Parrot populations, and what the consequences might be if they are not removed. Understanding the influences on the endangered birds’ population size can best happen through controlled experiments and careful documentation. There can be no quick fix for this exacting work.  It is slow, but at the same time urgent.  Additionally, control of feral predators and setting up a captive breeding program will not come cheap.  Currently, this species is listed under the Australian Commonwealth’s Environment Protection and Biodiversity Conservation Act (1992) as Endangered, but a nomination to change the classification to Critically Endangered is now being considered.


Measuring a Western Ground Parrot as part of ongoing research (photo credit: Neil Hamilton, DEC)


Brenda Newbey, Chair of Friends of the Western Ground Parrot says, “The Western Ground Parrot is a feisty survivor. Our community group is doing its best to support the Recovery Team but we are extremely concerned that insufficient funding will hamper efforts to conserve this unique species. However, we do strongly believe that with help now, the Western Ground Parrot can make a comeback.”

Photo credit: Brent Barrett, DEC

This means that you can help the Western Ground Parrot! Please visit the website of the Friends of the Western Ground Parrot (click here) to find out more about this unique bird.  Or click here to make a donation.

Photo credit: Brent Barrett, DEC

Watch as biologist Brent Barrett leads us through the activities of the rarely observed Western Ground Parrot (Pezoporus flaviventris):

The Western Ground Parrot was featured in Bush Warriors’ “Saying Hello: Ten New Species Discovered in 2010”, after it was found to be a genetically distinct species from the Eastern Ground Parrot.  Click here to see the article!

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Not Another Dodo: The Success of Saving the World’s Most Endangered Parrot

Posted in Birds with tags , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , on January 14, 2011 by drsteveboyes

In the late 1980s, the Mauritian Parakeet (Psittacula eques), also called the Echo Parakeet, was considered the most endangered parrot on earth.  By that time, researchers, who had become really good at finding them, could only account for four or five pairs in the wild. These emerald green parakeets are only found on the island of Mauritius in the Western Indian Ocean, and 30 years ago you would have been extremely lucky to see one or two pairs fly over the Black River Gorge. It was clear then that this species was teetering on the brink of extinction, along with several other Mauritian endemics.

Photo credit: Gregory Guida

Many mainstream conservation funds and authorities didn’t want to invest in what they saw as a certain failure, effectively writing off the Echo Parakeet as a nonviable species, even though they were still holding on. Then stepped in the Mauritian Wildlife Foundation (MWF), Durrell Wildlife Conservation Trust, and World Parrot Trust. To ensure there would be no more species lost from this island, made famous by the extinction of the Dodo in 1690, a team of dedicated people banded together with the National Parks and Conservation Service. It was a unified effort that included people like Carl Jones, Vikash Tatayah, Mike Reynolds, Heather Richards, and many other researchers, collaborators, volunteers, and conservationists.

 Illustration via

The last remaining Mauritian parakeets were challenged a chronic lack of suitable nesting trees, unprecedented nest predation by a booming population of introduced black rats, ceaseless human disturbances, feral pigs and deer, and staunch competition with the more plentiful and aggressive Rose-ringed Parakeet (Psittacula krameri) introduced by the island’s immigrants. By the late 1970s, the two to four Echo Parakeet pairs remaining in the wild were gravely threatened by heightened vulnerability to disease outbreaks and tropical cyclones, which made every year a nerve-wracking experience for those concerned with the future of this species.

 Echo Parakeet nesting box (photo credit: Dennis Hansen)

After successful captive breeding efforts, the MWF and its partners made a bold decision in the 1990s to launch intensive population management measures. Captive-bred Echo Parakeets were released and provided with artificial nest boxes and supplementary feeding stations.  Captive-bred chicks were also introduced to nest boxes, and so began the process of rebuilding a viable population. By 2010, they had achieved a population of 500 Echo Parakeets (a total of 550 Echo Parakeets expected in February 2011)!  A huge conservation milestone and a wonderful story!

Captive-bred chicks (photo credit: Heather Richards) 

Vikash Tatayah from the MWF says that, since 1984, the Mauritius Kestrel, Pink Pigeon, Rodrigues Warbler, Rodrigues Fody and Echo Parakeet have been saved from extinction. This means that Mauritius has saved more species than any other country in the world.  Even more than New Zealand and the United States (including Hawaii), which have each saved four species from the point of no return. The MWF and its partners have also prevented the loss of numerous plant species and have worked hard to restore native forest habitats, establishing Mauritius as a leader in endangered species conservation. Yet, Vikash points out: “There is still a lot more to do!”.

Mauritius Kestrels (photo via World Parrot Trust)

Today, the Echo Parakeet is restricted to a remnant of native forest that comprises less than 40 square kilometers (15 square miles) of the Black River Gorge National Park. Like most endangered parrots, they saw their limited forest habitat degraded and broken down until they were forced to seek new food resources and nesting sites in habitat that simply couldn’t support them.  Now, only 1% of their natural habitat remains.

Photo via World Parrot Trust

We must continue to support the species until the forest habitat they depend on has been rehabilitated. Threats posed by nest predation, competition with honeybees, and further habitat destruction have been controlled.  However, we now face the ominous arrival of Psittacine Beak and Feather Disease (PBFD), which has already begun to reduce body weights in healthy Echo Parakeets and has seen featherless birds unable to survive in the wild. Many have died from the disease and the international community in parrot research and conservation is working feverishly to combat this debilitating “Doomsday Virus” for endangered parrots around the world.


Echo Parakeet infected with PBFD (photo credit: Elaine Fraiser)


The World Parrot Trust will continue supporting what is widely recognized as the most successful parrot conservation program ever undertaken.  To read more about these magnificent birds, please click here.

Photo via World Parrot Trust



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