Results 51 to 60 of about 8,422 (237)
A new species of Amphitecna (Bignoniaceae) endemic to the mountain karst forests of southern Mexico
Nordic Journal of Botany, EarlyView.Amphitecna brevicalyx (Bignoniaceae), a new tree species endemic to Mexico is described and illustrated. Its cauliflorous inflorescences, featuring a single flower per shoot and funnelform corollas without a transverse fold in the throat, place it within the Amphitecna macrophylla group.
Leopoldo Hurtado‐Reveles +1 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
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
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Taxonomy and diversity of Marcgraviaceae, north of the São Francisco river, northeast Brazil
Nordic Journal of Botany, EarlyView.This study provides a comprehensive assessment of Marcgraviaceae species diversity north of the São Francisco river in northeastern Brazil, analyzing species richness and distribution patterns across 384 000 km² of phytogeographic domains. Through field collections, herbarium studies (both physical and digital), and detailed morphological analyses, we ...
Thales Carvalho +4 more
wiley +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
Oikos, EarlyView.Due to the constraints of limited effort and sampling error, observed species interaction networks are an imperfect representation of the ‘true' underlying community. Link prediction methods allow us to construct a potentially more complete representation of a given empirical network by guiding targeted sampling of predicted links, as well as offer ...
Grant Foster, Tad A. Dallas
wiley +1 more source
Oikos, EarlyView.Seasonal environmental cycles affect plant–pollinator interactions by altering plant phenology. Periods of low resource availability can filter pollinators and reduce the complexity of interaction networks, but the extent to which the functional morphology of pollinators influences such filtering remains unclear.
Ugo M. Diniz +3 more
wiley +1 more source
Oikos, EarlyView.The ability of plants to attract pollinators is context‐dependent, influenced by floral traits, abundance, and resources from the plant community. Indirect interactions through shared pollinators, from competition to facilitation, may lead to varied reproductive outputs in plants, and the mechanisms behind these interactions remain to be fully ...
Marsal D. De Amorim +6 more
wiley +1 more source
Revista Chilena de Historia Natural, 2007 Nectar-feeding birds oscillate between avoiding overhydration when they are feeding and preventing dehydration during fasts. Here, we examined how resting rates of total evaporative water loss (TEWL) and metabolic water production (MWP) influence water ...
BRADLEY HARTMAN BAKKEN, PABLO SABAT
doaj