American Robin

2021 ◽  
pp. 93-94
Author(s):  
Eric V. Johnson
Keyword(s):  
American Robin

Grooming in the veery and the American robin: Evidence for a simple timing hierarchy

1986 ◽  
Vol 12 (3) ◽  
pp. 227-236 ◽  
Author(s):  
Karen K. Hatch ◽  
Louis Lefebvre ◽  
R.E. Lemon
Keyword(s):  
American Robin

scholarly journals Nesting strategy shapes territorial aggression but not testosterone: a comparative approach in female and male birds

2020 ◽  
Author(s):  
SE Lipshutz ◽  
KA Rosvall
Keyword(s):  
Tree Swallow ◽  
Comparative Approach ◽  
Female Competition ◽  
American Robin ◽  
Territorial Aggression ◽  
Physical Attack ◽  
Cavity Nesting ◽  
Comparative Framework ◽  
Underlying Mechanisms ◽  
Close Relatives

Our understanding of the proximate and ultimate mechanisms shaping competitive phenotypes primarily stems from research on male-male competition for mates, even though female-female competition is also widespread. Obligate secondary cavity-nesting has evolved repeatedly across avian lineages, providing a useful comparative context to explore how competition over limited nest cavities shapes aggression and its underlying mechanisms across species. Although evidence from one or another cavity-nesting species suggests that territorial aggression is adaptive in both females and males, this has not yet been tested in a comparative framework. We tested the hypothesis that cavity-nesting generates more robust territorial aggression, in comparison to close relatives with less restrictive nesting strategies. Our focal species were two obligate secondary cavity-nesting species and two related species with more flexible nesting strategies in the same avian family: tree swallow (Tachycineta bicolor) vs. barn swallow (Hirundo rustica); Eastern bluebird (Sialia sialis) vs. American robin (Turdus migratorius). We assayed conspecific territorial aggression, and found that cavity-nesting species physically attacked a simulated intruder more often than their close relatives. This pattern held for both females and males. Because territorial aggression is often associated with elevated testosterone, we also hypothesized that cavity-nesting species would exhibit higher testosterone levels in circulation. However, cavity-nesting species did not have higher testosterone in circulation for either sex, despite some correlative evidence that testosterone is associated with higher rates of physical attack in female tree swallows. Our focus on a competitive context that is relevant to both sexes – competition over essential breeding resources – provides a useful comparative framework for co-consideration of proximate and ultimate drivers of reproductive competition in females and males.

Reproduction of American robin (Turdus migratorius) in a suburban environment

1995 ◽  
Vol 32 (1) ◽  
pp. 55-62 ◽  
Author(s):  
Francois Morneau ◽  
Claire Lépine ◽  
Robert Décarie ◽  
Marc-André Villard ◽  
Jean-Luc DesGranges
Keyword(s):  
Turdus Migratorius ◽  
American Robin ◽  
Suburban Environment

American Robin (Turdus migratorius)

1999 ◽  
Author(s):  
Rex Sallabanks ◽  
Frances C. James
Keyword(s):  
Turdus Migratorius ◽  
American Robin

scholarly journals Quantification of 27 yolk steroid hormones in seven shrubland bird species: interspecific patterns of hormone deposition and links to life history, development, and predation risk

2019 ◽  
Vol 97 (1) ◽  
pp. 1-12 ◽  
Author(s):  
L. Merrill ◽  
S.J. Chiavacci ◽  
R.T. Paitz ◽  
T.J. Benson
Keyword(s):  
Life History ◽  
Predation Risk ◽  
Steroid Hormones ◽  
High Performance ◽  
Bird Species ◽  
Principal Component ◽  
Interspecific Variation ◽  
American Robin ◽  
Nestling Development ◽  
Yolk Steroids

Steroid hormones play critical organizational and activational roles during vertebrate development, impacting everything from sexual differentiation to metabolic activity. For oviparous species such as birds, these hormones are transferred from female to egg during follicle maturation, and differences in relative and absolute concentrations of the steroid hormones may reflect differences in life history, developmental, and ecological conditions. Prior work on yolk steroid hormones has focused on a handful of candidate hormones (e.g., testosterone, androstenedione, and corticosterone), but we used high-performance liquid chromatography with tandem mass spectroscopy (LC–MS–MS) to quantify 27 yolk steroids from the eggs of seven shrubland bird species (American Robin, Turdus migratorius Linnaeus, 1766; Brown-headed Cowbird, Molothrus ater (Boddaert, 1783); Brown Thrasher, Toxostoma rufum (Linnaeus, 1758); Eastern Towhee, Pipilo erythrophthalmus (Linnaeus, 1758); Field Sparrow, Spizella pusilla (A. Wilson, 1810); Gray Catbird, Dumetella carolinensis (Linnaeus, 1766); Northern Cardinal, Cardinalis cardinalis (Linnaeus, 1758)). In addition to comparing steroid profiles across species, we conducted exploratory analyses to determine how the hormones clustered using a principal component (PC) approach and if PCs were correlated with aspects of egg resources (relative egg size, proportion yolk), life-history traits (embryonic and nestling development speed), and nest-predation risk (daily survival rate (DSR)). We documented substantial interspecific variation in both absolute and proportional endocrine profiles. PCAs indicated that glucocorticoids generally clustered together (PC1), but other classes of steroids did not. PC2 and PC3 strongly covaried with egg resources, DSR, and development speed, suggesting that they reflect adaptive patterns of maternal hormone deposition.

scholarly journals The Influence of Different Cover Types on American Robin Nest Success in Organic Agroecosystems

2013 ◽  
Vol 5 (8) ◽  
pp. 3502-3512 ◽  
Author(s):  
John Quinn ◽  
Amy Oden ◽  
James Brandle
Keyword(s):  
Nest Success ◽  
American Robin

Observations on Remating in the American Robin, Turdus migratorius

The Auk ◽  
1952 ◽  
Vol 69 (4) ◽  
pp. 465-466
Author(s):  
Hervey Brackbill
Keyword(s):  
Turdus Migratorius ◽  
American Robin
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