bluuebunny/crossref_metadata_2025_split huggingface dataset:
The rediscovery of the Red-tailed Newtonia Newtonia fanovanae in south-eastern Madagascar with notes on the natural history of the genus Newtonia
Authors: Goodman Steven M. , Schulenberg Thomas S. 
Published: May 2010

SummaryThe Red-tailed Newtonia Newtonia fanovanae, previously known from a single specimen from the eastern rainforest of central Madagascar, was rediscovered in October 1989 in the Marosohy Forest in the south-east of the island. In the study area, N. fanovanae occurs in the middle and upper section of the canopy of humid forest between 300 and 1,300 m. Ecological relationships with the other two sympatric Newtonia, amphichroa and brunneicauda, are discussed. The main morphological differences between fanovanae and the other two sympatric species are that the former has relatively long wings and short tarsi. The song of fanovanae is described and compared to other members of the genus. Our observations on the morphology, behaviour and vocalisations of N. fanovanae confirm its validity as a species.Le Newtonie à queue rouge Newtonia fanovanae jusqu'à presént uniquement connu d'un seul spécimen provenant de la partie orientale de la forêt tropicale du Madagascar central, fût redécouvert en octobre 1989 dans la forêt de Marosohy au sud-est de l'île. N. fanovanae fût rencontré dans les parties moyennes et supérieures du feuillage de la forêt humide entre 300 et 1,300 m d'altitude. Les relations écologiques avec les deux espèces sympatriques de Newtonia, amphichroa et brunneicauda sont discutées. Les différences morphologiques principales entre fanovanae et les deux espéces sympatriques sont que celle-ci a des ailes relativement longues et des tarses courts. Le chant de fanovanae est decrit et comparé avec celui d'autres membres du genre. Nos observations sur la morphologie, le comportement et les vocalizations de N. fanovanae confirment sa validité comme bonne espéce.
The Red-tailed Newtonia Newtonia fanovanae in the Ambatovaky Reserve, north-east Madagascar
Authors: Evans Michael I. 
Published: May 2010

SummaryThe Red-tailed Newtonia Newtonia fanovanae, known from two sites in the eastern rainforests of Madagascar, was found in the Réserve Spéciale d'Ambatovaky in February 1990, when two observations of birds in mixed-species flocks were made in primary lowland forest at 650-700 m. Such habitat may be rare in reserves, recent fieldwork having concentrated on higher-altitude sites. Ambatovaky's faunal richness as a lowland site is emphasised. Some differences in descriptions of the Red-tailed Newtonia exist.Le Newtonie à queue rouge Newtonia fanovanae, antérieurement connu de deux sites dans les forêts tropicales orientales du Madagascar, fût trouvé dans la Réserve Spéciale d'Ambatovaky en février 1990, où deux individus fûrent observés parmi des bandes plurispécifiques d'oiseaux à I'intérieur d'une excellente forêt de plainé à 650-700 m d'altitude. II se peut qu'un tel habitat soit rarement trouvé à I'intérieur de réserves, car les investigations de terrain fûrent récemment concentrées sur des sites en plus haut altitude. La richesse faunistique du site de plaine d'Ambatovaky est mise en évidence. II existe des différences de descriptions du Newtonie à queue rouge.
The status and conservation of threatened birds in the Upper Guinea forest
Authors: Allport Gary 
Published: May 2010

SummaryThere are twenty-one endemic and near-endemic forest birds in the Upper Guinea forest of West Africa. Less than 80,000 km2 of their habitat remains and this is being rapidly degraded and fragmented. Eight threatened and two near-threatened birds were identified by Collar and Stuart (1985) in this region based on the scant information then available. More recent surveys confirm the threatened status of all these birds, but two species, Melaenornis annamarulae and Malimbus ballmanni, should now be considered Vulnerable having previously been placed in the Indeterminate category. Phyllastrephus leucolepis, described since the production of the Red Data Book, is only found in the forest of east Liberia and must be considered Endangered. Records suggest that all three species are restricted to the western part of the Upper Guinea forest. There are two forest areas which are of the highest priority for the conservation of these and the other endemic birds: (i) south-east Liberia/south-west Ivory Coast; (ii) south-east Sierra Leone/northwest Liberia. Ceratogymnasubcylindricus and Phyllastrephus baumanni are recommended for inclusion in the Near-threatened category.Vingt-et-une espéces forestiéres d'oiseaux endémiques ou quasiment endémiques vivent dans la forêt de Haute-Guinée en Afrique de l'Ouest. A l'époque actuelle leur habitat, qui fût déjà réduit à moins de 80,000 km2, continue d'être rapidement dégradé et fragmenté. Collar et Stuart (1985) identifiérent huit especes menacées plus deux espéces probablement menacées pour la région, basé sur le peu d'information disponible à l'époque. Des investigations plus récentes confirment le statut de toutes ces espéces sauf deux, Melaenornis annamarulae et Malimbus ballmanni, qui fûrent insuffisamment connus, doivent maintenant être considérés vulnérables. Phyllastrephus leucolepis ne fût décrit pour la science qu'après la production du livre rouge et ne se trouve uniquement dans la forêt du Libéria oriental, et doît done être considéré comme en danger. Des observations suggérent que toutes ces espéces soient limitées à la partie occidentale de la forêt de HauteGuinée. Deux régions forestières se révèlent d'être de la plus haute priorité pour la sauvegarde de ces éspèces et des autres oiseaux endémiques: (i) le sud-est du Libéria/sud-ouest de la Côte-d'Ivoire et (ii) le sud-est du Sierra Léone/nord-ouest du Libéria. Nous recommandons d'inclure Ceratogymna subcylindricus et Phyllastrephus baumanni dans la catégorie probablement menacé.
Numbers and habitat of the Rapa Fruit-dove Ptilinopus huttoni
Authors: Thibault Jean-Claude , Varney Albert 
Published: May 2010

SummaryA survey in December/January 1989/1990 revealed that an estimated 274 Rapa Fruit-doves Ptilinopus huttoni remain in Rapa's last (and fragmented) 292 ha of forest. This suggests no serious decline since 1974, but the forests continue to be degraded and cleared, and action to preserve key sites is urgently needed.Un recensement en décembre/janvier 1989/1990 montra qu'un nombre estimé de 274 Ptilopes de Hutton Ptilinopus huttoni survivent dans les derniers 292 ha de forêt fragmen-tee sur l'île de Rapa. Ceci ne suggére aucun déclin important depuis 1974, mais les forêts continuent à être dégradées et coupées, ainsi il devient urgent d'entreprendre des actions pour le sauvegarde des sites clés.
Population declines of the endangered endemic birds on Grenada, West Indies
Authors: Blockstein David E. 
Published: May 2010

SummaryThe Grenada DoveLeptotila wellsiand the Grenada Hook-billed KiteChondrohierax uncinatus mirutshave each apparently declined since initial surveys in 1987. In a midwinter 1989/1990 census I estimated that there were 75-85 Grenada Doves, compared with 100 in 1987. The 1989/1990 numbers include two small populations not located in 1987. The main population may have declined by 40-50% since 1987. Half as many Hook-billed Kites were seen in 1989/1990 as in 1987 when I estimated the total population to be 15-30. Although seasonal factors may be responsible for some of the differences, destruction of habitat has led to real declines. Unless the prime habitat is protected, extinction of both birds is likely.
Status and conservation of parrots and parakeets in the Greater Antilles, Bahama Islands, and Cayman Islands
Authors: Wiley James W. 
Published: May 2010

SummaryIn the 1490S a minimum of 28 species of psittacines occurred in the West Indies. Today, only 43% (12) of the species survive. All macaws and most parakeet species have been lost. Although the surviving parrot fauna of the Greater Antilles, Cayman Islands, and Bahama Islands has fared somewhat better than that of the Lesser Antilles, every species has undergone extensive reductions of populations and all but two have undergone extensive reductions in range, mostly as a result of habitat loss, but also from persecution as agricultural pests, conflicts with exotic species, harvesting for pets, and natural disasters. The Cayman Brae ParrotAmazona leucocephala hesterna, with its tiny population (lessthan 150 individuals in the wild) and range, and the Puerto Rican ParrotA. vittata, with 22-23 birds in the wild and 56 individuals in captivity, must be considered on the of extinction and in need of (in the tatter's case, continuing) aggressive programmes of research and management. Other populations declining in numbers and range include the Yellow-billedAmazona collaria, and Black-billedA. agilisParrots of Jamaica, Hispaniolan ParakeetAratinga chloroptera, Hispaniolan ParrotAmazona ventralis, Cuban ParrotA. leucocephala leucocephalaand, most seriously, Cuban ParakeetAratinga euops. The population of the Grand Cayman Parrot (Amazona leucocephala caymanensis), although numbering only about 1,000 birds, appears stable and the current conservation programme gives hope for the survival of the race. An active conservation and public education programme has begun for the Bahama ParrotA. l. bahamensis, which still occurs in good numbers on Great Inagua Island, but is threatened on Abaco Island. Recommendations for conservation of parrots and parakeets in the region include (1) instituting term programmes of research to determine distribution, status, and ecology of each species; (2) developing conservation programmes through education and management approaches that are culturally, politically, and economically sensitive to the region; and providing and protecting habitat within suitably sized reserves.
Observations on the Superb Pitta Pitta superba and other Manus endemics
Authors: Dutson Guy C. L. , Newman Jonathan L. 
Published: May 2010

SummaryThe Superb Pitta Pitta superba, an almost wholly unknown rainforest endemic of Manus Island, Papua New Guinea, was investigated in June/July 1990. On the basis of its call, a rising then falling whistle given twice, it appears to occur at low densities and may be restricted to hillier areas where stones can help break snail shells. The snake Boiga irregularis may affect this and one other Manus endemic bird.
Bird conservation in Kenya: creating a national strategy
Authors: Fanshawe John H. , Bennun Leon A. 
Published: May 2010

SummaryKenya possesses one of the richest and most diverse avifaunas in Africa: this reflects the country's varied habitats and the fact that it lies at the intersection of several biogeographic zones. Some 1,070 species have been recorded; nine are national endemics and 14 can be considered globally threatened. A number of other species or groups are of particular national concern. Alteration and degradation of habitats is taking place rapidly, mainly due to human population growth combined with increased urbanization and industrialization. Overall, forests are the most threatened habitats; the coastal Arabuko-Sokoke Forest is particularly important in global terms. A number of wetlands are also under threat from a variety of causes. Habitat destruction is the key problem; direct threats such as hunting, trade and the use of pesticides and poisons are of relatively minor importance. Specific suggestions to be incorporated within a national bird conservation strategy include: better regulation and development of bird tourism as a means of generating revenue; increased efforts in particular areas of conservation education; provision of appropriate training to bird guides and researchers; and improved integration of research.
Reintroduction and restocking: guidelines for bird recovery programmes
Authors: Black Jeffrey M. 
Published: May 2010

SummaryReintroduction and restocking programmes are conservation tools which may be employed when a wild population is otherwise beyond recovery. The decision to undertake such programmes should be based on a series of “feasibility” assessments (e.g. the bird's ecology, current threats, suitability of available stock and regional human socioeconomic implications). Releases should only take place when the habitat is capable of sustaining a viable population and the original constraining factors no longer operate. Releasing birds into near-saturated areas may be harmful and should be avoided. Local, national and international support for the programme should be secured. The birds should be of optimal quality in terms of behaviour, health and genetics and they should be reared, released and monitoring according to sound strategies and criteria. Assessment and adjustments of the programme should periodically be made after initial releases. Documentation of the programme should be circulated and/or published.
Observations on a population of Red-fronted Macaws Ara rubrogenys in the Río Caine valley, central Bolivia
Authors: Boussekey Marc , Saint-Pie Jean , Morvan Olivier 
Published: May 2010

SummaryA population of about 60 Red-fronted Macaws Ara rubrogenys, a parrot endemic to central southern Bolivia, was studied in an area of around 200 ha in the Río Caine valley, northern Potosí department, in October and November 1990. The habitat was semi-desert steppe dominated by cacti; the very light rainy season (in which the macaws are believed to breed) lasts from November to April. The birds, most commonly to be seen in pairs, were active in the early morning and the later afternoon, feeding during both these periods on groundnuts in a 30 ha area cultivated by local Indians who, however, made no attempts to persecute them. There seem to be no serious threats to the species in the Rio Caine valley. However, breeding success appeared to be low, presumably reflecting the sparse dietary resources of the region.Durante los meses de octubre y noviembre de 1990, se estudió una población de Guacamayo Dorado Ara rubrogenys (especie endémica del área centro y sur de Bolivia) compuesta por unos 60 individuos. El área de estudio abarco unas 200 ha en el valle del Río Caine, al norte del departamento de Potosí. El hábitat en esta zona estaba formado por estepas semidesérticas dominadas por Cactáceas, con un período de lluvias moderadas (tiempo en el que se cree que tiene lugar la reproduccíon) que se extiende desde noviembre hasta abril. Las aves se observaron preferentemente en parejas, siendo las primeras horas de la mañana y las últimas de la tarde los momentos de mayor actividad en los que se alimentaban de maní (cacahuetes) en un área de 30 ha cultivada por indígenas, quienes no mostraron intentión alguna por evitarlo. Aparentemente no hay evidencia que induzca a pensar que la especie se encuentre amenazada en el valle del Río Caine, no obstante, el éxito reproductor aparentemente resultó ser bajo, lo que reflejaría quizás unos recursos tróficos escasos en la región.
Status, habitat and conservation of the St Helena WirebirdCharadrius sanctaehelenae
Authors: McCulloch M. Neil 
Published: May 2010

SummaryThe St Helena Wirebird, a sand plover, is the last surviving endemic bird on the South Atlantic island of St Helena. Census work carried out during 1988–1989 located a maximum of 495 individuals. This is thought to be close to the true size of the population and i s more than 50% higher than the most recent previous estimate. Population trends remain unknown, however. Breeding success appears to be low. A maximum survival rate from egg to independence of 19% was estimated. Predation and disturbance of Wirebirds is discussed. Wirebirds occur in grassland and semi-desert. Highest densities are found in relatively dry, flat pastures. Wetter upland pastures hold few Wirebirds, possibly because of more difficult feeding conditions encountered in taller, denser vegetation on steep slopes. Wirebirds prey on a wide range of invertebrates but beetles and caterpillars appear to predominate in the diet. Possible future threats, principally changes in land-use, were assessed and a management strategy for the species is outlined.
Rediscovery of the Grey-winged Cotinga Tijuca condita in south-eastern Brazil
Authors: Scott D. A. , Brooke M. De L. 
Published: May 2010

SummaryThe Grey-winged Cotinga Tijuca condita, previously known from a single specimen collected in 1942, was rediscovered near the type-locality in the coastal hill ranges of Rio de Janeiro state, south-eastern Brazil, in November 1980. Fieldwork at two sites in November/December 1980 and November 1981 revealed the presence of 10 individuals: one calling male and one female in cloud-forest at 1,320 m in the Serra do Tinguá; and six calling males, one female and one unsexed bird in cloud-forest at 1,830-2,000 m in the Serra dos Órgãos. Two females were netted, and two calling males were seen well in the field. The plumage of calling males resembled that of females, but was brighter with more grey on the face. The voice was described as an explosive sooee-wheee. The calling posture was similar to that of pihas Lipaugus, and there was no indication of any lekking behaviour. The species appears to have a very restricted distribution, but there is no indication that it is under threat at the present time.O cotingídeo Tijuca condita, previamente conhecido de um único indivíduo coletado em 1942, foi redescoberto próximo a sua localidade tipo nas montanhas da costa do estado do Rio de Janeiro, no sudeste do Brasil, em novembro de 1980. Observações no campo em duas localidades em novembro/dezembro 1980 e novembro 1981 revelaram a presença de 10 indivíduos: um macho cantando e uma fêmea em uma floresta de neblina a 1,320 m na Serra do Tinguá; seis machos, uma fêmea e um individuo de sexo não determinado em uma floresta de neblina a 1,830–2,000 m na Serra dos Órgãos. Duas fêmeas foram capturadas em rede e dois machos foram bem observados no campo. A plumagem dos machos assemelha-se a das fêmeas, contudo mais brilhante e acinzentado na face. O canto foi descrito como um explosivo sooee-wheee. A postura de canto foi semelhante à de outros cotingídeos Lipaugus e não há indícios de comportamento de leque. A espécie parece ter uma distribuição muito restrita, mas não ha indícios de que essa espécie esteja ameaçada no momento.
Preliminary survey of the avifauna of Mt Tchabal Mbabo, west-central Cameroon
Authors: Smith Thomas Bates , Mcniven Duncan 
Published: May 2010

SummaryThe montane forests of western Cameroon are well known for their endemic birds. The most northerly such forests probably occur on Mt Tchabal Mbabo, where a preliminary survey of the avifauna in 1990 found 12 montane species, of which six represented significant range extensions, among them the threatened Ploceus bannermani. Given the increasing human pressures on other montane forests in Cameroon, Mt Tchabal Mbabo may be attractive for future conservation because of its comparative lack of human disturbance. Densities of indigenous people are low and there is a lack of significant hunting and firewood-gathering, the precipitous nature of the northern slope makes human intrusions difficult, and the lack of human disturbance may mean that local animal populations are stable.Les forêts d'altitude de l'ouest du Cameroun sont bien connues pour leurs populations endémiques d'oiseaux. Les forêts les plus au nord sont celles du Mont Tchabal Mbabo, où un recensement préliminaire de la faune aviaire en 1990 a révélé 12 espèces, dont six avaient une aire de répartition relativement grande, y compris l'espèce menacée Ploceus bannermani. Etant donné l'accroissement des pressions humaines sur les autres forêts d'altitude au Cameroun, le Mont Tchabal Mbabo pourrait se réveler intéressant pour des programmes de conservation futurs, compte tenu d'une perturbation humaine relativement inexistante. Les densités de population indigène y sont faibles, et la chasse ainsi que le ramassage du bois pour les besoins domestiques ne sont pas significatifs. Les pentes abruptes du nord rendent difficile toute intrusion humaine, et l'absence de perturbations dues à l'homme pourrait signifier la stabilité des populations animales locales.
Birds of Serra da Capivara National Park, in the “caatinga” of north-eastern Brazil
Authors: Olmos Fábio 
Published: May 2010

SummarySerra da Capivara National Park covers an area of about 1,300 km2in south-eastern Piauí, north-eastern Brazil. The park's vegetation is the endemic caatinga, with a few remnants of semi-deciduous forest in some canyons. The area has a reasonable diversity of plants, with 615 catalogued species. Since 1986, 208 bird species have been observed in the park and its buffer zone, including 10 threatened or near-threatened species, plus two recently extinct in the area. Other species are regionally rare and have declined over parts of their distribution. The park also harbours several threatened mammals and caatinga endemics. Despite having been created in 1979 the park remains effectively unprotected and unmanaged. Current levels of poaching and habitat destruction prejudice the future of several species, including some that have already vanished from other parts of the caatinga.O Parque Nacional da Serra da Capivara abrange uma área de aproxidamamente 1,300 km2no sudeste do Piauí, nordeste do Brasil. A vegetação do parque é a caatinga, com alguns enclaves de mata semi-decíua. A área possui uma razoável diversidade de plantas, com um total de 615 espécies já catalogadas. Desde 1986, um total de 208 espécies de aves foram observadas no parque e sua zona-tampão, incluindo 10 consideradas ameaçadas ou quase-ameaçadas, além de duas recentemente extintas na área. Outras espécies são regionalmente raras ou tern declinado em parte de sua área de distribuição. O parque também abriga diversos mamíferos ameaçados, e endemismos da caatinga. Apesar de ter sido criado em 1979, o parque ainda não foi consolidado e é pouco mais que um parque de papel. Com os presentes niveis de caça clandestina e destruição de habitats, diversas espécies se extinguirão, incluindo algumas já desapareddas de outras partes da caatinga.