bluuebunny/crossref_metadata_2025_split huggingface dataset:
The distribution and conservation status of the Bearded TachuriPolystictus pectoralis
Authors: Collar N. J. , Wege D. C. 
Published: May 2010

SummaryThe Bearded TachuriPolystictus pectoralisoccupies lowland grasslands with scrubby vegetation, generally near water, in the Andean grasslands of Colombia at two sites (threatened racebogotensis), savannas in eastern Colombia and the lowland and tepui grasslands of mainly southern Venezuela, Guyana, Surinam, French Guiana and northern Brazil (racebrevipennis), reappearing south of the Amazon in central-southern Brazil, eastern Bolivia (no recent records), Paraguay, Uruguay and northern and central-eastern Argentina (nominatepectoralis). It is an austral summer visitor (October/November to February/April) to central-east Argentina, nesting (commonly in thistles) around December, clutch-size three. It feeds on insects by perch-gleaning, sallying, hover-gleaning and still-hunting. It is unobtrusive and must be commonly overlooked, and in some localities may be moderately well represented. Overall, however, it is scarce and appears to be very patchy in occurrence; grassland habitats within its range have been converted wholesale to farming. New quantitative criteria support earlier qualitative judgement that the species is probably not (yet) threatened, but that it merits near-threatened status. Suggestions that one or all of its three subspecies may be good species are premature; it is not even clear how distinct these forms are as subspecies.
Ecology and conservation of the Red-tailed AmazonAmazona brasiliensisin south-eastern Brazil
Authors: Martuscelli Paulo 
Published: May 2010

SummaryThe Red-tailed AmazonAmazona brasiliensiswas found to be restricted to a complex mosaic of forests growing on the narrow coastal plain of eastern Brazil. The species depends on habitat heterogeneity for both food and breeding. In Sào Paulo state the 1,550 individuals are divided into 16 populations. The global total of the species may be around 3,600 birds. They feed mainly on fruits, flowers and nectar, also occasionally insects. Most nests are found in permanently flooded forest, apparently because of greater cavity availability. Poaching has had a great impact and is the most immediate threat to the species.O Papagaio de Cara-RoxaAmazona brasiliensisé restrito a um complexo mosaico de florestas na estreita planicie costeirano leste do Brasil. Os papagaios dependem da heterogeneidade do ambiente tanto para sua alimentaçāo como reproducao. No estado de São Paulo existem 1,550 papagaios, divididos em 16 grupos. A populaçāo total da espécie pode ser de 3,600 individuos. Os papagaios se alimentam principalmente de frutos, flores e néctar, com alguns casos de insetivoria. A maioria dos ninhos foi encontrada em florestas permanentemente inundadas (caxetais), aparentemente devido a maior disponibilidade de cavidades. A captura para o comércio ilegal tern tido um grande impacto sobre a espécie e é a maior ameaça à sua sobrevivéncia.
Conserving the endemic birds on the Comoro Islands, III: bird diversity and habitat selection on Ngazidja
Authors: Stevens Jan , Louette Michel , Bijnens Luc , Herremans Marc 
Published: May 2010

SummaryBird species diversity is investigated in different habitat types on Ngazidja (Grand Comoro), Comoro Islands. Total bird diversity does not differ significantly among different forest types, but the proportion of endemic species, endemic subspecies and non-endemic species does. Both intact mature forests and pioneer forests on the slopes of Mount Karthala are important for the preservation of bird endemism. The forests on La Grille are poor in endemic species, but their bird species diversity is high thanks to non-endemics. Planting ofEucalyptusis useless for endemic birds.Humblotia flavirostris, Turdus bewsheriandNesillas brevicaudataavoid logged forests, butAlectroenas sganziniis numerous in them.Foudia eminentissimais common in forests with bananas planted in the undergrowth.La diversité en espèces d'oiseaux est étudiée dans différents habitats à Ngazidja (Grande Comore), lies Comores. La diversité totale ne varie pas d'une manière significative parmi les différents types de forêt, mais la fraction due aux especès endémiques, aux sous-espèces endémiques et aux espèces non-endémiques varie. Aussi bien les forêts intactes et matures et les forêts jeunes sur lave sont importantes pour la préservation d'oiseaux endémiques sur les flancs du Mont Karthala. Les forêts à La Grille sont pauvres en oiseaux endémiques, mais leur diversité est grande, grace aux espèces non-endémiques. Les plantationsd'Eucalyptusn'ont pas de valeur pour les oiseaux endémiques.Humblotia flavirostris, Turdus bewsherietNesillas brevicaudataévitent les forêts exploitées pour le bois, maisAlectroenas sganziniy est nombreux.Foudia eminentissimaest commun dans les forêts plantées de bananiers sous les arbres.
Notes on the status of Kuhl's LorikeetVini kuhliiin the Northern Line Islands, Kiribati
Authors: Watling Dick 
Published: May 2010

SummaryKuhl's LorikeetVini kuhliihas a precarious status reflected by its disjunct distribution in the Pacific, with surviving populations in the Northern Line (Kiribati) and Austral Islands (French Polynesia) some 3,000 km apart, possibly as a result of Polynesian trade in red feathers. The species is extinct in the southern Cook Islands. On Rimatara (Austral Islands), where it is believed indigenous, it is still common but the recent introduction of theRattus norvegicusis of concern. In the Northern Line Islands,R. rattusappears to have all but extirpated the lorikeet on Tabuaeran (Fanning Island), but one small population has apparently survived for over 70 years, an explanation for which may guidein situconservation ofVinilorikeets on ship-rat-infested islands elsewhere. The arid and unpredictable climate of Kiritimati (Christmas Island) may preclude the establishment of lorikeets. Only on Teraina (Washington Island), where over 1,000V. kuhliisurvive, are there no confirmed threats and goodin situconservation potential.
Endemic birds and protected area development on the Da Lat Plateau, Vietnam
Authors: Eames Jonathan C. 
Published: May 2010

SummaryA study of Thuong Da Nhim and Chu Yang Sin Nature Reserves - identified as priority sites because located within the Da Lat Plateau Endemic Bird Area (EBA) in Vietnam -was conducted between 10 November 1993 and 1 February 1994. A total of 212 bird species, of which 11 are considered globally threatened (including the rediscovered Grey-crowned CrociasCrocias langbianis), were recorded in the reserves. Eight restricted-range species were recorded, including the four species confined to the EBA. These two reserves are of international importance because they jointly support bird communities representative of the EBA. They are also of great economic importance, being within watersheds. Their extent is believed adequate but it is not known if they encompass all representative habitats over the full altitudinal range. Local tribal communities traditionally practise shifting cultivation, which has greatly modified the extent, composition and quality of evergreen forest and is causing its increasing fragmentation. Deliberate fires are preventing the regeneration of evergreen forest and promoting the growth of a climax dominated byPinus kesiya. This reduces bird diversity and compromises the future of the endemic bird taxa. Other threats include recent logging activities, human immigration, the urban expansion of Da Lat and consequent increasing demand for charcoal and fuelwood. The Ministry of Agriculture and Rural Development should urgently proceed with the production of management plans for these areas, aiming to create a single, enlarged protected area. The primary land-use management strategy should be to conserve remaining areas of evergreen forest and to increase their extent by boundary realignment, elimination of shifting cultivation and fire, and the introduction of sympathetic forestry practices.
Rediscovery of the Grey-crowned Crocias Crocias langbianis
Authors: Eames Jonathan C. , Trai Le Trong , Cu Nguyen 
Published: May 2010

SummaryThe Grey-crowned Crocias Crocias langbianis, previously known from three specimens collected near Da Lat, Lam Dong province, Vietnam, was rediscovered in Chu Yang Sin Nature Reserve, Dak Lak province, in January 1994. Subsequent fieldwork at this site in March and April 1995 revealed the presence of a population inhabiting lower-montane evergreen forest. The species was recorded during an eight-day period. The species appears to have highly specific ecological requirements and several management recommendations are made which would reduce the level of threat to the habitat of the species at this site.
Conservation of the Dark-rumped Petrel Pterodroma phaeopygia of the Galápagos Islands, 1982–1991
Authors: Cruz Justine B. , Cruz Felipe 
Published: May 2010

SummaryEarly work on the Dark-rumped Petrel Pterodroma phaeopygia of the Galápagos Islands, Ecuador, identified colony sites and population status and alerted wildlife managers to an alarming decline in nesting numbers. Predation by introduced mammals, such as rats, cats, pigs and dogs, is the chief concern, followed by loss of nesting habitat to agricultural development. Programmes to reduce predation through poisoning and hunting, begun in 1983, increased the number of chicks fledged from the main breeding colony in eight out of nine years. Pre-breeding adults were lured by tape-recordings to ‘safe’ sites where they successfully raised chicks in artificial nests. Tape-luring offers hope for establishing new colonies on predator-free islands.
Causes of the decline of the Gouldian Finch Erythrura gouldiae
Authors: Tidemann Sonia C. 
Published: May 2010

SummaryPopulations of Gouldian Finch Erythrura gouldiae, an estrildid endemic to northern Australia, declined markedly during the last two or three decades. A survey revealed the species in two areas of Northern Territory, with an estimated 2,000 individuals, including juveniles. Recaptures were low either because of mortality or dispersal. Gouldian Finches eat predominantly Sorghum spp. seeds, but consume other seeds before Sorghum ripens. Other finches declined as cattle increased. Gouldian Finches breed in tree hollows of predominantly two species of eucalypts that grow on rocky slopes. They require water within about 4 km of the nest site. There was no shortage of nesting hollows at the known breeding sites. Fires in the early to mid-dry season allow birds access to seed without damaging trees, but later fires can destroy trees with nest hollows and remove shade. Average clutch-size is 5.2. About 72% of eggs laid, and 63% of nests, fledged young. Pairs lay up to three clutches in a season (February-August), the length of which may depend on rainfall during the preceding wet season. Air-sac mite (Sternostoma tracheacolum), found in 62% of Gouldian Finches sampled, may be preventing the species recovering to former numbers. New colonies of Gouldian Finches should be identified, populations monitored, and habitat managed by effecting patchy burns by low-intensity fires early in the dry season.
Re-establishment of an endangered subspecies: the Norfolk Island Boobook Owl Ninox novaeseelandiae undulata
Authors: Olsen Penny D. 
Published: May 2010

SummaryThe Norfolk Island Boobook Ninox novaeseelandiae undulata is confined to the small, isolated Norfolk Island group, an Australian territory. On morphological and biogeographical grounds, it is here classified as a large, distinctive subspecies of the New Zealand Morepork N. novaeseelandiae. In 1986 only one specimen, a female, survived. A shortage of large trees with suitable nesting holes appeared to be the immediate problem. The Australian Nature Conservation Agency, islanders and New Zealand wildlife authorities have cooperated in an attempt to re-establish an owl population in situ. Nest-boxes were erected in trees in the area frequented by the female and were used readily as roosts. In September 1987, two male New Zealand Moreporks were introduced. The female paired with one male and produced four hybrid F offspring (in 1989 and 1990). Two of these paired in mid-1991 and have since produced five F offspring (two in 1993 and three in 1994). The original female remains paired but now appears to be reproductively senile. At present there seems to be a shortage of mature males, since two female offspring are paired and both lay eggs and attempt to incubate them in the same nest; and a lone female has established a territory. In early 1995 all eleven owls appeared to be alive in the wild. The effort is low-cost, requires relatively little manpower, is carried out with minimal disturbance to the owls, and goes hand in hand with other conservation programmes.
Conservation and genetics of New Zealand parakeets
Authors: Triggs S. J. , Daugherty C. H. 
Published: May 2010

SummaryRecent genetic analysis of New ZealandCyanoramphusparakeets has direct implications for conservation management. A subspecies of Yellow-crowned Parakeet, Forbes's Parakeet C.auriceps forbesi, is genetically distinct from mainland Yellow-crowned Parakeets C.a. auricepsand should be elevated to species status. Even amongst mainland populations of Yellow-crowned Parakeets there was extensive genetic diversity. Interspecific hybridization is a major concern ofCyanoramphusconservation. The near-extinction of Forbes's Parakeets by genetic swamping through hybridization with Chatham Islands Red-crowned Parakeets C.novaezelandiae chathamensishas been averted by active management, involving culling of hybrid and Red-crowned Parakeets and habitat enhancement. Despite two decades of hybridization between these species a distinct Forbes genetic type still exists, probably due to a tendency for hybrids to backcross with Red-crowned Parakeets. Hybridization betweenCyanoramphusspecies may also be a problem in other highly modified habitats, such as parts of the Auckland Islands. More information is needed to determine the extent of this problem. Captive populations include a significant proportion of interspecific hybrids and therefore should not be used as founder stock for releases into the wild, as has been done in the past. The Orange-fronted Parakeet should be reinstated as a separate species,Cyanoramphus malherbi, rather than a colour morph of Yellow-crowned Parakeet, at least until conclusive evidence is available to resolve the question of its taxonomic status. The conservation of this very rare species (and indeed all species ofCyanoramphus)- has been severely handicapped by lack of scientific information on which to base management decisions.
Translocation of Ultramarine Lories Vini ultramarina in the Marquesas Islands: Ua Huka to Fatu Hiva
Authors: Kuehler C. , Lieberman A. , Varney A. , Unitt P. , Sulpice R. M. , Azua J. , Tehevini B. 
Published: May 2010

SummaryThe Ultramarine Lory (Ultramarine Lorikeet, Marquesas Lorikeet, Pihiti) Vini ultramarina is one of the most threatened insular Lory species. Endemic to the Marquesas Islands, where it probably once ranged throughout the archipelago, it has been nearly extirpated from all but the tiny island of Ua Huka. Given the vulnerability of a single population inhabiting one small island, and the decline of the species in recent years, establishment of the Ultramarine Lory on another less disturbed island within its historic range has been proposed as a conservation strategy. This paper describes a 1991 survey evaluating the status of the Ultramarine Lory in the Marquesas Islands, and three subsequent translocations of birds from the island of Ua Huka to the island of Fatu Hiva. Twenty-nine birds were relocated during the period from 1992 to 1994 at the request of the Delegation de L'Environnement, French Polynesia. A preliminary survey, prior to the third translocation, indicates that previously transferred birds are surviving and may be reproducing; an intensive survey is planned in 1997.
A method for establishing bird conservation value at a landscape level
Authors: Fornasari Lorenzo , de Carli Elisabetta , Bottoni Luciana , Massa Renato 
Published: May 2010

SummaryTo produce conservation indices from bird community data, with the aim of identifying and comparing areas of regional conservation concern, we selected bird community samples randomly over a large study area, without including habitat featuresa prioriin the sampling procedure. Subsequently, we subjected the samples to a cluster analysis to identifya posterioribird communities to be indexed together with their associated habitat and distribution/abundance on a regional scale. We identified 15 bird community types and were able to characterize each of them by a community conservation index (CCI) taking into account three different components of rarity: habitat selectivity, geographical distribution, and abundance. A cluster of four communities was associated with lowland farmland and woodland; another cluster of five was found at higher average altitudes and degree of urbanization; a third one of six showed a montane distribution. This third cluster showed much higher CCI values in comparison with the first two suggesting that the index here proposed is very sensitive to a high community selectivity and a restricted distribution/abundance.
The conservation status of birds on the Cordillera de Colán, Peru
Authors: Davies C. W. N. , Barnes R. , Butchart S. H. M. , Fernandez M. , Seddon N. 
Published: May 2010

SummaryIn July and August 1994, we surveyed two areas in the south of the Cordillera de Colán, Amazonas department, Peru, above the north bank of the río Utcubamba. We found a high rate of deforestation, with trees being felled for timber, forest being cleared for the cultivation of cash crops, and elfin forest being burned for pasture. Most of the forest on the mountain range may have been cleared in 10 years. We recorded a number of important bird species, highlighting the significance of the area for the conservation of biodiversity; globally threatened birds included Peruvian Pigeon Columba oenops, Military Macaw Ara militaris and Royal Sunangel Heliangelus regalis. Elfin forest is under particular threat in the area, but probably still holds species such as Long-whiskered Owlet Xenoglaux loweryi. We recommend that a protected area containing areas of cloud-forest and elfin forest be established on the Cordillera de Colán.
Distribution and conservation status of Congo Peafowl Afropavo congensis in eastern Zaire
Authors: Hart John A. , Upoki Agenoga 
Published: May 2010

summaryBetween 1993 and 1995 the occurrence and status of Congo Peafowl Afropavo congensis were assessed at 89 sites in eastern Zaire based on interviews with local hunters (114 locations) and forest surveys (24 locations). The survey region covered approximately 125,000 km2 and was bounded by the Lomami River (24° 30′) to the west, the Albertine Rift Highlands (29°) to the east, the Aruwimi River (20° 30′) to the north and the Kahuzi Biega Park (3° S) to the south. Congo Peafowl have been extirpated or were only doubtfully present at 16 of 65 sites where survey coverage was adequate and where the species was reported to have occurred in the past. Occurrence of the species was confirmed or probable at the remaining 49 sites. Congo Peafowl were reported as locally common (> five reported encounters since 1990) at only 12 sites. We observed or heard peafowl at five sites. A single nest was found which contained two eggs. Observations on group size and habitat associations were also made. Congo Peafowl were considered to be seriously threatened at 19 of the 65 sites. Captures in snares set for small mammals and antelope are a major threat to Congo Peafowl throughout most of the survey region. Mining, shifting cultivation and logging leading to habitat loss were significant threats in several locations. Congo Peafowl appear to have disappeared from several sites where human activity was frequent, but habitat loss was not extensive. The mass movements of Rwandan refugees into eastern Zaire, which began in 1994, pose, a threat to Congo Peafowl in a number of areas. Conservation of the Congo Peafowl in eastern Zaire is best assured in the Maiko National Park where the species appears to be locally common. Further surveys within the Congo Peafowl's range in central Zaire, and study of the behaviour and ecological needs of the species are recommended.
Shifting cultivation along the Trans-African Highway and its impact on the understorey bird community in the Ituri Forest, Zaire
Authors: Plumptre Andrew J. 
Published: May 2010

summarySince the 1940s, horticulturalists (the Lese) have been settled along the sides of the roads that traverse a large part of the forest in eastern Zaire. These people have maintained their lifestyle of shifting cultivation and trade with the Mbuti pygmies. This has resulted in corridors of heavily disturbed and regenerating forest. The results of a study of the understorey bird community at three sites in the Okapi Reserve in the Ituri forest in Zaire are reported here. Two primary forest sites (one monodominant Gilbertiodendron forest) in the Reserve were compared with an area of forest disturbed by shifting cultivation. The two primary forest sites were more similar in species composition than they were to secondary forest created by shifting cultivation. Shifting cultivation had a more severe impact on the bird community than selective logging does in forests in Uganda and Malaysia. There was a shift following disturbance from a bird community dominated by insectivores to one with more frugivore-insectivores and nectarivores. Ground thrushes Zoothera spp. and flycatchers were abundant in the monodominant Gilbertiodendron forest and appear to suffer from the change in forest structure following disturbance. The Okapi Reserve currently conserves some important bird species and at least 333 birds have been reported to occur there.
Rediscovery and status of the Brown-banded Antpitta Grallaria milleri in the central Andes of Colombia
Authors: Kattan Gustavo H. , Beltrán J. William 
Published: May 2010

SummaryThe Brown-banded Antpitta was last recorded in the Central Andes of Colombia in 1942 but a population of the species has been rediscovered in the Ucumarí Regional Park.Grallaria milleri era una especie conocida de solo diez especímenes colectados en dos localidades de la vertiente occidental de la Cordillera Central de Colombia. Nueve de los especímenes fueron colectados en la cuenca del Río Quindío, a elevaciones entre 2, 745 y 3,140 m, en 1911 y 1942. El décimo especimen fue colectado en 1918, a 3 km de la ciudad de Manizales. Durante trabajo ornitológico realizado en el Parque Regional Ucumarí desde 1994, individuos de esta especie han sido capturados en redes y observados, lo cual revela la presencia de una población en este sitio intermedio entre las dos localidades originales. El Parque Ucumarí tiene 4,240 ha y protege la cuenca alta del Río Otún entre 1,800 y 2,600 m. G. milleri ha sido registrada solamente en un estrecho rango entre 2,400 y 2,600 m, en donde se han contado 93 individuos a lo largo de 6.3 km de transectos en tres tipos de hábitat: rastrojos de regenración temprana, plantaciones de aliso (Alnus acuminata) y bosques de regeneratión de treinta años. En esta localidad G. milleri es simpátrica con otras cuatro especies de Grallaria (squamigera, nuchalis, ruficapilla y rufocinerea) y con Grallaricula nana, por lo cual Ucumarí es un sitio de gran interés para la conservatión de este grupo de aves neotropicales.