Species News

As part of the outreach programme in South America, WDCS has partnered with the Natutama Foundation. They are a grass roots NGO based in Puerto Nariño, in the Colombian Amazon and work in close cooperation with a local indigenous community. Together, Natutama and WDCS are improving communication with local communities and creating a culture for conservation within them. This requires a long term shift in attitude and approach to wildlife and resources and a greater understanding of threats to them. It also needs involvement of the local community and a will to change behaviour patterns in order to conserve and protect wildlife and habitats.

The community-based conservation model developed by Natutama has resulted in some significant successes for wildlife conservation in the Puerto Nariño region. There is now an increased awareness and concern for more careful management of natural resources in the Amazon and an understanding of how this can benefit their own lives as well as the wildlife.

The location of this project in Puerto Nariño is important as it is on the border area between Colombia, Peru and Brazil. The potential to influence Amazon areas beyond Colombia is clear. WDCS and Natutama are currently exploring opportunities for working with communities living near the border in Peru and Brazil where there are huge threats to wildlife (including hunting river dolphins and manatees). It is an area of great natural beauty and is home to many important natural resources.

Our experiences working in Puerto Nariño over the last few years have shown us that locally-led conservation actions are clearly a very effective way of ensuring Amazon habitats and ecosystems are sustained and protected. In the long term we would like to roll out this community based conservation model throughout the Amazon region. In this manner, WDCS and Natutama can help instill a culture of conservation within the communities, not only for the short term, but for many generations to come.



Some of the key project activities include:

• Promote conservation values and practice with children and their communities through regular educational outreach work.
• Facilitate the preservation of traditional knowledge of animals and plants through education amongst indigenous populations
• Deliver regular community events to promote the heritage and sustainability of the Amazon
• Increase independence of fishermen and educators to forge a culture of conservation among local communities and visitors to the area
• Develop leadership amongst local educators and fishermen
• Deliver conservation messages and strategies through local tourism

WDCS also partners with the Omacha Foundation in Colombia. Omacha is a well-established national NGO with an Amazon conservation programme. Omacha was instrumental in organizing the 1st workshop in Bolivia in order to create the regional Action Plan for South American River Dolphins. They play an important role in networking with others throughout the region working on river dolphin conservation. Omacha’s main focus involves working with NGOs and individuals to develop national action plans for river dolphins in Bolivia, Peru, Ecuador and Brazil.

Educational and well managed river dolphin watching schemes are also of particular importance to the organization. Not only does it provide a way for Amazonian communities to generate income from tourism, it also provides more incentives for the governments to implement conservation policies for river dolphins throughout the region.

Omacha also promotes sustainable fishing practices in the Amazon through the negotiation of fisheries agreements with communities and local authorities. There is a serious danger of habitat degradation and the ultimate collapse of important fisheries throughout the region. Their aim is, therefore, to promote sustainable fishing and to conserve the fisheries in the Amazon for many years to come.

River dolphins inhabit third world countries (in South America and Asia), where large and often poor populations of people live by rivers and lakes, and share the same habitat Solutions to problems faced by river dolphins also need to address the needs of local people to survive and thrive in the same environment.

The South American Action Plan for River Dolphins 2010 – 2020

In 2008, WDCS supported an important South American regional river dolphin workshop which took place in Bolivia. The workshop brought together conservation biologists, educators, researchers and some policy makers working on river dolphin issues from all range states. The workshop has resulted in a regional action plan for river dolphin conservation. Follow up work is now being done to develop national river dolphin action plans for each country, to express in more detail actions and measures needed to protect river dolphins locally.

The Action Plan was published in July of 2010 and has been presented at international meetings in Bolivia, Brazil and Colombia. It is widely available in both pdf and hard copy in Spanish and English. The Action Plan is available for download on the WDCS website (beware it is 250 pages long)



The Action Plan for River Dolphins explores the conservation issues facing river dolphins throughout South America. Recommendations are made and priorities identified to better understand and address these problems and ensure the future survival of the dolphins in healthy environments.

The objectives of the action plan follow five strategic lines:

• Scientific Research Contributing Towards Conservation such as population studies, taxonomy and habitat degradation measurement
• Legislation and Policy - Improvement on existing protection laws in all countries
• Communications - Improve dissemination of information between researchers, general public and media
• Administration and Institutional Strengthening - Improve management and administration in all countries, particularly concerning financial resources
• Education and Community Participation - Improve environmental education programs and involve local communities in all stages of action plan

Throughout the region the most urgent threats to river dolphins are hunting for fish bait and accidental deaths in fishing nets (negative interactions with fisheries), impact of gold mining and dam construction.

WDCS is now working with individuals and NGOs in South America to implement the recommendations in the Action Plan. This work requires a considerable amount of financial support and we are looking at ways to raise the funding we need to progress and fund vital conservation work in South American Countries.

What is WDCS doing to save river dolphins?
?For some 20 years, WDCS has continuously supported river dolphin conservation projects and initiatives partnering people and NGOs working in their own countries in South America and Asia.

Following the catastrophic extinction of the baiji, WDCS is redoubling efforts to prevent the worlds surviving river dolphins following the baiji down the road to extinction. Essentially WDCS needs to work hard to secure funding for this area of work which is a huge commitment of our staff resources. The implementation of conservation work to address threats to river dolphins and their habitats clearly needs to take place in developing countries of South America and Asia where funding for wildlife conservation is just not available. We need to raise money in Europe and other northern hemisphere countries.

WDCS has already had some fundraising success and we are already working with a number of NGOs and conservation biologists to support river dolphin conservation projects in Colombia, Bolivia and Brazil.

The most shocking threat in South America today is the deliberate killing of river dolphins for bait. Hand harpoons are used to hunt botos mainly in the central Brazilian Amazon. It is likely that thousands of dolphins are killed annually in this way. The hunting is illegal and it is a really serious threat to river dolphins. It is also a cruel hunt – dolphins are harpooned and killed, others are captured and tied up by their tails until they are needed for bait.

Dead river dolphins (and also caiman) are used as bait to catch fish that feed on dead animals – picacatinga or mota fish. The dolphin carcass is put in a large wooden slatted box and lowered into the river. The fish are attracted in large numbers to feed on the carcass and can easily be caught by fishermen working close to the wooden box. Traders subsequently purchase the fish and transport them to Colombia where the majority is sold in supermarkets in the cities.

People generally know that it is illegal to kill river dolphins but since the law enforcement is non-existent they are willing to take the risk and benefit from income generated by the fishery.

Entanglement in fishing gear has also been a major threat to boto populations for many years. The overfishing of the Orinoco and Amazon river basins has lead fishermen to use increasingly desperate techniques in order to catch enough, large fish. This variety of intrusive practices has increased the occurrence of conflict between river dolphins and fishermen. Seen as competition for the dwindling fish populations, the river dolphins have suffered much persecution over recent years. They are, however, not entirely blameless as they have been fighting back, often seen stealing and damaging fishing nets!

A variety of other threats also impact on South American river dolphin populations. Habitat degredation from deforestation and water pollution are major threats. Additionally, expanding dam projects throughout the river systems have isolated already vulnerable populations. This only increases the effects existing threats have on the surviving populations of river dolphins.

Community outreach programs are of paramount importance, as is the strengthening of protection legislation and its enforcement throughout the region. WDCS is working with NGOS and individuals in Brazil and Colombia to address these very urgent threats to river dolphins. Published in July of 2010, the Action Plan for the conservation of river dolphins in South America has mapped out the future for the conservation of the species. Read our next blog entry and find out how!

With today being "Valentine's Day" it's an appropriate time to introduce you to a group of dolphins who are in dire need of some love and protection ... the River dolphins! Over the next few weeks we'll be looking at the different species in more detail and telling you about some of the research being undertaken to help us learn more about these animals that really need our help but to begin with, here's a quick overview of the species considered "riverine".

There is a small, unusual group of dolphins that live exclusively in fresh water rivers and lakes. Unfortunately, these special dolphins are among the most endangered mammals on earth. Tragically, it is a river dolphin that is the only cetacean to have gone extinct in modern times at the hands of man. In 2007, the Chinese river dolphin, or baiji, was declared extinct. The baiji’s only home was the Yangtze River. Their demise was entirely due to the human impacts of habitat destruction and bycatch in fishing equipment.

Protecting River dolphins
River dolphins are emblematic species for rivers. This is because saving river dolphins means saving rivers. If river dolphins and their river homes can be protected, hundreds of thousands of other species, not to mention the local people dependent on supplies of fresh water, will also benefit.

Losing the baiji is a shocking early warning sign of the probable outcome for the surviving river dolphin species. Put very simply, if we do not do more to protect river dolphins and their river habitats, we will lose them forever. River resources, like all natural resources, are not inexhaustible and many impacts are not reversible. Once flagship species such as river dolphins start to disappear from stretches of river, it may already be too late to make amends.

Where are river dolphins found?
Today, river dolphins survive in two areas of the world; South America and Asia.
In South America, the Amazon river dolphin (also known as ‘boto’, ‘bouto’, ‘bufeo’ and ‘Inia’) and the tucuxi (sotalia) live in the Amazon and Orinoco river basins of South America.

In Asia, the Ganges river dolphin (susu) lives in the Ganges river basin of Nepal, India and Bangladesh, and the Indus river dolphin (bhulan) lives in the Indus river basin of Pakistan.

In addition, there are other dolphins who are not members of the river dolphin family living in freshwater habitats. These include small and isolated fresh water populations of Irrawaddy dolphins living in rivers and lakes of Cambodia, Laos, India, Vietnam, Thailand and Myanmar. The finless porpoise also inhabits freshwater regions of the Yangtze River in China.

Why are river dolphins in so much trouble??
River dolphins are particularly vulnerable because they are restricted to fresh water (rather than bigger areas of ocean) and are found in naturally low population numbers. They are extremely vulnerable to direct threats related to human activity and resource use. Many of the rivers they inhabit have become extremely important resources for large human populations. River dolphins therefore suffer majorly from human vs. wildlife conflicts.

Meet the River Dolphins
There are four families of river dolphin: 

1. Lipotes family



The baiji or Chinese river dolphin (Lipotes vexillifer) was the sole member of the Lipotes family and lived in the Yangzte River of China for some 20 million years. It is now extinct and tragically, this means an entire family of mammals is now gone forever. The baiji’s extinction is entirely due to human impacts; such as the ongoing degradation of its habitat, heavy ship traffic, pollution, human land uses as well as unsustainable fisheries and bycatch. It is the first large mammal to be driven to extinction by people in recent times. The baiji’s demise can only mean that the Yangzte River ecosystem and the people living there are in very serious trouble. The Yangtze River basin has a population of approximately 400 million people, equal to about one in 17 of all people on the planet! Sadly the baiji’s story is an early-warning sign of more extinction to come; unless action is taken to stop history repeating itself both in China, where the finless porpoise can still be found in the Yangzte River, and in other parts of the world.

2. Inia family

The Inia family includes the boto, or Amazon river dolphin (Inia geoffrensis), and the Bolivian river dolphin (Inia boliviensis), which both call South America home. The boto lives in the Amazon, Orinoco and Araguaia/Tocantins river systems of Peru, Colombia, Venezuela, Brazil, Ecuador and Guayana; whereas the Bolivian river dolphin is only found in Bolivia! Botos are the largest of all river dolphins (1.8 – 2.5m long). They have a hump on their back, rather than a well-defined dorsal fin, and a long narrow beak lined with teeth. Botos have 25-30 peg-like front teeth for catching prey and molars for crushing their food at the back of their mouths. They use echolocation to hunt and catch their prey and mainly eat fish (particularly catfish) and crustaceans. Their flexible neck vertebrae, unique to river dolphins, means they can move their necks up and down and from side to side. This gives them much greater maneuverability in the flooded forest. This maneuverability enables them to swim amongst trees and bushes that are underwater during the rainy season. They navigate over and under roots and branches, hunting and catching the fish that feed from seeds and berries. They are often seen swimming upside down, which may seem peculiar, however it is thought to be down to their overly chubby cheeks obstructing their downward vision! Botos are well-known for their unusual pink colouration. It is a beautiful and striking contrast to the often brownish coloured river water and green forest. The calves are usually born with greyish skin and most then become pinker with age. Adults can, however, vary in colour from grey to pink. The pinkness is thought to be due the presence of lots of blood vessels close to the surface of the skin but the reasons for adult colour variation are unknown.

The Bolivian river dolphin (Inia. g. boliviensis) lives only in Bolivia. An extensive drought in the Madeira region of Brazil between 100 and 500 thousand years ago resulted in Bolivian botos becoming separated from other botos by newly created and impassable rapids. The botos in Bolivia have therefore been isolated from other botos for such an extended period that they are now considered genetically distinct and are in the process of being classified as a different species of river dolphin. This clearly has huge consequences for river dolphin conservation. Protecting botos in Bolivia becomes that much more important as it means protecting an entire species.

3. Platanista family



The Platanista family includes the Ganges river dolphin of Nepal, India and Bangladesh, and the Indus river dolphin of Pakistan. There is an ongoing debate amongst scientists about whether these dolphins are separate species, or subspecies of the same species. One thing is certain, the Ganges and Indus River Dolphins are completely separated geographically. They are, however, identical in appearance. The body is a grey -brownish colour and stocky. They have a small triangular lump as opposed to a dorsal fin. Their flippers and tail are large in relation to the body size, which is about 2 to 2.2 meters in males and larger (2.4 to 2.6 m) in females. Their long, slender beaks characteristic of all river dolphins, are used to catch fast moving prey. These river dolphins do not have a lens in their eyes and so they are blind, although they can probably detect the intensity and direction of light. Instead of relying on sight, they use echolocation to hunt and navigate in the murky waters they inhabit. They feed on a variety of fish, including carp and catfish and shrimps. Both Ganges and Indus river dolphins are usually encountered in ones and twos or in loose aggregations; they do not form tight, obviously interacting groups.

The Ganges River dolphin or susu, was formerly distributed throughout the Ganges-Brahmaputra river system of Bangladesh, India and Nepal, and possibly Bhutan. Although it still has a fairly extensive range, its distribution has contracted, and its abundance has declined dramatically in some areas. Currently it is found in the Ganges-Brahmaputra-Meghna and Karnaphuli-Sangu river systems of Bangladesh and India. A few individuals survive in Nepal in the Karnali River and possibly the Sapta Kosi River. Its habitat is severely fragmented, and additional barrages continue to be built. Sadly, it is almost certainly declining in numbers.

The Indus river dolphin or bhulan is found only in the Indus river of Pakistan. It is classed as endangered by IUCN. It is one of the world’s rarest animals and is the rarest river dolphin (now that the baiji is extinct). Estimated overall numbers of animals surviving maybe as few as 1100 individuals and numbers are thought to be still declining. Historically it ranged from the Indus delta upstream to the Himalayan foothills. Currently the distribution of the Indus River dolphin is severely fragmented and dramatically reduced in extent. An estimated 99% of the Indus River dolphin population occurs in only 690 linear km (430 mile) segment of the river. Currently the Indus River dolphin is limited to three subpopulations in the Indus mainstream located between the Chashma and Taunsa, Taunsa and Guddu, and Guddu and Sukkur Barrages. The main reason for the decline of the Indus River dolphin was the construction of numerous dams and barrages, starting in the 1930s, that have fragmented the population and reduced the amount of available habitat. Another severe threat to the survival of the Indus River Dolphin is probably the increasing withdrawal of water used for the irrigation of farmlands around the river. Dolphins no longer occur in the lower reaches of the Indus because upstream water extraction leaves downstream channels virtually dry for several months each year.

4. Pontoporia family



The franciscana or La Plata River Dolphin (Pontoporia blainvillei) is scientifically grouped in the river dolphin family (its neck vertebrae are not fused and the beak is very long). However, the franciscana is not restricted to fresh water rivers and lakes; it is found in coastal Atlantic waters and estuaries of southeastern South America (Uraguay, Argentina and Brazil). Whilst some members of the species do spend portions of their lives outside of river systems, there are many individuals who live their entire lives within rivers, never venturing into the ocean proper. It is one of the smallest cetaceans and has the longest beak relative to its body size of all cetaceans. In fact the beak can account for almost 15% of its entire body length! Due to similar appearances it can be confused with the tucuxi (see below) but it is mainly their longer beak that sets them apart.

In common with other members of the river dolphin group, the franciscana has a restricted distribution. Gillnet fishing also has a two-fold impact on franciscanas. Bycatch rates through entanglement in gillnets are high but the damaging effects of trawling for franciscana prey species has also had a major impact on their habitat. The combination of these factors poses a very serious threat to the future of the franciscana.

5. Other Fresh Water Dolphins

There are a number of dolphin species that live permanently in freshwater rivers but are not scientifically related to the river dolphin family. These are oceanic dolphin species that have populations which solely live in fresh water – the tucuxi or sotalia, Irrawaddy dolphin and finless porpoise:

Tucuxi or Sotalia (Sotalia fluviatalis)

Sotalia can inhabit both marine and freshwater systems. They are classed as members of the oceanic dolphin family (Delphinidae) and look very much like mini bottlenose dolphins. The fresh water sotalia live in South American rivers and lakes of the Amazon and Orinoco basins. They exist along much the length of the Amazon River and many of its tributaries, and are found in Brazil, Peru, Colombia, and Ecuador. Amazon river dolphins and sotalia can often be found alongside each other in South American rivers and lakes. However, unlike the boto, sotalia do not enter the flooded forest during high water. They prefer to remain in the deeper water channels and lakes. The two species are not closely related genetically. Although the ranges of the marine and freshwater dolphins overlap, they are thought to be distinct species and may soon become classified separately. Whilst appearing almost identical, size can be a key distinguishing feature between the two with individuals in the marine population being up to 30% larger than their freshwater counterparts.

Irrawaddy Dolphins (Orcaella brevirostris)



Irrawaddy dolphins are largely oceanic dolphins that live in brackish water in river mouths, estuaries and coastal areas. However, there are a few established sub-populations of Irrawaddy dolphins entirely restricted to freshwater. They live in Asian rivers, including the Mekong in Laos and Cambodia, the Ayeyarwady River in Myanmar, the Mahakam River in Indonesia, Songkla Lake in Thailand and Chilka Lake in India. All of these populations, without exception, are very small and threatened with extinction.

Irrawaddy dolphins are grey, they have a large melon and a blunt, rounded head, and the beak is indistinct. They have a small, blunt, triangular-shaped dorsal fin. The flippers are long and broad. Adults grow up to 2.3m (8ft) long and weigh 130kg (287lb) kg. Threats include bycatch in monofilament gillnets used extensively in all rivers. Capture for captive display in aquariums in Asia is also a major threat.

Finless Porpoise (Neophocaena phocaenoides)

The finless porpoise lives in the coastal waters of Asia. They are most commonly found in the waters around India, China, Indonesia, Bangladesh and Japan. There is also a unique fresh water population (Neophocaena phocaenoides asiaeorientalis) surviving in the Yangtze River, China. The current population is just a fraction of its historical levels. A 2006 expedition estimated that fewer than 400 porpoises survived in the Yangtze River and it is heading for extinction. The same factors that recently drove the baiji to extinction are leading to the demise of the finless porpoise; habitat degradation and bycatch.