Results 21 to 30 of about 30,033 (263)

Take-off mechanics in hummingbirds (Trochilidae) [PDF]

open access: yes, 2004
Initiating flight is challenging, and considerable effort has focused on understanding the energetics and aerodynamics of take-off for both machines and animals.
Altshuler, Douglas L.   +2 more
core   +2 more sources

Hummingbird–Plant Interactions Are More Specialized in Forest Compared to Coffee Plantations

open access: yesDiversity, 2020
Deforestation transforms habitats, displacing vertebrates and the other dimensions of biodiversity they support through their interactions. Few empirical studies have quantified the effect deforestation has on vertebrate–pollinator interaction networks ...
Beth M. L. Morrison, Chase D. Mendenhall
doaj   +1 more source

Accelerational Implications of Hummingbird Display Dives [PDF]

open access: yes, 1995
Integrative ...
Dudley, Robert, Larimer, James L.
core   +1 more source

Hovering hummingbird wing aerodynamics during the annual cycle. II. Implications of wing feather moult [PDF]

open access: yesRoyal Society Open Science, 2018
Birds usually moult their feathers in a particular sequence which may incur aerodynamic, physiological and behavioural implications. Among birds, hummingbirds are unique species in their sustained hovering flight.
Yonathan Achache   +2 more
doaj   +1 more source

Can scalable design of wings for flapping wing micro air vehicle be inspired by natural flyers? [PDF]

open access: yes, 2018
Lift production is constantly a great challenge for flapping wing micro air vehicles (MAVs). Designing a workable wing, therefore, plays an essential role. Dimensional analysis is an effective and valuable tool in studying the biomechanics of flyers.
Chen, Yi   +4 more
core   +1 more source

A perception-action strategy for hummingbirds [PDF]

open access: yes, 2010
Many human and animal tasks are thought to be controlled with the tau informational variable. It is widely accepted that controlling the rate of change of tau during decelerative tasks, such as when braking or landing, is one common perceptual control ...
Delafield-Butt, Jonathan   +3 more
core   +2 more sources

Early stages of speciation with gene flow in the Amazilia Hummingbird (Amazilis amazilia) subspecies complex of Western South America

open access: yesEcology and Evolution, 2022
Disentangling the factors underlying the diversification of geographically variable species with a wide geographical range is essential to understanding the initial stages and drivers of the speciation process. The Amazilia Hummingbird, Amazilis amazilia,
Sarah A. Cowles   +4 more
doaj   +1 more source

Response of pollinator taxa to fire is consistent with historic fire regimes in the Sierra Nevada and mediated through floral richness†

open access: yesEcology and Evolution, 2023
Many fire‐prone forests are experiencing wildfires that burn outside the historical range of variation in extent and severity. These fires impact pollinators and the ecosystem services they provide, but how the effects of fire are mediated by burn ...
Gina L. Tarbill   +2 more
doaj   +1 more source

Effects of a snowstorm event on the interactions between plants and hummingbirds: fast recovery of spatio-temporal patterns

open access: yesRevista Mexicana de Biodiversidad, 2011
The global climatic change could cause, in some places, appearance of meteorological phenomena considered rare. If we understand the effect of these phenomena on birds we can understand how birds respond to weather changes. We report here the effect of a
Román Díaz-Valenzuela   +1 more
doaj   +1 more source

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