4,008 results found
    1. Evolutionary Biology

    Birds land reliably on complex surfaces by adapting their foot-surface interactions upon contact

    William RT Roderick et al.
    When landing, Pacific parrotlets exhibit stereotyped leg and wing dynamics regardless of perch diameter and texture, but foot and claw kinematics become surface-specific upon touchdown to successfully grasp the perch.
    1. Biochemistry and Chemical Biology
    2. Neuroscience

    Complementary shifts in photoreceptor spectral tuning unlock the full adaptive potential of ultraviolet vision in birds

    Matthew B Toomey et al.
    Birds that see ultraviolet light tune the sensitivity of their short-wavelength photoreceptors with colored filters to maximize the number of colors they can see.
    1. Evolutionary Biology
    2. Genetics and Genomics

    Immune genes are hotspots of shared positive selection across birds and mammals

    Allison J Shultz, Timothy B Sackton
    Pathogens, particularly viruses, target the same genes over deep evolutionary time, resulting in shared signatures of positive selection and transcriptional responses at the same genes.
    1. Biochemistry and Chemical Biology
    2. Ecology

    The energy savings-oxidative cost trade-off for migratory birds during endurance flight

    Scott McWilliams et al.
    Migratory birds with fuel stores composed of more omega-6 fats saved energy during long-duration flights, but this short-term energy saving came at the long-term cost of higher oxidative damage.
    1. Computational and Systems Biology
    2. Neuroscience

    A kinematic synergy for terrestrial locomotion shared by mammals and birds

    Giovanna Catavitello et al.
    General principles of the limb segment control for terrestrial locomotion have emerged in evolution and highlight the existence of the laws of biological motion that apply to various animal species.
    1. Evolutionary Biology
    2. Genetics and Genomics

    The evolutionary history and genomics of European blackcap migration

    Kira Delmore et al.
    Variation in migration can evolve rapidly and traits that comprise this behaviour may be determined by standing variation at a few regulatory regions that are not common across taxonomic groups.
    1. Structural Biology and Molecular Biophysics
    2. Chromosomes and Gene Expression

    The AFF4 scaffold binds human P-TEFb adjacent to HIV Tat

    Ursula Schulze-Gahmen et al.
    Structure-function analysis of the super elongation complex formed when HIV replicates inside cells reveals that the HIV-1 Tat protein binds to a cleft between P-TEFb, an enzyme that is involved in normal transcription, and AFF4, a protein that is used to build the super elongation complex
    1. Evolutionary Biology

    A non-archaeopterygid avialan theropod from the Late Jurassic of southern Germany

    Oliver WM Rauhut et al.
    A new taxon from the Late Jurassic of southern Germany represents the second volant bird known from that time period and documents the improvement of flapping flight in bird evolution.
    1. Evolutionary Biology

    Compound-V formations in shorebird flocks

    Aaron J Corcoran, Tyson L Hedrick
    Shorebird flocks fly in a formation that re-creates the neighbor positioning relationship of a V-formation in cluster flocks of more than 1000 birds.
    1. Computational and Systems Biology
    2. Neuroscience

    Bi-channel image registration and deep-learning segmentation (BIRDS) for efficient, versatile 3D mapping of mouse brain

    Xuechun Wang et al.
    A dual-channel image registration pipeline combined with deep-learning inference achieves accurate-and-flexible registration/segmentation/mapping of mouse brain.

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