Results 61 to 70 of about 30,033 (263)
TAXON, EarlyView.Abstract We explore phylogenetic relationships within the Pachira sensu lato clade (Bombacoideae, Malvaceae), test the monophyly of the genera Eriotheca and Pachira, and investigate their biogeographic history. The Pachira s.l. clade comprises ca. 72 species that traditionally have been placed in Eriotheca and Pachira. We sampled ca. 79% of its species
Vania Nobuko Yoshikawa +7 more
wiley +1 more source
Vocal dimorphism in Anna's hummingbirds
Journal of Avian BiologySexual dimorphism in vocal signals is found across many bird species. By evaluating correlations among sex, behaviors, and vocalizations, the meaning and utility of sound production may be inferred.
Sierra Ru‐Yi Glassman +2 more
doaj +1 more source
Biology Open, 2016 The stroke-cam flapping mechanism presented in this paper closely mimics the wing motion of a hovering Rufous hummingbird. It is the only lightweight hummingbird-sized flapping mechanism which generates a harmonic wing stroke with both a high flapping ...
Frederik Leys +2 more
doaj +1 more source
, 2003 The purpose of this resource is to observe budburst on selected trees at a Land Cover or Phenology Site. All students will learn about hummingbird natural history and ecology.
The GLOBE Program, University Corporation for Atmospheric Research (UCAR)
core
Preschoolers' Scientific Curiosity and Inquiry Capabilities: An Ecological Research Approach
Journal of Research in Science Teaching, EarlyView.ABSTRACT Existing tools for measuring scientific curiosity often fail to capture its multifaceted, dynamic nature—particularly in early childhood, where behaviors are context‐dependent, non‐verbal, and emergent. These challenges limit our ability to understand and support young children's scientific engagement.
Yael Kesner Baruch +2 more
wiley +1 more source
G3: Genes, Genomes, Genetics, 2020 Hummingbirds in flight exhibit the highest mass-specific metabolic rate of all vertebrates. The bioenergetic requirements associated with sustained hovering flight raise the possibility of unique amino acid substitutions that would enhance aerobic ...
Cory D. Dunn +2 more
doaj +1 more source
Hummingbird plumage color diversity exceeds the known gamut of all other birds
Communications Biology, 2022 An analysis of the plumage colors in 114 hummingbird species finds that the breadth of the hummingbird color gamut exceeds or is equivalent to that of the previous estimate of all living birds.
Gabriela X. Venable +2 more
doaj +1 more source
Neuromuscular control of wingbeat kinematics in Anna's hummingbirds (Calypte anna) [PDF]
, 2010 Hummingbirds can maintain the highest wingbeat frequencies of any flying vertebrate – a feat accomplished by the large pectoral muscles that power the wing strokes. An unusual feature of these muscles is that they are activated by one or a few spikes per
Altshuler, Douglas L. +6 more
core +3 more sources
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract The dependence on biotic pollination may constrain plant phenological responses because flowering time ultimately defines reproductive success. We proposed a local‐scale study combining long‐term phenology and experimental data to evaluate how a key functional trait—the
Amanda Eburneo Martins +3 more
wiley +1 more source
Earth and Space Science, 2022 Cropland mapping is important for monitoring agricultural practices, cropland distribution and for supporting food security programs. Radar remote sensing will likely provide a means of cropland mapping, which can be efficient, accurate, and globally ...
S. Kraatz +5 more
doaj +1 more source