Familiarity and homogeneity affect the discrimination of a song dialect

Animal Behaviour, Journal Year: 2024, Volume and Issue: 209, P. 9 - 20

Published: Jan. 15, 2024

Male songbirds of many species sing local song dialects that are restricted to defined geographical areas. In most tests responses versus foreign dialects, males respond more aggressively songs from their own dialect, presumably because represent a threat success. We asked how hearing during development and territory establishment affects discrimination the dialect in wild Savannah sparrows, Passerculus sandwichensis. After had been heard loudspeakers study area at least two consecutive breeding seasons, reduced intensity version population-specific buzz segment song. Four years after were last broadcast on area, again responded buzz. As for basis these responses, we found no evidence birds discriminated among by comparing them songs. However, auditory experience with song, whether (from speaker-simulated tutors) or current season neighbours' songs), birds' type. Both familiarity, form type, homogeneity, when type is sung all nearly population, appear contribute heightened aggressive dialect.

Language: Английский

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Effects of age, breeding strategy, population density, and number of neighbors on territory size and shape in Passerculus sandwichensis (Savannah Sparrow)

Ornithology, Journal Year: 2024, Volume and Issue: unknown

Published: June 1, 2024

ABSTRACT The size and shape of an animal’s breeding territory are dynamic features influenced by multiple intrinsic extrinsic factors can have important implications for survival reproduction. Quantitative studies variation in these generate deeper insights into animal ecology behavior. We explored the effect age, strategy, population density, number neighbors on territories island Passerculus sandwichensis (Savannah Sparrow). Our dataset consisted 407 belonging to 225 males sampled over 11 years. compared sizes age male territorial holder, male’s reproductive strategy (monogamy vs. polygyny), birds study (population density), immediate (local density). found substantial size, with ranging two orders magnitude from 57 5,727 m2 (0.0057–0.57 ha). Older had larger territories, polygynous were smaller years higher associated more neighbors. also shape, near-circular irregularly shaped territories. Males but did not vary or density. For that lived 2 longer, we strong consistent individual differences across years, weaker suggesting has high repeatability whereas low repeatability. work provides evidence songbird highly dynamic, their reflect both (age partners) density neighbors).

Language: Английский

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Local and range-wide distribution of song types suggest Ovenbirds (Seiurus aurocapilla) have song neighborhoods but not macro-dialects

Avian Research, Journal Year: 2023, Volume and Issue: 14, P. 100096 - 100096

Published: Jan. 1, 2023

Language: Английский

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Passive acoustic monitoring provides predictable and reliable underestimates of population size and longevity in wild Savannah Sparrows

Ornithological Applications, Journal Year: 2022, Volume and Issue: 124(3)

Published: April 19, 2022

Abstract Many breeding birds produce conspicuous sounds, providing tremendous opportunities to study free-living through acoustic recordings. Traditional methods for studying population size and demographic features depend on labor-intensive field research. Passive monitoring provides an alternative method quantifying parameters, but this approach requires careful validation. To determine the accuracy of passive estimating we used autonomous recorders sample island-living Savannah Sparrows (Passerculus sandwichensis) over a 6-year period. Using individually distinctive songs males, estimated male as number unique detected in We analyzed across 6 years estimate birth year, death longevity. then compared estimates with data blind analysis. Estimates were, average, 72% true size, higher lower-density years. rates were lower than values by 29% 23% This is first investigation longevity adds growing studies that have size. Although underestimated likely due high similarity among many songs, our findings suggest can provide reliable wild songbird.

Language: Английский

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Acoustic signalling and subspecies divergence in two Australasian treecreepers (Climacteridae)

Published: Jan. 1, 2024

Australasian treecreepers have diversified into most woodland habitats throughout Australia, yet little is known about the mechanisms behind this diversification at intra-species level. This thesis explored morphometrics, systematics, acoustics, and behaviour of two treecreeper species (Climacteris picumnus Cormobates leucophaea) to identify potential leading subspecies divergence. The results project identified that geographic isolation, not bird song, responsible for divergence in both species. These provided a better understanding biology C. Co. leucophaea provide valuable insight evolution Australia’s

Language: Английский

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Divergent tunes: exploring dialects in Great Reed Warbler song pattern

Journal of Ornithology, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 8, 2024

Abstract In most songbirds, there is geographic variability in their songs, and for some of these species, populations display unique vocal characteristics that can be used to identify the origin individual birds, i.e., dialects. Although studies indicate significant role dialects bird behaviour, majority species remain largely unexplored this regard. paper, we investigate whether occur behaviour Great Reed Warbler ( Acrocephalus arundinaceus )—a model birdsong sexual selection. study, analyze ten populations, ranging distance from 6 410 km. We test hypotheses (i) differ (ii) differences between increase with separates breeding grounds. The results our research confirmed both hypotheses. Each population had characteristic whistles or specific combinations, allowing males assigned they originated based on song. also demonstrated between-population variation syllable repertoire increases populations. greatest similarities composition among separated by less than 50 km which may result individuals moving closely located thereby sharing vocalisations. As increases, likelihood migration decreases, turn favors emergence distinct elements song each population.

Language: Английский

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Biodiversity and the importance of insect diversity

Elsevier eBooks, Journal Year: 2023, Volume and Issue: unknown, P. 19 - 46

Published: Sept. 15, 2023

Language: Английский

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Foreign–local microdialect discrimination in a songbird, the black redstart

Animal Behaviour, Journal Year: 2024, Volume and Issue: 210, P. 113 - 125

Published: Feb. 21, 2024

Language: Английский

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Birds respond more strongly to locally common versus locally rare songs: a playback experiment with Savannah sparrows

Animal Behaviour, Journal Year: 2024, Volume and Issue: 212, P. 127 - 135

Published: April 27, 2024

Language: Английский

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An Investigation of the Song Complexity of Toutouwai (Petroica longipes)

Published: May 13, 2023

<p>In this thesis, I examined the complexity of song repertoires in endemic North Island robin (Petroica longipes), a highly territorial species. Focussing on males population found Zealandia, Karori Wildlife Sanctuary, first tested function by looking for evidence dear enemy effect (reduced aggressiveness an individual’s response to neighbouring heterospecifics compared non-neighbours) within my study population. There was significant difference responses neighbour and non-neighbour songs playback experiment, supporting effect. then investigated overall identifying evaluating phrases that they use songs. show robins have rich appear be stable across time population, based data from 2015 2021/ 2022. However, measures used there is no support hypothesis more complex are correlated with male’s reproductive success.</p>

Language: Английский

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