Results 21 to 30 of about 13,903 (223)

Bird Census Data Do Not Indicate a Lack of Impact on Songbirds From the Growth of Avian Predator Populations in Britain in the Late 20th Century

open access: yesFrontiers in Ecology and Evolution, 2020
The possible role of avian predators in limiting songbird populations has been largely discounted since the publication of findings showing a lack of statistical association in United Kingdom bird census data between changes in prey species populations ...
Christopher Paul Bell
doaj   +1 more source

Blocking Opioid Receptors in a Songbird Cortical Region Modulates the Acoustic Features and Levels of Female-Directed Singing

open access: yesFrontiers in Neuroscience, 2020
The organization of the anterior forebrain pathway (AFP) of songbirds important for context-dependent singing is similar to that of cortical basal ganglia loops (CBG) in mammals, which underlie motor behaviors including vocalization.
Sandeep Kumar   +8 more
doaj   +1 more source

The Role of the Endogenous Opioid System in the Vocal Behavior of Songbirds and Its Possible Role in Vocal Learning

open access: yesFrontiers in Physiology, 2022
The opioid system in the brain is responsible for processing affective states such as pain, pleasure, and reward. It consists of three main receptors, mu- (μ-ORs), delta- (δ-ORs), and kappa- (κ-ORs), and their ligands – the endogenous opioid peptides ...
Utkarsha A. Singh, Soumya Iyengar
doaj   +1 more source

Adaptive strategies in nocturnally migrating insects and songbirds: contrasting responses to wind. [PDF]

open access: yes, 2015
1. Animals that use flight as their mode of transportation must cope with the fact that their migration and orientation performance is strongly affected by the flow of the medium they are moving in, i.e. by the winds. Different strategies can be used to
Alerstam, T   +24 more
core   +2 more sources

The Asian songbird crisis

open access: yesCurrent Biology, 2022
Alexander Lees and Pramana Yuda introduce the songbird trade of Southern and Eastern Asia that is a major threat to regional bird populations.
Lees, Alexander C, Yuda, Pramana
openaire   +3 more sources

The Gene Expression Profile of the Song Control Nucleus HVC Shows Sex Specificity, Hormone Responsiveness, and Species Specificity Among Songbirds

open access: yesFrontiers in Neuroscience, 2021
Singing occurs in songbirds of both sexes, but some species show typical degrees of sex-specific performance. We studied the transcriptional sex differences in the HVC, a brain nucleus critical for song pattern generation, of the forest weaver (Ploceus ...
Meng-Ching Ko   +3 more
doaj   +1 more source

Investigating Behavioral Responses to Mirrors and the Mark Test in Adult Male Zebra Finches and House Crows

open access: yesFrontiers in Psychology, 2021
Earlier evidence suggests that besides humans, some species of mammals and birds demonstrate visual self-recognition, assessed by the controversial “mark” test. Whereas, there are high levels of inter-individual differences amongst a single species, some
Pooja Parishar   +2 more
doaj   +1 more source

Lingual articulation in songbirds [PDF]

open access: yesJournal of Experimental Biology, 2015
Lingual articulation in humans is one of the primary means of vocal tract resonance filtering that produces the characteristic vowel formants of speech. In songbirds, the function of the tongue in song has not been thoroughly examined, although recent research has identified the oropharyngeal-esophageal cavity as a resonance filter that is actively ...
Roderick A, Suthers   +2 more
openaire   +2 more sources

Scale and Sensitivity of Songbird Occurrence to Landscape Structure in a Harvested Boreal Forest

open access: yesAvian Conservation and Ecology, 2005
To explore the spatial scales at which boreal forest birds respond to landscape structure and how those responses are influenced by forest harvest, we quantified the relationship between amounts of forest in the landscape at multiple spatial scales and ...
Philip D. Taylor, Meg A. Krawchuk
doaj   +1 more source

A Molecular Assessment of the Taxonomy of Iranian Sylvia Warblers (Aves; Sylviidae) [PDF]

open access: yesJournal of Genetic Resources, 2019
The largest genus in the Sylviidae family is Sylvia, which is the archetype for warblers. It contains up to 28 species that are distributed in the Old World. Here, we study Iranian Sylvia using cytochrome c oxidase subunit 1 (cox1) and cytochrome b (cytb)
Raziyeh Abdilzadeh   +2 more
doaj   +1 more source

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