Eastern Meadowlark (Sturnella magna)

2020 ◽  
Author(s):  
Levi A. Jaster ◽  
William E. Jensen ◽  
Wesley E. Lanyon
Keyword(s):  
Sturnella Magna

Postfledging Movements and Survival of Juvenile Eastern Meadowlarks (Sturnella magna) in Illinois

The Auk ◽  
2004 ◽  
Vol 121 (4) ◽  
pp. 1146-1154 ◽  
Author(s):  
Eric L. Kershner ◽  
Jeffery W. Walk ◽  
Richard E. Warner
Keyword(s):  
Sturnella Magna

The Present Status of the Meadowlark (Sturnella magna) near Portland, Maine

The Auk ◽  
1909 ◽  
Vol 26 (3) ◽  
pp. 307-308
Author(s):  
Arthur H. Norton
Keyword(s):  
Present Status ◽  
Sturnella Magna

SONG CLUSTERING BY MEADOWLARKS: IS IT RELATED TO REPERTOIRE SIZE?

Behaviour ◽  
2000 ◽  
Vol 137 (1) ◽  
pp. 75-92 ◽  
Author(s):  
◽  
◽  
◽  
◽  
Keyword(s):  
Pca Analysis ◽  
Repertoire Size ◽  
Free Living ◽  
Similar Correlation ◽  
Sturnella Magna ◽  
Different Types ◽  
Song Types ◽  
Song Repertoires

AbstractSome birds with song repertoires sequentially associate (or cluster) songs of different types. That is, certain song types may occur together repeatedly, even on different days. We determined whether clustering of meadowlark songs correlated with repertoire size. We also tested whether clustered songs reflect either their structural similarities, or dissimilarities. Our data were obtained from recordings of free-living individuals of two meadowlark species, eastern, Sturnella magna , and western, S. neglecta . Eastern meadowlarks have approximately 10 times more song types per bird than do westerns. Therefore, if clustering is related to repertoire size, we predicted that there should be (1) proportionately more song clusters in eastern meadowlarks than in westerns, and (2) a similar correlation across individual birds within a species, especially so in easterns, which have a broader range of repertoire sizes. All 14 easterns examined showed clusters whereas only 5 of 11 westerns did so, and the easterns had proportionately more per bird. Many of the same clusters occurred in different recordings of individual easterns. In easterns, the extent of clustering as measured by a PCA analysis correlated strongly with estimated repertoire size. Clustered songs were neither more similar in structure, nor less so, than randomly-paired songs.

Eastern Meadowlark (Sturnella magna) Eating a Traffic-Killed Bird

The Auk ◽  
1956 ◽  
Vol 73 (2) ◽  
pp. 289-290 ◽  
Author(s):  
John K. Terres
Keyword(s):  
Sturnella Magna

scholarly journals Breeding-Season Decisions, Renesting, and Annual Fecundity of Female Eastern Meadowlarks (Sturnella Magna) in Southeastern Illinois

The Auk ◽  
2004 ◽  
Vol 121 (3) ◽  
pp. 796-805 ◽  
Author(s):  
Eric L. Kershner ◽  
Jeffery W. Walk ◽  
Richard E. Warner
Keyword(s):  
Site Selection ◽  
Population Biology ◽  
Nest Site ◽  
Adult Survival ◽  
Demographic Parameter ◽  
Site Characteristics ◽  
Sturnella Magna ◽  
Double Brooding ◽  
Selection For ◽  
Breeding Seasons

Abstract Annual fecundity is a demographic parameter that is elemental to population biology, but accurate measures of fecundity are rarely obtained. We used radiotelemetry to follow female Eastern Meadowlarks (Sturnella magna) throughout the 1999-2000 breeding seasons in southeastern Illinois to estimate their annual fecundity and assess if the outcome of initial nesting attempts affected site selection for subsequent nests. Thirty-four females built 52 nests (1.53 ± 0.12 nests female−1), but only 21 females (62%) fledged young. Only 44% of females renested at the study site, and more females (53%) emigrated after successfully fledging young from an initial nest than after failing in their first attempt (21%). Nest-site characteristics were similar between successful and failed nests for both initial and subsequent attempts. Females that failed during first attempts did not change nest characteristics for renests. Given that few females were double-brooded and that unsuccessful females did not persistently renest, annual fecundity for females nesting at the study site was between 1.27 ± 0.38 and 1.36 ± 0.37 female young year−1. On the basis of our fecundity measure, we estimated that annual adult survival of 59–61% was necessary for maintenance of a stable population (λ = 1.0). Failure of most females to attempt to raise two broods suggests that double brooding carries substantial costs for meadowlarks.

Eastern Meadowlark (Sturnella magna)

2012 ◽  
Author(s):  
Levi A. Jaster ◽  
William E. Jensen ◽  
Wesley E. Lanyon
Keyword(s):  
Sturnella Magna

Eastern Meadowlark (Sturnella magna)

1995 ◽  
Author(s):  
Wesley E. Lanyon
Keyword(s):  
Sturnella Magna

Variation of repertoire use in the eastern meadowlark, Sturnella magna

1983 ◽  
Vol 61 (5) ◽  
pp. 1086-1093 ◽  
Author(s):  
Lorraine G. d'Agincourt ◽  
J. Bruce Falls
Keyword(s):  
Breeding Season ◽  
Seasonal Trend ◽  
Territorial Defense ◽  
Mate Attraction ◽  
Singing Behavior ◽  
Sturnella Magna ◽  
Males And Females ◽  
Song Types

The singing behavior of nine eastern meadowlark (Sturnella magna) males was examined over the 1980 breeding season for changes in versatility (use of different song types and switching between song types). The greatest degree of versatility occurred during territorial defense; the use of one-song bouts rose from 33.1% during nonchase periods to 64.9% during intraspecific encounters. Versatility also showed a seasonal trend, peaking during courtship and decreasing through the incubation, nestling, and fledgling stages. No relationship was evident between versatility characteristic of a male and the number of females obtained. Thus, while versatility may have increased during encounters with both sexes, it apparently did not influence mate attraction. These results are consistent with the hypothesis that repertoires reduce habituation in listeners. The data also support a derivative explanation that song variety serves as a graded signal indicating the tendency of a singer to interact with other males and females.

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