Peter Kovalik
Well-known member
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Parrots (5 Viewers)
- Thread starter Peter Kovalik
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Peter Kovalik
Well-known member
Jim LeNomenclatoriste
Je suis un mignon petit Traquet rubicole
Unnecessary since the creation of Nicopsitta, Himalayapsitta and Alexandrinus, and the resurrection of the genera Belocercus and Palaeornis by Braun and al., although not officially recognized. But, once again, it's just a matter of time.
Last edited:
Fred Ruhe
Well-known member
There is a beautiful film on Australian Parrots on youtube, it last over 53 minutes:
https://www.youtube.com/watch?v=smj-...1#t=11.3199902
Enjoy it,
Fred
https://www.youtube.com/watch?v=smj-...1#t=11.3199902
Enjoy it,
Fred
Peter Kovalik
Well-known member
Fred Ruhe
Well-known member
D.D. Chin and D. Lentink (2017)
How birds direct impulse to minimize the energetic cost of foraging flight
Science Advances 3: e1603041
DOI: 10.1126/sciadv.1603041
http://advances.sciencemag.org/content/3/5/e1603041
Birds frequently hop and fly between tree branches to forage. To determine the mechanical energy trade-offs of their bimodal locomotion, we rewarded four Pacific parrotlets with a seed for flying voluntarily between instrumented perches inside a new aerodynamic force platform. By integrating direct measurements of both leg and wing forces with kinematics in a bimodal long jump and flight model, we discovered that parrotlets direct their leg impulse to minimize the mechanical energy needed to forage over different distances and inclinations. The bimodal locomotion model further shows how even a small lift contribution from a single proto-wingbeat would have significantly lengthened the long jump of foraging arboreal dinosaurs. These avian bimodal locomotion strategies can also help robots traverse cluttered environments more effectively.
Enjoy,
Fred
How birds direct impulse to minimize the energetic cost of foraging flight
Science Advances 3: e1603041
DOI: 10.1126/sciadv.1603041
http://advances.sciencemag.org/content/3/5/e1603041
Birds frequently hop and fly between tree branches to forage. To determine the mechanical energy trade-offs of their bimodal locomotion, we rewarded four Pacific parrotlets with a seed for flying voluntarily between instrumented perches inside a new aerodynamic force platform. By integrating direct measurements of both leg and wing forces with kinematics in a bimodal long jump and flight model, we discovered that parrotlets direct their leg impulse to minimize the mechanical energy needed to forage over different distances and inclinations. The bimodal locomotion model further shows how even a small lift contribution from a single proto-wingbeat would have significantly lengthened the long jump of foraging arboreal dinosaurs. These avian bimodal locomotion strategies can also help robots traverse cluttered environments more effectively.
Enjoy,
Fred
l_raty
laurent raty
l_raty
laurent raty
Peter Kovalik
Well-known member
l_raty
laurent raty
Urantowka, Kroczak, Mackiewicz. 2017. The influence of molecular markers and methods on inferring the phylogenetic relationships between the representatives of the Arini (parrots, Psittaciformes), determined on the basis of their complete mitochondrial genomes. BMC Evol. Biol. 17:166.
[whole paper]
[whole paper]
Nutcracker
Stop Brexit!
New Amazona parrot described - posted in the Live Bird News section of Birdforum last week, not sure if it's been mentioned here or not:
http://www.birdforum.net/showthread.php?t=347834
http://www.birdforum.net/showthread.php?t=347834
Daniel Philippe
Well-known member
Peter Kovalik
Well-known member
Timothy F. Wright & Christine R. Dahlin. Vocal dialects in parrots: patterns and processes of cultural evolution. Emu - Austral Ornithology Vol. 0 , Iss. 0,0, Published online: 12 Oct 2017.
Abstract:
Vocal dialects have fascinated biologists for over 50 years. This mosaic pattern of geographic variation in learned vocalisations was first described in a songbird, and since that time most studies investigating dialects have focused on songbird species. Here we examine patterns of geographic variation in the calls of a different group of vocal learning birds, the parrots (order Psittaciformes). We summarise the growing literature on vocal variation in parrots, and complement this review with a survey of variation in the genus Amazona using calls from sound libraries. We find strikingly similar patterns to those previously found in songbirds. Over 90% of parrots examined in the literature, and 69% of Amazona species surveyed, showed geographic variation consistent with a propensity to share local call types. This trait is evolutionarily labile and widespread; within Amazona most clades contained species with and without geographic variation, and most major lineages of parrots include representatives with dialects. We found little support for the long-standing hypothesis that dialects isolate populations and thus generate genetic differences among populations. Instead, most studies support the idea that dialects are maintained by social benefits of matching local call types, a finding that has implications for the management of captive and endangered populations. Considerable scope remains for studies that experimentally test hypotheses for the exact nature of these benefits, as well as studies that employ comparisons among species, to understand how the interplay between ecology, social dynamics and vocal learning capacities produces different patterns of variation across the parrots.
Abstract:
Vocal dialects have fascinated biologists for over 50 years. This mosaic pattern of geographic variation in learned vocalisations was first described in a songbird, and since that time most studies investigating dialects have focused on songbird species. Here we examine patterns of geographic variation in the calls of a different group of vocal learning birds, the parrots (order Psittaciformes). We summarise the growing literature on vocal variation in parrots, and complement this review with a survey of variation in the genus Amazona using calls from sound libraries. We find strikingly similar patterns to those previously found in songbirds. Over 90% of parrots examined in the literature, and 69% of Amazona species surveyed, showed geographic variation consistent with a propensity to share local call types. This trait is evolutionarily labile and widespread; within Amazona most clades contained species with and without geographic variation, and most major lineages of parrots include representatives with dialects. We found little support for the long-standing hypothesis that dialects isolate populations and thus generate genetic differences among populations. Instead, most studies support the idea that dialects are maintained by social benefits of matching local call types, a finding that has implications for the management of captive and endangered populations. Considerable scope remains for studies that experimentally test hypotheses for the exact nature of these benefits, as well as studies that employ comparisons among species, to understand how the interplay between ecology, social dynamics and vocal learning capacities produces different patterns of variation across the parrots.
Red-throated Parakeet rubritorquis should also be come a full species according to their recommendations (mentioned in the abstract but not included in the title).
Niels
RSN
Rafael S. Nascimento
Anodorhynchus macaws
Papavero, N.; Teixeira, D. M. (2016) Um breve histórico das araras do gênero Anodorhynchus Spix, 1824 (Aves, Psittaciformes). Arquivos de Zoologia 47 (1).
Abstract
Since the Antiquity, parrots, parakeets and their relatives (Psittacidae) aroused a great interest in Europe, both for their colours as for their notorious capacity of interacting with human beings. With the discovery of the Americas, new species would be introduced in the traffic of exotic animals a long time ago established by Europeans with Africa and the East. Effectively, even before Columbus finished his fourth and last voyage (1502-1504), neotropical parrots had already made their appearance in chronicles, in the cartography and the fine arts. Although the oldest notices about blue macaws of the genus Anodorhynchus date from the end of the 16th century, and the first image from the beginning of the 17th century, those birds would be better known by Europeans only in the second half of the 18th century. In a general way, the sources examined herein proved to be especially significant for Anodorhynchus glaucus, as all the first hand information about the biology and the behavior of this macaw are registered in testimonies prior the 20th century. It is not impossible to suppose, therefore, that further details about this species and a better understanding of its mysterious disappearance could be obtained from the perusal of the vast documentary collection about the Rio de la Plata basin left by Jesuits, as well as from a more accurate reading of the reports by travelers and naturalists which, such as Friedrich Sellow and Auguste de Saint Hilaire, journeyed through Argentina, Paraguay, Uruguay, and southern Brazil.
Full text in Portuguese:
https://www.revistas.usp.br/azmz/article/view/111141
Papavero, N.; Teixeira, D. M. (2016) Um breve histórico das araras do gênero Anodorhynchus Spix, 1824 (Aves, Psittaciformes). Arquivos de Zoologia 47 (1).
Abstract
Since the Antiquity, parrots, parakeets and their relatives (Psittacidae) aroused a great interest in Europe, both for their colours as for their notorious capacity of interacting with human beings. With the discovery of the Americas, new species would be introduced in the traffic of exotic animals a long time ago established by Europeans with Africa and the East. Effectively, even before Columbus finished his fourth and last voyage (1502-1504), neotropical parrots had already made their appearance in chronicles, in the cartography and the fine arts. Although the oldest notices about blue macaws of the genus Anodorhynchus date from the end of the 16th century, and the first image from the beginning of the 17th century, those birds would be better known by Europeans only in the second half of the 18th century. In a general way, the sources examined herein proved to be especially significant for Anodorhynchus glaucus, as all the first hand information about the biology and the behavior of this macaw are registered in testimonies prior the 20th century. It is not impossible to suppose, therefore, that further details about this species and a better understanding of its mysterious disappearance could be obtained from the perusal of the vast documentary collection about the Rio de la Plata basin left by Jesuits, as well as from a more accurate reading of the reports by travelers and naturalists which, such as Friedrich Sellow and Auguste de Saint Hilaire, journeyed through Argentina, Paraguay, Uruguay, and southern Brazil.
Full text in Portuguese:
https://www.revistas.usp.br/azmz/article/view/111141
l_raty
laurent raty
Provost, Joseph, Smith. 2017. Resolving a phylogenetic hypothesis for parrots: implications from systematics to conservation. Emu.
[abstract & suppl.mat.]
ABSTRACT
Advances in sequencing technology and phylogenetics have revolutionised avian biology by providing an evolutionary framework for studying natural groupings. In the parrots (Psittaciformes), DNA-based studies have led to a reclassification of clades, yet substantial gaps remain in the data gleaned from genetic information. Here we provide an overview of published genetic data of parrots, characterise sampling depth across the phylogeny, and evaluate support for existing systematic treatments. We inferred a concatenated tree with 307 species from a 30-gene supermatrix. We recovered well-supported relationships among recently proposed clades. Taxonomic groups were more stable towards the base of the tree and increased sampling will be required to clarify relationships at the tips, particularly below the generic level. Only a third of species have been sampled intraspecifically in population genetic or phylogeographic surveys. Intraspecific sampling has not been geographically or phylogenetically even across Psittaciformes, especially poor in the cockatoos, Southeast Asia, and parts of Australo-Papua. Threatened species are poorly sampled in the Neotropics. We highlight where effort should be focused to improve sampling based on geography and conservation status. In sum, phylogenetic relationships among the major parrot clades are robust, but relationships within and between genera and species provide opportunities for future investigations.
KEYWORDS: Psittaciformes, supermatrix, biodiversity, phylogeography, conservation genetics, IUCN Red List
[abstract & suppl.mat.]
ABSTRACT
Advances in sequencing technology and phylogenetics have revolutionised avian biology by providing an evolutionary framework for studying natural groupings. In the parrots (Psittaciformes), DNA-based studies have led to a reclassification of clades, yet substantial gaps remain in the data gleaned from genetic information. Here we provide an overview of published genetic data of parrots, characterise sampling depth across the phylogeny, and evaluate support for existing systematic treatments. We inferred a concatenated tree with 307 species from a 30-gene supermatrix. We recovered well-supported relationships among recently proposed clades. Taxonomic groups were more stable towards the base of the tree and increased sampling will be required to clarify relationships at the tips, particularly below the generic level. Only a third of species have been sampled intraspecifically in population genetic or phylogeographic surveys. Intraspecific sampling has not been geographically or phylogenetically even across Psittaciformes, especially poor in the cockatoos, Southeast Asia, and parts of Australo-Papua. Threatened species are poorly sampled in the Neotropics. We highlight where effort should be focused to improve sampling based on geography and conservation status. In sum, phylogenetic relationships among the major parrot clades are robust, but relationships within and between genera and species provide opportunities for future investigations.
KEYWORDS: Psittaciformes, supermatrix, biodiversity, phylogeography, conservation genetics, IUCN Red List
Jim LeNomenclatoriste
Je suis un mignon petit Traquet rubicole
Incredible, Awesome!!! Can you send me the full text please?
