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• W581981851 startingPage "e0125659" @default.
• W581981851 abstract "Hummingbirds are known to defend food resources such as nectar sources from encroachment by competitors (including conspecifics). These competitive intraspecific interactions provide an opportunity to quantify the biomechanics of hummingbird flight performance during ecologically relevant natural behavior. We recorded the three-dimensional flight trajectories of Ruby-throated Hummingbirds defending, being chased from and freely departing from a feeder. These trajectories allowed us to compare natural flight performance to earlier laboratory measurements of maximum flight speed, aerodynamic force generation and power estimates. During field observation, hummingbirds rarely approached the maximal flight speeds previously reported from wind tunnel tests and never did so during level flight. However, the accelerations and rates of change in kinetic and potential energy we recorded indicate that these hummingbirds likely operated near the maximum of their flight force and metabolic power capabilities during these competitive interactions. Furthermore, although birds departing from the feeder while chased did so faster than freely-departing birds, these speed gains were accomplished by modulating kinetic and potential energy gains (or losses) rather than increasing overall power output, essentially trading altitude for speed during their evasive maneuver. Finally, the trajectories of defending birds were directed toward the position of the encroaching bird rather than the feeder." @default.
• W581981851 created "2016-06-24" @default.
• W581981851 creator A5000546019 @default.
• W581981851 creator A5011269909 @default.
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• W581981851 date "2015-06-03" @default.
• W581981851 modified "2023-09-29" @default.
• W581981851 title "Field Flight Dynamics of Hummingbirds during Territory Encroachment and Defense" @default.
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• W581981851 doi "https://doi.org/10.1371/journal.pone.0125659" @default.
• W581981851 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4454523" @default.
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• W581981851 hasPublicationYear "2015" @default.
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