High aerodynamic lift from the tail reduces drag in gliding raptors

JR Usherwood, JA Cheney, J Song… - Journal of …, 2020 - journals.biologists.com
Many functions have been postulated for the aerodynamic role of the avian tail during steady-
state flight. By analogy with conventional aircraft, the tail might provide passive pitch stability …

Bird wings act as a suspension system that rejects gusts

JA Cheney, JPJ Stevenson… - … of the Royal …, 2020 - royalsocietypublishing.org
Musculoskeletal systems cope with many environmental perturbations without neurological
control. These passive preflex responses aid animals to move swiftly through complex …

Robotic avian wing explains aerodynamic advantages of wing folding and stroke tilting in flapping flight

E Ajanic, A Paolini, C Coster, D Floreano… - Advanced Intelligent …, 2023 - Wiley Online Library
Avian flapping strategies have the potential to revolutionize future drones as they may
considerably improve agility, increase slow speed flight capability, and extend the …

Developments of theories of avian movement strategies in wind and their validation with bio-logging data

Y Goto, K Yoda - Journal of the Physical Society of Japan, 2023 - journals.jps.jp
Animal movement represents an interdisciplinary research field involving ecology and
physics. Animal locomotion is composed of three interrelated hierarchies: micro-scale …

Speed consensus and the 'Goldilocks principle'in flocking birds (Columba livia)

DWE Sankey, ELC Shepard, D Biro, SJ Portugal - Animal Behaviour, 2019 - Elsevier
Highlights•Moving groups must reach speed consensus to retain cohesion and grouping
benefits.•We investigated speed in solo and group flights of homing pigeons using …

Flight activity and effort of breeding pied flycatchers in the wild, revealed with accelerometers and machine learning

H Yu, S Liang, FT Muijres… - Journal of …, 2024 - journals.biologists.com
Flight behaviours of birds have been extensively studied from different angles such as their
kinematics, aerodynamics and, more generally, their migration patterns. Nevertheless, much …

Aerodynamic efficiency explains flapping strategies used by birds

LC Johansson - Proceedings of the National Academy of Sciences, 2024 - pnas.org
A faster cruising speed increases drag and thereby the thrust (T) needed to fly, while weight
and lift (L) requirement remains constant. Birds can adjust their wingbeat in multiple ways to …

Flight in ground effect dramatically reduces aerodynamic costs in bats

LC Johansson, L Jakobsen, A Hedenström - Current Biology, 2018 - cell.com
Most flying animals, from insects to seabirds [1], perform flights close to ground or water
when taking off or landing [2], drinking, and feeding [3–5] or when traveling near water …

Measuring power input, power output and energy conversion efficiency in un-instrumented flying birds

L Hedh, CG Guglielmo, LC Johansson… - Journal of …, 2020 - journals.biologists.com
Cost of flight at various speeds is a crucial determinant of flight behaviour in birds.
Aerodynamic models, predicting that mechanical power (P mech) varies with flight speed in …

The Princeton field guide to pterosaurs

GS Paul - 2022 - torrossa.com
Names: Paul, Gregory S., author. Title: The princeton field guide to pterosaurs/Gregory S.
Paul. Description: Princeton: Princeton University Press,[2022]| Series: Princeton field …