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306
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306 results for “Birds (Aves)”
Data from: Flight reconstruction of two European enantiornithines (Aves, Pygostylia) and the achievement of bounding flight in Early Cretaceous birds
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Data from: A supermatrix phylogeny of corvoid passerine birds (Aves: Corvides)
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Data from: Qualitative skeletal correlates of wing shape in extant birds (Aves: Neoaves)
Background: Among living fliers (birds, bats, and insects), birds display relatively high aspect ratios, a dimensionless shape variable that distinguishes long and narrow vs. short and broad wings. Increasing aspect ratio results in a functional tradeoff between low induced drag (efficient cruise) and increased wing inertia (difficult takeoff). Given the wide scope of its functional effects, the pattern of aspect ratio evolution is an important factor that contributes to the substantial ecological and phylogenetic diversity of living birds. However, because the feathers that define the wingtip (and hence wingspan and aspect ratio) often do not fossilize, resolution in the pattern of avian wing shape evolution is obscured by missing information. Here I use a comparative approach to investigate the relationship between skeletal proxies of flight feather attachment and wing shape. Results: An accessory lobe of the internal index process of digit II-1, a bony correlate of distal primary attachment, shows weak but statistically significant relationships to aspect ratio and mass independent of other skeletal morphology. The dorsal phalangeal fossae of digit II-1, which house distal primaries VIII and IX, also show a trend of increased prominence with higher aspect ratio. Quill knobs on the ulna are examined concurrently, but do not show consistent signal with respect to wing shape. Conclusions: Although quill knobs are cited as skeletal correlates of flight performance in birds, their relationship to wing shape is inconsistent among extant taxa, and may reflect diverging selection pressures acting on a conserved architecture. In contrast, correlates of distal primary feather attachment on the major digit show convergent responses to increasing aspect ratio. In light of the diversity of musculoskeletal and integumentary mophology that underlies wing shape in different avian clades, it is unlikely that a single skeletal feature will show consistent predictive power across Neoaves. Confident inference of wing shape in basal ornithurine birds will require multiple lines of evidence, together with an understanding of clade-specific evolutionary trends within the crown.
FIGURES 1, 2 in A new species and further records of quill mites (Acari: Cheyletoidea: Syringophilidae) parasitic on birds (Aves) in England
FIGURES 1, 2. Bubophilus aluconis sp. n. Female. 1. Dorsal view. 2. Ventral viev.
FIGURE 1 in Nomenclatural and taxonomic status of bird taxa (Aves) described by an ornithological swindler, Josef Prokop Pražák (1870 – 1904)
FIGURE 1. Josef Prokop Pražák (1870–1904). From Volf (1932).
FIGURES 40–41. Myrsidea castroae n in New host records and descriptions of five new species of Myrsidea Waterston, 1915 (Phthiraptera: Menoponidae) from passerine birds (Aves: Passeriformes)
FIGURES 40–41. Myrsidea castroae n. sp.: (40) female holotype; (41) male paratype.
FIGURES 7, 8. Torotrogla mima Kethley, 1970, female. 7 in Quill mites (Acari: Syringophilidae) from mimid birds (Aves: Mimidae)
FIGURES 7, 8. Torotrogla mima Kethley, 1970, female. 7, dorsal view; 8, ventral view.
FIGURES 1, 2 in Quill mites (Acari: Syringophilidae) from mimid birds (Aves: Mimidae)
FIGURES 1, 2. Syringophilopsis mimidus sp. nov., female. 1, dorsal view; 2, ventral view.
FIGURE 4 in The first records of quill mites of the family Syringophilidae (Acariformes: Prostigmata: Cheyletoidea) from trogoniform birds (Aves: Trogoniformes)
FIGURE 4. Syringophilopsis trogoni sp. nov., female. A, dorsal view; B, ventral view.
FIGURE 2 in The first records of quill mites of the family Syringophilidae (Acariformes: Prostigmata: Cheyletoidea) from trogoniform birds (Aves: Trogoniformes)
FIGURE 2. Syringophiloidus quetzali sp. nov., male. A, dorsal view; B, ventral view.
FIGURE 1 in The first records of quill mites of the family Syringophilidae (Acariformes: Prostigmata: Cheyletoidea) from trogoniform birds (Aves: Trogoniformes)
FIGURE 1. Syringophiloidus quetzali sp. nov., female. A, dorsal view; B, ventral view.
FIGURE 3 in Two new species of the syringophilid quill mites (Acari: Prostigmata: Syringophilidae) parasitizing apodiform birds (Aves: Apodiformes)
FIGURE 3. Syringophiloidus apus sp. nov., female. A, peritreme; B, setae; C, fan-like seta p'III.
FIGURE 2 in Two new species of the syringophilid quill mites (Acari: Prostigmata: Syringophilidae) parasitizing apodiform birds (Aves: Apodiformes)
FIGURE 2. Syringophiloidus apus sp. nov., female. A, dorsal view; B, ventral view.
FIGURES 1, 2 in Quill mites (Acari: Syringophilidae) associated with galliform birds (Aves: Galliformes)
FIGURES 1, 2. Kalomotrypetes cracidus sp. nov., female. 1, dorsal view; 2, ventral view.
FIGURE 89 in A review of the mite subfamily Harpirhynchinae (Acariformes: Harpirhynchidae) — parasites of New World birds (Aves: Neognathae)
FIGURE 89. Anharpyrhynchus elizae Bochkov and Klompen, 2014 female: A—dorsal view; B—ventral view.
FIGURE 85 in A review of the mite subfamily Harpirhynchinae (Acariformes: Harpirhynchidae) — parasites of New World birds (Aves: Neognathae)
FIGURE 85. Neharpyrhynchus spizella sp. nov., female. A—dorsal view; B—ventral view.
FIGURE 84 in A review of the mite subfamily Harpirhynchinae (Acariformes: Harpirhynchidae) — parasites of New World birds (Aves: Neognathae)
FIGURE 84. Neharpyrhynchus vireo sp. nov., female. A—dorsal view; B—ventral view.
FIGURE 79 in A review of the mite subfamily Harpirhynchinae (Acariformes: Harpirhynchidae) — parasites of New World birds (Aves: Neognathae)
FIGURE 79. Neharpyrhynchus quiscalus sp. nov., female. A—dorsal view; B—ventral view.
FIGURE 71 in A review of the mite subfamily Harpirhynchinae (Acariformes: Harpirhynchidae) — parasites of New World birds (Aves: Neognathae)
FIGURE 71. Neharpyrhynchus picidarum sp. nov., male. A—dorsal view; B—ventral view.
FIGURE 58 in A review of the mite subfamily Harpirhynchinae (Acariformes: Harpirhynchidae) — parasites of New World birds (Aves: Neognathae)
FIGURE 58. Crassacarus sialia sp. nov., female. A—dorsal view; B—ventral view.
ScienceDex guides
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.