Results 31 to 40 of about 30,033 (263)
Global Trends in the Status of Bird and Mammal Pollinators [PDF]
, 2015 Biodiversity is declining, with direct and indirect effects on ecosystem func-tions and services that are poorly quantified. Here, we develop the first globalassessment of trends in pollinators, focusing on pollinating birds and mam-mals.
Barnosky +40 more
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Vocal Communication in Hummingbirds [PDF]
Brain, Behavior and Evolution, 2022 Hummingbirds exhibit complex vocal repertoires that they use in their social interactions. Furthermore, they are capable of vocal production learning, an ability they share with songbirds, parrots, some non-oscine birds, and some mammals including humans.
Fernanda G. Duque, Laura L. Carruth
openaire +2 more sources
Rotational accelerations stabilize leading edge vortices on revolving fly wings [PDF]
, 2009 The aerodynamic performance of hovering insects is largely explained by the presence of a stably attached leading edge vortex (LEV) on top of their wings. Although LEVs have been visualized on real, physically modeled, and simulated insects, the physical
Dickinson, Michael H., Lentink, David
core +2 more sources
Are the New World hummingbird‐hawkmoths functional equivalents of hummingbirds?
Ecology, 2020 Embrapa Cerrados: 014.16.04.001.00 ...
openaire +5 more sources
Adaptation to hummingbird pollination is associated with reduced diversification in Penstemon
Evolution Letters, 2019 A striking characteristic of the Western North American flora is the repeated evolution of hummingbird pollination from insect‐pollinated ancestors. This pattern has received extensive attention as an opportunity to study repeated trait evolution as well
Carolyn A. Wessinger +2 more
doaj +1 more source
Education Policy Analysis Archives, 2019 This article examines the role of Indigenous knowledges in higher education through an exploration of internationalization at U.S. Tribal Colleges and Universities (TCUs).
Elizabeth Alva Sumida Huaman +2 more
doaj +1 more source
Many Central American hummingbirds can be aged and sexed by molt patterns and bill corrugations
Journal of Field Ornithology, 2023 We document molt extent; age-specific molt patterns, plumages, and percent of the bill with corrugations; the presence or absence of delayed plumage maturation and bill color changes in males of some species; and molt timing in the 19 resident ...
Blaine H Carnes, Abidas Ash
doaj +1 more source
Salt intake and regulation in two passerine nectar drinkers: white-bellied sunbirds and New Holland honeyeaters [PDF]
, 2012 Avian nectarivores face the dilemma of having to conserve salts while consuming large volumes of a dilute, electrolyte-deficient diet. This study evaluates the responses to salt solutions and the regulation of salt intake in white-bellied sunbirds ...
Fleming, P.A. +2 more
core +2 more sources
Observation of Topological Chirality Switching Induced Freezing of a Skyrmion Crystal
Advanced Materials, EarlyView.Using Lorentz Transmission electron microscopy, it is shown that in the insulating van der Waals ferromagnet, CrBr3, a magnetic field can cause Bloch skyrmionic bubbles to spontaneously switch their chirality. As achiral type‐II bubbles are an intermediate state, the bubbles rapidly elongate and shrink when switching, thereby inducing a freezing of the
John Fullerton +10 more
wiley +1 more source
Frontiers in Genetics, 2019 Animal-mediated pollination is essential for the maintenance of plant reproduction, especially in tropical ecosystems, where pollination networks have been thought to have highly generalized structures.
Felipe Torres-Vanegas +7 more
doaj +1 more source