Results 11 to 20 of about 5,753 (220)

Vocal dimorphism in Anna's hummingbirds

open access: yesJournal of Avian Biology
Sexual 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   +2 more sources

Hummingbird foraging preferences during extreme heat events

open access: yesEcology and Evolution, 2023
Climate change is projected to increase global mean annual temperatures as well as the frequency and intensity of extreme heat events. These changes are anticipated to alter the behavior of animals as they seek to thermoregulate in extreme heat.
Sabina Lucke Lawrence, Jenny Hazlehurst
doaj   +1 more source

Comparative chromosome painting in hummingbirds (Trochilidae) [PDF]

open access: yesGenetics and Molecular Biology, 2020
Hummingbirds (Trochilidae) are one of the most enigmatic avian groups, and also among the most diverse, with approximately 360 recognized species in 106 genera, of which 43 are monotypic.
Tiago Marafiga Degrandi   +9 more
doaj   +1 more source

Aspect Ratio Effects on the Aerodynamic Performance of a Biomimetic Hummingbird Wing in Flapping

open access: yesBiomimetics, 2023
Hummingbirds are flapping winged creatures with unique flight mechanisms. Their flight pattern is more similar to insects than other birds. Because their flight pattern provides a large lift force at a very small scale, hummingbirds can remain hovering ...
Yilong Min   +3 more
doaj   +1 more source

Dying for love: Illegal international trade in hummingbird love charms

open access: yesConservation Science and Practice, 2022
Hummingbirds (family Trochilidae) are among the most recognizable groups of birds, due to their tiny size, supremely maneuverable flight, and iridescent plumage.
Pepper W. Trail
doaj   +1 more source

Pollinator effectiveness in the mixed-pollination system of a Neotropical Proteaceae, Oreocallis grandiflora

open access: yesJournal of Pollination Ecology, 2021
In pollination systems with a diverse community of floral visitors, qualitative and quantitative variations in pollination effectiveness can lead to a system in which higher effectiveness results from the synergetic contribution of multiple pollinators ...
Santiago Cárdenas-Calle   +7 more
doaj   +1 more source

Floral resource availability of Dicliptera squarrosa (Acanthaceae) and its dependence on hummingbirds for fruit formation in a forest fragment of Central Brazil [PDF]

open access: yesPlant Ecology and Evolution, 2019
Background and aims – Hummingbirds are dependent and specialized on nectar-feeding, and many plants depend upon them for pollination. However, the degree of plant-pollinator interdependence varies greatly among species; thus, information on plant mating ...
Raphael Matias   +3 more
doaj   +3 more sources

Visual Sensory Signals Dominate Tactile Cues during Docked Feeding in Hummingbirds

open access: yesFrontiers in Neuroscience, 2017
Animals living in and interacting with natural environments must monitor and respond to changing conditions and unpredictable situations. Using information from multiple sensory systems allows them to modify their behavior in response to their dynamic ...
Benjamin Goller   +4 more
doaj   +1 more source

Current contrasting population trends among North American hummingbirds

open access: yesScientific Reports, 2021
As pollinators, hummingbirds play a critical role for both the function of ecological communities and in providing ecosystem services for people. To examine the conservation status of North American hummingbirds, we analyzed Breeding Bird Survey data for
Simon G. English   +3 more
doaj   +1 more source

Evaluation of Proctophyllodes huitzilopochtlii on feathers from Anna's (Calypte anna) and Black-chinned (Archilochus alexandri) Hummingbirds: Prevalence assessment and imaging analysis using light and tabletop scanning electron microscopy.

open access: yesPLoS ONE, 2018
Proctophyllodes huitzilopochtlii Atyeo & Braasch 1966 (Acariformes: Astigmata: Proctophyllodidae), a feather mite, was found on feathers collected from five hummingbird species in California.
Youki K Yamasaki   +7 more
doaj   +1 more source

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