Teleological Essentialism: Generalized [PDF]
, 2020 Natural/social kind essentialism is the view that natural kind categories, both living and non-living natural kinds, as well as social kinds (e.g., race, gender), are essentialized. On this view, artifactual kinds are not essentialized.
Keil F. C. +5 more
core +1 more source
Mask R-CNN Refitting Strategy for Plant Counting and Sizing in UAV Imagery
Remote Sensing, 2020 This work introduces a method that combines remote sensing and deep learning into a framework that is tailored for accurate, reliable and efficient counting and sizing of plants in aerial images.
Mélissande Machefer +4 more
doaj +1 more source
Flight Mechanics and Control of Escape Manoeuvres in Hummingbirds. I. Flight Kinematics [PDF]
, 2016 Hummingbirds are nature’s masters of aerobatic manoeuvres. Previous research shows that hummingbirds and insects converged evolutionarily upon similar aerodynamic mechanisms and kinematics in hovering.
Cheng, Bo +6 more
core +3 more sources
DNA metabarcoding allows non-invasive identification of arthropod prey provisioned to nestling Rufous hummingbirds (Selasphorus rufus) [PDF]
PeerJ, 2019 Hummingbirds consume sugars from nectar, sap and honeydew, and obtain protein, fat and minerals from arthropods. To date, the identity of arthropod taxa in hummingbird diets has been investigated by observation of foraging or examination of alimentary ...
Alison J. Moran +2 more
doaj +2 more sources
Linking Socioeconomics to Biodiversity in the City: The Case of a Migrant Keystone Bird Species
Frontiers in Ecology and Evolution, 2022 Billions of wild animals migrate every year between breeding and non-breeding sites, facing new environmental conditions due to anthropogenic change. Although cities engender profound environmental changes, they provide habitat for some migratory birds ...
Nélida R. Villaseñor +2 more
doaj +1 more source
Of hummingbirds and helicopters: Hovering costs, competitive ability, and foraging strategies [PDF]
, 2004 Wing morphology and flight kinematics profoundly influence foraging costs and the overall behavioral ecology of hummingbirds. By analogy with helicopters, previous energetic studies have applied the momentum theory of aircraft propellers to estimate ...
Altshuler, Douglas L. +2 more
core +1 more source
Influence of plant reproductive systems on the evolution of hummingbird pollination
Ecology and Evolution, 2022 Many hummingbird‐pollinated plant species evolved from bee‐pollinated ancestors independently in many different habitats in North and South America. The mechanisms leading to these transitions are not completely understood.
Stefan Abrahamczyk +6 more
doaj +1 more source
Resolution of a paradox: Hummingbird flight at high elevation does not come without a cost [PDF]
, 2004 Flight at high elevation is energetically demanding because of parallel reductions in air density and oxygen availability. The hovering flight of hummingbirds is one of the most energetically expensive forms of animal locomotion, but hummingbirds are ...
Altshuler, Douglas L. +2 more
core +3 more sources
Aspects of the reproductive biology of Zingiber spectabile (Zingiberaceae)
Revista Ceres, 2021 Ginger (Zingiber spectabile) is cultivated worldwide as a floriculture and landscaping species. Studies on the biology and floral morphology of this species are important for its improvement; however, they are scarce.
Kamilla Ferreira Rezende +4 more
doaj +1 more source
Robotic Hummingbird Axial Dynamics and Control near Hovering: A Simulation Model
Actuators, 2023 After a short overview of the COLIBRI project, this paper considers the cycle-averaged flight dynamics of a flapping-wing robot near hovering, taking advantage of the weak coupling between the roll and pitch axes.
Yousef Farid +5 more
doaj +1 more source