White-winged Flufftail CRITICALLY ENDANGERED

The White-winged Flufftail is one of the world’s most threatened and rarest birds. Destruction and degradation of the species high altitude wetland habitat have resulted in a situation where its survival in the wild is uncertain. There is a race against time to ensure that it does not become the first African bird to go extinct, following the same fate as North America’s Passenger Pigeon and Mauritius’ Dodo. Through the use of a novel survey method, BirdLife South Africa’s research team has recently revealed the first breeding records for South Africa, contradicting prior thought that the White-winged Flufftail is a non-breeding visitor to South African wetlands.

Our recent discoveries about the White-winged Flufftail

First Breeding Record for South Africa

First Breeding Record for South Africa

White-winged Flufftail is only known to occur with any regularity in Ethiopia and South Africa, more than 4000 km apart. The species is found in South Africa from November to March and it inhabits high altitude wetlands in the eastern parts of South Africa. The species breeds in the northern hemisphere during July to August. Prior to the recent discovery, the only known breeding site was Berga Wetland in Ethiopia.

Over the past two years BirdLife South Africa’s Robin Colyn and ecologist Alastair Campbell have developed an innovative method to survey this cryptic and elusive species. Dubbed the BirdLife South Africa Rallid Survey Method (Colyn et al. 2017, Ostrich 88: 235-245), it uses a cleverly designed camera trap system to record the secret life of the White-winged Flufftail. Working at Middelpunt Wetland near Belfast, in 2016/17 they recorded interesting wing-flapping behaviour during which both males and females display their white wing feathers. In 2017/18, the survey technique was further refined. The most exciting discovery was photographing recently hatched chicks and juvenile White-winged Flufftails. At least two breeding attempts were recorded, with chicks ranging from only a couple of days old to juvenile birds which were about four weeks old. This confirms that the White-winged Flufftail is not a “non-breeding visitor” to South Africa, says Robin Colyn, one of BirdLife South Africa’s ornithologists and lead on the development of the novel survey method.

A second breeding record was confirmed at Middelpunt Wetland in January 2019 making it the second year in a row with confirmed breeding events for this species. This provides stronger evidence to the theory that the species is breeding in South Africa more regularly. We are still unsure what our findings mean for White-winged Flufftail conservation. The survey method did however confirm a low abundance and therefore, until further knowledge, our assumption holds that this species is extremely rare and it remains on the brink of extinction.

Camera trap footage of three chicks and a female White-winged Flufftail moving through the Middelpunt Wetland – the first ever evidence that this species breeds outside of Berga Wetland, Ethiopia. Photo: Colyn et al. 2018)

First confirmation of their call

First confirmation of their call

One of the greatest ornithological mysteries, representing more than a decade’s work, has been solved! The species was first discovered and described in 1877 by Thomas Ayres and John H. Gurney. However, since its discovery over 140 years ago, numerous aspects of its ecology, behaviour and status have largely remained veiled in mystery. The gaps in our understanding related to this species are such, that it is one of the only southern African bird species for which we do not have an undisputed record of its call.

In February 2018, a call was identified by Robin Colyn through the acoustic monitoring system at a South African wetland that did not match any known calls on record. The unknown call corresponded to photographs taken simultaneously by carefully placed camera “traps”. These photos showed a male White-winged Flufftail exhibiting territorial behaviour. Robin Colyn explains “The call was unique in that it differed significantly from most other flufftail species and occurred within an extremely low frequency range, making it very difficult to distinguish amongst the wetland soundscape of other birds and frogs”.

Further scrutiny of the very large dataset of bird recordings yielded more than a dozen such records and provided the foundation that was used to solve one of the greatest ornithological bird mysteries in Africa. In August 2018 the soft staccato clicking that is now attributed to White-winged Flufftail was also successfully recorded in the breeding grounds in Ethiopia and has confirmed this vocalisation on both extremities of the species’ range in Africa by the BirdLife South Africa team (Robin Colyn, Dr Melissa Whitecross and Caroline Howes).

The breakthroughs achieved are crucial in informing our understanding of the conservation status and requirements of this threatened species. As a result, BirdLife South Africa is able to more efficiently direct conservation efforts and resources to promote the persistence of this species across the continent.

Juvenile White-winged Flufftail Release - Photo: PhilipStapelberg

BirdLife South Africa’s White-winged Flufftail Project

White-winged Flufftail Male. Photo: Miona Janeke
White-winged Flufftail male. Photo: Arno Ellmer

Summary

The White-winged Flufftail is a small, elusive bird and is one of nine flufftail species in Africa. They are only known to occur, with any regularity, in the high-altitude wetlands of South Africa and Ethiopia. The White-winged Flufftail is listed as Critically Endangered by the IUCN and considered to be on the brink of extinction. It is one of South Africa’s rarest birds, and it is estimated that there are only 50 birds left in South Africa, and perhaps as few as 250 remaining throughout its global range. Its preferred habitat is severely threatened by habitat degradation and destruction.

BirdLife South Africa, Middelpunt Wetland Trust and the BirdLife partner in Ethiopia, the Ethiopian Wildlife and Natural History Society, are raising the profile of the ‘Critically Endangered’ White-winged Flufftail and are mapping out a conservation plan for the species. Find out more about the project below.

Biology

Biology

It is one of nine flufftail species, a family related to crakes and rails, and all are small, secretive, ground-living birds that typically reveal their presence only by their ghostly hooting calls.

The White-winged Flufftail is an endemic resident to Africa and is only known to occur in high altitude wetlands of South Africa and Ethiopia. Ten years ago the South African population, was estimated at 235 non breeding individuals occurring in ten sites ranging from 50–1,000 ha in area and at altitudes of 1,300 – 1,870 m in the east of the country.  The only known breeding population, estimated at  200 pairs maximum is found at three sites in highland marshes in the central highlands of Ethiopia near Addis Ababa. More recent estimates show that there is a mere 50 birds left in South Africa and less than 250 globally.

White-winged Flufftails are small, almost mouse-like birds weighing a mere 30-35 grams according to published literature. Birds recently weighed in Berga wetland, Ethiopia, by the BirdLife South Africa research team weighed between 25 and 35g, averaging a mere 30g. They are streaked, with brownish plumage, a rusty head, chest and tail, a wingspan of about 16 cm, and broad characteristic white secondary wing feathers that briefly render them conspicuous in flight.

Habitat

Habitat

White-winged Flufftails have specific habitat needs. In Ethiopia they favour seasonal flooded wetlands, stretches of grass and sedge standing about knee-height in ankle-deep water in summer. In South Africa, by contrast, the wetlands used by these flufftails are permanently or semi-permanently wet, and they are typically sponges located near the headwaters of rivers in the eastern Highveld, which are wet underfoot, and dominated by the sedge Carex acutiformis, a broad-leafed plant that forms a closed canopy about 1-1½ m high above the ground layer of damp ground or shallow water.

The presence or absence of the birds here seems linked to water-level – they are absent when it is too deep or too dry. Fire occurrence and grazing pressure might also play a role, but this still needs to be tested by a field experiment. Much remains to be learnt about this bird’s habitat requirements and guesswork needs to be replaced by fact.

BirdLife South Africa’s Robin Colyn is using a combination of ground-truthing surveys and detailed, fine-scale ecological niche modelling and remote sensing techniques to find potential sites for this species across its range. His work is pushing through the boundaries of what we knew about this elusive species.

Threats

Threats

Wetlands are South Africa’s most threatened ecosystem according to the South African National Biodiversity Assessment in 2011. White-winged Flufftails are listed as Critically Endangered in The Eskom Red Data Book of Birds of South Africa, Lesotho and Swaziland (Taylor et al. 2015). In South Africa, they are severely threatened by habitat destruction and degradation, including impacts of mining activities, wetland drainage, various agriculture-related activities including crop farming, afforestation, grazing, water abstraction, horticulture, peat fires, draining, erosion, siltation, fences and developments such as roads, dams and buildings. Its habitat is believed to be undergoing a continuing decline, i.e. all potentially suitable White-winged Flufftail wetland habitat around Durban has been destroyed as a result of intensive agriculture (especially sugarcane farming), industrialization and the proliferation of human settlements.

The marshes occupied by the breeding population in Ethiopia are intensively grazed and threats include trampling and grazing by livestock and cutting of marsh vegetation for fodder. Livestock numbers are increasingly growing and the resultant grazing severely reduces the sward length in breeding habitat. Grasses and sedges are also cut for the culturally important Ethiopian coffee ceremony.

The Middelpunt Wetland and the Middelpunt Wetland Trust

The White-winged Flufftail was discovered in Middelpunt wetland in 1981. The bird was not seen at this site again until 1990 when a group of birders, including Deon Coetzee, went to search the marsh for the bird. A single bird was flushed. The fact that the bird was only known to occur at three sites in South Africa, together with the almost total lack of scientific knowledge about it caused great concern. This led Deon Coetzee to start negotiating with the owner of the farm to lease the wetland to enable constructive conservation action and research to be conducted. Deon initiated the Middelpunt Wetland Trust in 1994 to create a formal vehicle for this work. In 1995 the trust entered into a ten-year lease with the landowner.

The Trust is currently administered by BirdLife South Africa. The Trustees are:

  • Roger Wanless (Chairperson)
  • Malcolm Drummond
  • Adam Riley
  • Mark Anderson
  • Dr Hanneline Smit-Robinson
Middelpunt Wetland Photo: Morné Fourie

AEWA (African- Eurasian Waterbird Agreement) White-winged Flufftail International Working Group

Attendees of 2nd meeting of the AEWA White-winged Flufftail International Working Group which took place on 10 and 11 August 2015 in Addis Ababa, Ethiopia.

The role of the AEWA White-winged Flufftail International Working Group is to coordinate and catalyse the implementation of a 10-year action plan: the International White-winged Flufftail Single Species Action Plan (ISSAP), developed in 2008. During the 2015 meeting held in Addis Ababa, a 3 year Implementation Plan (2015 – 2018), based on the ISSAP, was developed. HSR has been appointed as the coordinator of the AEWA White-winged Flufftail International Working Group.

White-winged Flufftail National Working Group

The Department of Environment, Forestry and Fisheries initiated a White-winged Flufftail National Working Group in 2017. Discussions at the annual National Working Group meetings are mainly focused around the actions highlighted within the AEWA International Single Species Action Plan (ISSAP) 2008 as well as the Implementation Plan of the ISSAP which was developed at the 2nd International Working Group meeting in Addis Ababa, 2015

Research

Despite efforts over the last few years by conservationists, there is still very little known about the White-winged Flufftail.

BirdLife South Africa and Middelpunt Wetland Trust are currently focusing their research and conservation efforts on the following International Single Species Action Plan (ISSAP) actions:

  1. To limit and reverse habitat destruction and degradation at all sites

  2. To determine if there are multiple populations of the species

  3. To determine the habitat requirements and preferences

  4. To establish the extent of the species’ range and distribution

  5. To determine the species’ breeding biology

  6. To understand key ecological determinants influencing the species’ population dynamics

  7. To increase awareness at all levels

1. Conduct surveys of suitable wetland habitat in South Africa

Greg Davies completed in-depth surveys of known and potential White-winged Flufftail sites across South Africa during the summer of 2013/2014.

  • Davies GBP, Smit-Robinson, HA, Drummond, IM, Gardner B, Rautenbach S, van Stuyvenberg, D, Nattrass C, Pretorius M, Pietersen DW, Symes CT. 2015. Review of recent records of the White-winged Flufftail Sarothrura ayresi (Aves, Sarothruridae) in South Africa, including details of a survey of high-altitude wetlands in 2013-2014. Durban Natural Science Museum Novitates 37: 62-75.
2. Genetic sequencing to unravel the migratory connection

Through collaboration with the National Zoological Gardens (National Research Foundation) and the University of the Witwatersrand, research is being undertaken to understand the migratory connection, if any, between the populations of White-winged Flufftail in South Africa and Ethiopia. In addition, further genetic sequencing and analyses will help to enhance future research and conservation action.

August 2013: The White-winged Flufftail research team, including Hanneline Smit-Robinson, Craig Symes, Brett Gardner and Malcolm Drummond, travelled to Ethiopia and managed to take blood and feather samples for genetic and isotope studies from seven White-winged Flufftail in Berga wetland.

September 2013: A White-winged Flufftail was reported from King Shaka airport on 5 September. After more than 100 years without any new confirmed sightings, apart from a record by B. Taylor of a White-winged Flufftail in coastal wetlands at Mfabeni, St Lucia, KwaZulu-Natal, scientists started to dispute the records of White-winged Flufftail found in the vleis around Durban.  However, the observations of A. Millar were confirmed when Marius van Rooyen, Senior Wildlife Control Officer, reported that a flufftail has been found on site in the high security areas at King Shaka airport.  An airport staff member found the bird alive alongside a close-mesh fence along a road lining the main runways about 09h00 in the morning and handed it over to the Wildlife Control staff. The Wildlife Control staff took it to their office where it was photographed.  Being unsure about the species identification, they forwarded photos to David Allan, Curator of Birds at the Durban Natural Science Museum.  The bird was released at the site where it was found two hours later and before David Allan could open the photographs. The bird was positively identified as White-winged Flufftail.  In an attempt to relocate the bird for a blood and feather sample to be taken, the surrounding grasslands/damp wetlands has subsequently been searched without success.

December 2013: While undertaking a survey of the wetland at Middelpunt Greg Davies, ornithologist at the Ditsong Museum in Pretoria and currently contracted to do the wetlands surveys over the summer of 2013/2014, flushed a White-winged Flufftail at the Middelpunt wetland near Dullstroom. Two attempts at trapping the bird subsequently took place, but were unsuccessful.

January 2014: A male White-winged Flufftail was unexpectedly caught in a mistnet by Dirk van Stuyvenberg at Wakkerstroom. At long last blood and feather samples from a South African bird were collect, enabling us to solve the mystery of the migratory connection between South Africa and Ethiopia.

February 2014: A second bird was successfully netted and sampled at the farm Middelpunt near Dullstroom. This sample, along with other samples taken in South Africa and Ethiopia, has been submitted for DNA and isotope analyses and we are eagerly awaiting the results.

August 2015: A subsequent three blood and feather samples were collected from White-winged Flufftails in Berga wetland by the research team.

November 2016: Prof. Antoinette Kotzé and her team has been involved in scientific research to unravel the mysteries of the White-winged Flufftail.To date, no studies on immunogenetic variation in the White-winged Flufftail have been undertaken and this study is likely the first to describe the Toll-like receptor genetic diversity in a Critically Endangered species. The paper, entitled, “Lack of diversity at innate immunity Toll-like receptor genes in the Critically Endangered White-winged Flufftail (Sarothrura ayresi)”, confirms low genetic diversity in the innate immune regions of the White-winged Flufftail similar to that observed in other bird species that have undergone population bottlenecks. The species is thus likely to be more vulnerable to changes in the environment, e.g. exposure to a new disease. It is critical that the conservation and research currently conducted be continued and that the habitat for the White-winged Flufftail be protected from any additional human impacts.

September 2017: A third genetic paper published. The complete mitogenome sequence of the species was determined. The White-winged Flufftail mitogenome constitutes the first whole mitochondrial genome entry within the Sarothruridae family. The size of the genome is reported as 16,767 bp and comprises 13 protein-coding genes, 2 rRNAs and 22 tRNAs. This research is the first to confirm the relatedness (phylogenetic position) of the White-winged Flufftail to order species within the order Gruiformes (Figure 1). The organization of the genome of the species is comparable to that of other bird species.

Figure 1: Taken from Du Plessis et al. 2017. In order to evaluate its relative position within the order Gruiformes a phylogenetic tree (maximum-likelihood) was constructed to place the White-winged Flufftail among species representing the Rallidae, Gruidae, Heliornithidae and Otididae Families.

February 2018: BirdLife South Africa and National Zoological Gardens geneticists show that South African and Ethiopian birds are genetically similar, with only three minor sequence variations between the two populations (Dalton et al. 2018, African Journal of Ecology 56: 28-37).

This research is the first to confirm genetic connectivity between the South African and Ethiopian populations of White-winged Flufftail. In this study, analysis of mitochondrial (COI, Cytb, 12S/Val/16S) and nuclear (ADH-5, GPD3-5 and bfib7) markers was conducted for White-winged Flufftail samples from South African (n = 3) and Ethiopian (n = 7) birds, as well as Red-chested Flufftail for species comparison. Analyses of the DNA regions identified only three interspecific variations between the two populations, supporting the hypothesis that these two populations are not different species or sub-species but are rather one migrating population, having separate ranges during the different seasons in Ethiopia and South Africa respectively

List of peer-reviewed genetic publications:

  • Dalton DL, Smit-Robinson HA, Vermaak E, Jarvis E, Kotzé A. 2018. Is there genetic connectivity among the Critically Endangered Whited-winged Flufftail (Sarothrura ayresi) populations from South Africa and Ethiopia? African Journal of Ecology 56: 28-37.
  • Du Plessis M, Dalton DL, Smit-Robinson HA, Kotzé A. 2017. Next generation sequencing yields the mitochondrial genome of the critically endangered Sarothrura ayresi (White-winged Flufftail). Mitochondrial DNA Part B: Resources 2: 236–237.
  • Dalton DL, Vermaak E, Smit-Robinson HA, Kotzé, A. 2016. Lack of diversity at innate immunity Toll-like receptors genes in the critically endangered White-winged Flufftail (Sarothrura ayresi). Scientific Reports. 6: 36757–63665. DOI: 10.1038/srep36757
3. Rallidae camera trap study at Middelpunt and Ingula Wetlands

The rallidae family in a southern African context includes rails, crakes, gallinules, swamphens, moorhens and coots. The flufftail and crake genera are the smallest bodied and most elusive species within this family that generally forage on the ground, particularly the Sarothrura, Porzana, Rallus and Crex genera. Subsequently, their elusive, cryptic and ground foraging behaviour in often dense wetland vegetation have resulted in them being relatively difficult to accurately study. To date, the most widely utilized method of surveying these species have involved invasive forms of monitoring such as line transects and rope dragging surveys.

A very successful 2016/2017 rallidae camera-trap survey at the Middelpunt wetland delivered more than 13 independent sightings of the Critically Endangered White-winged Flufftail. This novel, non-invasive technique developed by BirdLife South Africa has yielded more successful and conclusive sightings of this elusive species than the previous eight years of human flush surveys combined. Additionally, the study highlighted numerous facets of the species biology and behaviour that have not been documented before.

A similar study has already been undertaken at Ingula during the autumn of 2016, to test the exact methodologies required in terms of camera height, angle and focal distance to be allowed to accommodate for optimal camera placement across varied wetland habitat structures. This study has been accepted for publication in the peer-reviewed scientific Journal of African Ornithology, Ostrich.

  • Colyn, RB, Campbell, A, Smit-Robinson HA. 2019. Camera-trapping successfully and non-invasively reveals the presence, activity and habitat choice of the Critically Endangered White-winged Flufftail Sarothrura ayresi in a South African high-altitude wetland. Bird Conservation International 1, 1-16.
  • Colyn R, Campbell A, Smit-Robinson HA. 2017. The application of camera trapping to assess rallidae species richness within wetland habitat types, eastern Free State, South Africa. Ostrich. 2017: 1–11 (ISSN 0030–6525)

Robin Colyn (KEM-JV Fellow of Conservation) has been instrumental in developing this technique with great input from Alastair Campbell.

Deployment of camera traps into Middelpunt Wetland. Photo: Carina Coetzer
4. Construct a research facility for detailed study of the White-winged Flufftail

A research facility for the captive breeding of White-winged Flufftails will be constructed with input from Mr Colin Wintle, the current world expert on the captive keeping of crakes, rails and flufftails. A handful (< 10) of Red-chested Flufftails (a closely related species with similar habitat requirements to White-winged Flufftails) will be obtained in South Africa under the necessary permits and with the private landowners’ permission. The Red-chested Flufftails will be kept at the facility at the National Zoological Gardens in Pretoria and will be used to master the flufftail’s needs in captivity and serve as an attraction to raise the profile of the flufftail and wetland conservation.

Only once the keeping of Red-chested Flufftails is mastered will White-winged Flufftail be introduced to the facility. The research facility will allow researchers to study the biology and behaviour of this enigmatic species, as well as attempting to record the call of the White-winged Flufftail. Authenticity of the existing recordings of the bird is in doubt.

The construction of the Flufftail Research Facility is estimated at R1.2 million. A large part (about R400 000) will be funded through current donors who have already indicated their contribution to the construction in costs and labour. The outstanding amount on the “barometer” has now been reduced to R550 000 given the cost saving and the additional funds raised.

Project Collaborators:

  • National Zoological Gardens, Pretoria
  • BirdLife South Africa
  • Middelpunt Wetland Trust
  • University of Pretoria: Research on behaviour and other unknown aspects of the birds to be done in collaboration with Prof. Andrew McKechnie and his students.
  • Rockjumper Worldwide Birding Adventures
  • Eskom (funding towards running costs)
5. Foster community support in Ethiopia

The Middelpunt Wetland Trust has long understood the need to protect the vegetation at the Berga breeding site against overgrazing and grass cutting during the July/August breeding season. As a means of gaining the support of the local community, the Trust has provided financial support over the past ten years for the building of a school for the community. The newest school block was made possible through the generous support of Rockjumper Birding Tours. Prior to this, the nearest school was eight kilometres away. Today, 700 children receive their primary school education in the village. Well aware of the value of the flufftail to the community, the site support group patrols the wetland during the breeding season to prevent grazing and grass cutting.

August 2013: Hanneline Smit-Robinson and Malcolm Drummond met with the school committee to discuss progress and future plans.

February 2013: More than R33,000 was raised for the Local Concervation Group during public viewings of the White-winged Flufftail at Middelpunt.

February 2017: A remarkable R42 000 was raised towards the sustenance of the local Site Support group at Berga wetland, Ethiopia through a public viewing arranged at Middelpunt wetland as part of the Dullstroom Flufftail Festival that was held at Dullstroom. BirdLife South Africa and Middelpunt Wetland Trust developed a joint position statement regarding our views about public flushing events in wetland habitats.

Please see BirdLife South Africa position statement about the flushing of birds here.

White-winged Flufftail Photo: Warwick Tarboton

What you can do to help

Donate towards the expansion of research and conservation on the White-winged Flufftail and the wetlands which they inhabit. Anyone wishing to donate towards this important conservation work can either deposit funds directly to BirdLife South Africa (FNB, Acc No: 62067506281, Branch: 250655) using the reference WWF_YourInitials&Surname, or can use the online payment platform accessed via www.birdlife.org.za/support-us/donate where the White-winged Flufftail tab can be selected as the chosen cause.

Seen a Flufftail? Please report all sightings of flufftails (including White-winged Flufftail) to Dr Hanneline Smit-Robinson, Terrestrial Bird Conservation Programme Manager (Oppenheimer Fellow of Conservation) at conservation@birdlife.org.za or 011 789 1122.

A word of thanks to our sponsors

All research is made possible through the generous support of The Ingula Partnership, Airports Company South Africa and Department of Environmental Affairs. Further support is received through several donors including Rockjumper Worldwide Birding Adventures, BirdLife International, Dullstroom Trout Farm, Escarpment Bird Club and others.

Meet the Team

Dr Hanneline Smit-Robinson, Malcolm Drummond, Dr Brett Gardner
Robin Colyn & Alastair Campbell

All research is made possible through the generous support of The Ingula Partnership, Airports Company South Africa and Department of Environmental Affairs. Further support is received through several donors including Rockjumper Worldwide Birding Adventures, BirdLife International, Escarpment Bird Club and others.

Prof Antoinette Kotze
Craig Nattrass
Dr Melissa Whitecross

For more information contact:
Dr Hanneline Smit-Robinson
Manager: Terrestrial Bird Conservation Programme/Oppenheimer Fellow of Conservation, BirdLife South Africa
email: conservation@birdlife.org.za
phone:

or
Robin Colyn
KEM-JV Fellow of Conservation, BirdLife South Africa
Email: robin.colyn@birdlife.org.za
Phone: 076 833 8454

Scientific publications:
1. Colyn, RB, Campbell, A, Smit-Robinson HA. 2019. Camera-trapping successfully and non-invasively reveals the presence, activity and habitat choice of the Critically Endangered White-winged Flufftail Sarothrura ayresi in a South African high-altitude wetland. Bird Conservation International 1, 1-16.

2. Colyn R, Campbell A, Smit-Robinson HA. 2017. The application of camera trapping to assess rallidae species richness within wetland habitat types, eastern Free State, South Africa. Ostrich 88: 235-245.

3. Dalton, DL, Smit-Robinson, HA, Vermaak, E, Jarvis, E, Kotzé, A. 2018. Is there genetic connectivity among the Critically Endangered Whited-winged Flufftail (Sarothrura ayresi) populations from South Africa and Ethiopia? African Journal of Ecology 56: 28-37.

4. Vermaak, E, Dalton, DL, Smit-Robinson, HA, Kotzé, A. 2018. Assembling the tree: molecular phylogeny of Flufftails in Southern Africa. Submitted.

5. Du Plessis M, Dalton DL, Smit-Robinson HA, Kotzé A. 2017. Next generation sequencing yields the mitochondrial genome of the critically endangered Sarothrura ayresi (White-winged Flufftail). Mitochondrial DNA Part B: Resources 2: 236–237.

6. Dalton DL, Vermaak E, Smit-Robinson HA, Kotzé, A. 2016. Lack of diversity at innate immunity Toll-like receptors genes in the critically endangered White-winged Flufftail (Sarothrura ayresi). Scientific Reports. 6: 36757–63665.

7. Davies GBP, Smit-Robinson, HA, Drummond, IM, Gardner B, Rautenbach S, van Stuyvenberg, D, Nattrass C, Pretorius M, Pietersen DW, Symes CT. 2015. Review of recent records of the White-winged Flufftail Sarothrura ayresi (Aves, Sarothruridae) in South Africa, including details of a survey of high-altitude wetlands in 2013-2014. Durban Natural Science Museum Novitates 37: 62-75.