Results 61 to 70 of about 8,636 (240)
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
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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
Experimental Studies of Tail Shapes for Hummingbird-Like Flapping Wing Micro Air Vehicles
IEEE Access, 2020 The stability of flying of a hummingbird-like flapping-wing micro air vehicle (MAV) has been challenging. In this paper, experimental studies are reported on the tail shapes of hummingbird-like flapping-wing MAVs, since tails play an important role in ...
Yanghai Nan +3 more
doaj +1 more source
New Phytologist, EarlyView.Hummingbird pollination is a hallmark of American plant diversity and has long been thought to evolve in tropical mountains due to declining bee activity. Using sister species of Costus specialized on bees (C. kuntzei) and hummingbirds (C. wilsonii), we show that this shift is not driven by reduced bee visitation with elevation, but by greater ...
Pedro Juárez +7 more
wiley +1 more source
Resilience of floral scent emission after florivory
Plant Biology, EarlyView.Florivory is thought to affect floral traits, impacting pollination. However, our data suggest a stability in post‐florivory scent emission, which may guarantee the maintenance of pollinator visitation regardless of florivory, indicating a resilience of natural systems with multiple and simultaneous interactions. Created in BioRender. Tunes, P.
P. Tunes +4 more
wiley +1 more source
Ecology and Evolution, Volume 16, Issue 7, July 2026.We evaluated nectar robbery by native and invasive bumblebees in the hummingbird‐pollinated shrub Desfontainia fulgens in southern Chile. Nectar robbery strongly reduced nectar standing crop and altered floral visitation patterns, but these proximate effects did not translate into reduced seed production under natural pollination conditions.
Carlos E. Valdivia, José I. Orellana
wiley +1 more source
, 2022 UN agencies undertake project for better statistics … via SDG data development in Trinidad and Tobago. -- A Hummingbird feature: Belize benefits from national consultations with ECLAC Caribbean and UN DESA.
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Concentrations of Retinol and α-Tocopherol in Tissue Samples From Anna's Hummingbirds (Calypte anna)
Frontiers in Veterinary Science, 2020 Retinol (vitamin A) and α-tocopherol (vitamin E) concentrations were measured in tissue samples (liver, heart, pectoral muscle, and brain) from Anna's Hummingbirds (Calypte anna).
Stephanie M. Diao +6 more
doaj +1 more source
Generalist passerine birds perform a functional role as pollinators in temperate Europe
Journal of Ecology, Volume 114, Issue 7, July 2026.Nectar‐feeding birds are effective pollinators. In temperate Europe, songbirds visit flowers but lack specialist traits, so functional pollination has been discounted. We use observations, pollen identification and experiments to demonstrate that generalist birds affect fruit‐set of flowering trees.
Sandra H. Anderson +2 more
wiley +1 more source
, 2022 Dominica workshop discusses climate change and disaster indicators. -- A Hummingbird feature: Launch of ECLAC flagship report, Economic Survey of Latin America and the Caribbean.
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