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9 results for “flight efficiency”
Morphological adaptations linked to flight efficiency and aerial lifestyle determine natal dispersal distance in birds
<p>Natal dispersal—the movement from birthplace to breeding location—is often considered the most significant dispersal event in an animal's lifetime. Natal dispersal distances may be shaped by a variety of intrinsic and extrinsic factors, and remain poorly quantified in most groups, highlighting the need for indices that capture variation in dispersal among species.</p> <p>In birds, it is hypothesized that dispersal distance can be predicted by flight efficiency, which can be estimated using wing morphology. However, the use of morphological indices to predict dispersal remains contentious and the mechanistic links between flight efficiency and natal dispersal are unclear.</p> <p>Here, we use phylogenetic comparative models to test whether hand-wing index (HWI, a morphological proxy for wing aspect ratio) predicts natal dispersal distance across a global sample of 114 bird species. In addition, we assess whether HWI is correlated with flight usage in foraging and daily routines.</p> <p>We find that HWI is a strong predictor of both natal dispersal distance and a more aerial lifestyle.</p> <p>Our results support the use of HWI as a valid proxy for relative natal dispersal distance, and also suggest that evolutionary adaptation to aerial lifestyles is a major factor connecting flight efficiency with patterns of natal dispersal.</p>
Morphological adaptations linked to flight efficiency and aerial lifestyle determine natal dispersal distance in birds
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The effect of flight efficiency on gap‐crossing ability in Amazonian forest birds
<p>We used this dataset to examine the role of flight efficiency on gap-crossing ability in Amazonian forest birds. We used data from the Biological Dynamics of Forest Fragments Projects on recaptures of banded birds in an Amazonian forest bisected by a road. For a total of 45 species, we estimated flight efficiency using the hand-wing index (a proxy for the wing's aspect ratio) and used it as a predictor of the probability of road crossing in phylogenetic binomial regression models. We found that flight efficiency was a strong predictor of road-crossing probability: species with high hand-wing indices crossed the road more frequently than those with low hand-wing indices. In contrast, other characteristics such as body mass, diet, flocking behavior, and foraging stratum did not show significant associations with road crossing probability. Our results suggest that proxies of flight efficiency such as the hand-wing index can be powerful tools for predicting the vulnerability of bird species to forest fragmentation.</p>
Low conversion efficiency of flight power increases with speed in the migratory bat Nathusius' pipistrelle
<p>The efficiency with which flying animals convert metabolic fuel to mechanical power dictates an individual's flight behaviour and energy requirements. Despite the significance of this parameter, we lack empirical data on conversion efficiency for most species. Furthermore, the assumption that efficiency is constant across flight speeds has yet to be empirically confirmed, revealing a major outstanding question in animal flight. We show, through direct measurements of metabolic and aerodynamic power, that conversion efficiency in the migratory bat (<em>Pipistrellus nathusii</em>) increases with flight speed between 7.0 and 10.4%. Our findings suggest that peak conversion efficiency in this species occurs near maximum range speed, where the cost of transport is minimized. A meta-analysis of 16 bird and 8 bat species revealed a strong scaling relationship between estimated conversion efficiency and body mass, with no discernible differences between bats and birds. This has profound consequences for modelling flight behaviour as estimates assuming 23% efficiency underestimate flight costs for <em>P. nathusii</em> by almost 50% on average (36-62%). Our findings suggest that conversion efficiency may vary around an ecologically relevant optimum speed and provides a crucial baseline for investigating how this may drive the variation in conversion efficiency between species.</p>
Data from: Observational and experimental evidence that rapid mass loss is consistent with the flight efficiency hypothesis and not caused by reproductive effort in three passerine species
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Low conversion efficiency of flight power increases with speed in the migratory bat Nathusius’ pipistrelle
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The effect of flight efficiency on gap‐crossing ability in Amazonian forest birds
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Adaptive morphing of wing and tail for stable, resilient, and energy-efficient flight of avian-informed drones
<p>This repository contains the code and data collected during the experiments described in the paper "Adaptive morphing of wing and tail for stable, resilient, and energy-efficient flight of avian-informed drones".</p> <p>The zip file has the following structure</p> <ul> <li>code (with its own README file)</li> <li>data (flight data of each experiment)</li> <li>video (video of each experiment)</li> </ul>
Data from: Efficiency of lift production in flapping and gliding flight of swifts
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
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.