Distribution, abundance, and conservation of Vinaceous Amazons (Amazona vinacea) in Argentina and Paraguay

Cockle, Kristina L.; Capuzzi, Gabriel; Bodrati, Alejandro; Clay, Rob P.; Castillo, Hugo del; Velázquez, Myriam C.; Areta, Juan Ignacio; Fariña, Néstor; Fariña, R

doi:10.1111/j.1557-9263.2006.00082.x

Cited by 26 publications

(32 citation statements)

References 13 publications

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“…Rainbow lorikeets were the most common bird within remnants in Brisbane, Queensland , and in Argentina the New Caledonian rainbow lorikeet (Trichoglossus haematodus deplanchii) and vinaceous parrot (Amazona vinacea) are abundant in areas of human habitation and frequently utilise remnant vegetation (Cockle et al 2007;Legault et al 2012). Remnants close to foraging sites may also be particularly important, given that they provide more tree hollows than streets and Australian parrots are obligate cavity nesters.…”

Section: Density Of Birds Within Habitatsmentioning

confidence: 98%

The association between nectar availability and nectarivore density in urban and natural environments

2014

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In some Australian and South American cities, nectarivorous birds have become a conspicuous component of the avifaunal community. One mechanism that has been proposed to explain their success is an increased availability of nectar that is provided by suburban gardens and other ornamental plantings. To determine whether the amount of nectar within the suburban landscape is comparable to that of the natural environment, we measured floral density and nectar concentrations in 24 sites in Sydney, Australia. We also measured the density of four species of nectarivores and available nectar energy over a period of 18 months within the suburban landscape (streetscapes and remnant vegetation) and the natural environment (forest and heathland) to determine whether nectar availability explains nectarivore density. Two species of nectarivorous parrot, the rainbow lorikeet and musk lorikeet were present in higher densities within the suburban landscapes compared to the natural environment, and the suburban landscapes provided significantly more nectar than the natural environment during spring and winter. Both the rainbow lorikeet and musk lorikeet were associated with flowering of Eucalyptus spp. and red wattlebirds with the flowering of Grevillea and Callistemon spp. within streetscapes. Suburban landscapes appear to provide a constant supply of nectar for large-bodied nectarivores and provide for more efficient foraging, explaining the success of these species in urban environments.Urban Ecosyst

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Section: Density Of Birds Within Habitatsmentioning

confidence: 98%

The association between nectar availability and nectarivore density in urban and natural environments

2014

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“…Some nest‐tree characteristics might be important to one or two species, but would not have been identified in our community‐level study. Species‐specific studies of nest‐site selection are a research priority, especially for endangered species like the Vinaceous parrot Amazona vinacea (Cockle et al 2007).…”

mentioning

confidence: 99%

“…The laurel, guatambú, and Paraná pine forest remains in Argentina only in small fragments and as isolated trees, mostly on small farms. These farms still support relatively well‐connected forest patches with the full complement of nongame forest bird species, including the only large breeding population of the endangered Vinaceous parrot in Argentina (Cockle et al 2007; A. Bodrati & K. Cockle, unpubl. data).…”

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confidence: 99%

Selection of Nest Trees by Cavity-nesting Birds in the Neotropical Atlantic Forest

2010

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One of the five most important global biodiversity hotspots, the Neotropical Atlantic forest supports a diverse community of birds that nest in tree cavities. Cavitynesting birds may be particularly sensitive to forestry and agricultural practices that remove potential nest trees; however, there have been few efforts to determine what constitutes a potential nest tree in Neotropical forests. We aimed to determine the characteristics of trees and cavities used in nesting by excavators (species that excavate their own nest cavity) and secondary cavity-nesters (species that rely on existing cavities), and to identify the characteristics of trees most likely to contain suitable cavities in the Atlantic forest of Argentina. We used univariate analyses and conditional logistic regression models to compare characteristics of nest trees paired with unused trees found over three breeding seasons (2006)(2007)(2008). Excavators selected dead or unhealthy trees. Secondary cavity-nesters primarily selected cavities that were deep and high on the tree, using live and dead cavity-bearing trees in proportion to their availability. Nonexcavated cavities suitable for birds occurred primarily in live trees. They were most likely to develop in large-diameter trees, especially grapia Apuleia leiocarpa and trees in co-dominant or suppressed crown classes. To conserve cavity-nesting birds of the Atlantic forest, we recommend a combination of policies, economic assistance, environmental education, and technical support for forest managers and small-scale farmers, to maintain large healthy and unhealthy trees in commercial logging operations and on farms.Abstract in Spanish is available at http://www.blackwell-synergy.com/loi/btp.

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“…Estas variables probablemente son importantes porque permiten que los pericos que están anidando minimicen el tiempo de búsqueda de cavidades en potencialesáreas de anidación, de este modo reduciendo las demandas energéticas y la exposición potencial a depredadores. El perico (E. leptorhynchus) puede así usar un procesos jerárquico de selección de lugares de anidación; después que un parche de hábitat es elegido, los pericos pueden entonces inspeccionar arboles de manera individual en búsqueda de lugares The family Psittacidae is the world's most threatened group of birds, with at least 28% of the species in this family facing some risk of extinction (Collar 1997, 2000, Snyder et al 2000, Cockle et al 2007). Slender-billed Parakeets (Enicognathus leptorhynchus; locally known as choroy) are endemic secondary cavity nesters of the south-temperate forests of Chile and little is known about their natural history (e.g., Peña-Foxon et al 2011).…”

Section: Resumen Selección De Lugares De Anidación Por Enicognathus unclassified

“…The family Psittacidae is the world's most threatened group of birds, with at least 28% of the species in this family facing some risk of extinction (Collar 1997, 2000, Snyder et al 2000, Cockle et al 2007). Slender‐billed Parakeets ( Enicognathus leptorhynchus; locally known as choroy) are endemic secondary cavity nesters of the south‐temperate forests of Chile and little is known about their natural history (e.g., Peña‐Foxon et al 2011).…”

mentioning

confidence: 99%

Nest-site selection by Slender-billed Parakeets in a Chilean agricultural-forest mosaic

Carneiro

Jiménez

Vergara

et al. 2013

Journal of Field Ornithology

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Species in the family Psittacidae may be particularly vulnerable to anthropogenic habitat transformations that reduce availability of suitable breeding sites at different spatial scales. In southern Chile, loss of native forest cover due to agricultural conversion may impact populations of Slender‐billed Parakeets (Enicognathus leptorhynchus), endemic secondary cavity‐nesting psittacids. Our objective was to assess nest‐site selection by Slender‐billed Parakeets in an agricultural‐forest mosaic of southern Chile at two spatial scales: nest trees and the habitat surrounding those trees. During the 2008–2009 breeding seasons, we identified nest sites (N= 31) by observing parakeet behavior and using information provided by local residents. Most (29/31) nests were in mature Nothofagus obliqua trees. By comparing trees used for nesting with randomly selected, unused trees, we found that the probability of a tree being selected as a nest site was positively related to the number of cavity entrances, less dead crown, and more basal injuries (e.g., fire scars). At the nesting‐habitat scale, nest site selection was positively associated with the extent of basal injuries and number of cavity entrances in trees within 50 m of nest trees. These variables are likely important because they allow nesting parakeets to minimize cavity search times in potential nesting areas, thereby reducing energetic demands and potential exposure to predators. Slender‐billed Parakeets may thus use a hierarchical process to select nest sites; after a habitat patch is chosen, parakeets may then inspect individual trees in search of a suitable nest site. Effective strategies to ensure persistence of Slender‐billed Parakeets in agricultural‐forest mosaics should include preservation of both individual and groups of scattered mature trees.

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Distribution, abundance, and conservation of Vinaceous Amazons (Amazona vinacea) in Argentina and Paraguay

Cited by 26 publications

References 13 publications

The association between nectar availability and nectarivore density in urban and natural environments

The association between nectar availability and nectarivore density in urban and natural environments

Selection of Nest Trees by Cavity-nesting Birds in the Neotropical Atlantic Forest

Nest-site selection by Slender-billed Parakeets in a Chilean agricultural-forest mosaic

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