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- Keyword
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- Eumomota superciliosa (3)
- Sexual selection (3)
- Assortative mating (2)
- Elaborate monomorphism (2)
- Mutual ornamentation (2)
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- Tail plumage (2)
- Turquoise-browed Motmot (2)
- American goldfinch (1)
- Antipredator behaviour (1)
- Araneus bicentenarius (1)
- Ave atrapada en telarana (1)
- Bill color (1)
- Bird caught in spider web (1)
- Bird song (1)
- Cheating (1)
- Condition-dependent dynamic signal (1)
- Dishonesty (1)
- Female ornamentation (1)
- Female song (1)
- Giant lichen orb-weaver spider (1)
- Icterus pustulatus (1)
- Painted Bunting (1)
- Passerina ciris (1)
- Predatoreprey communication (1)
- Pursuit-deterrent signalling (1)
- Social experience (1)
- Spinus tristis (1)
- Status signal (1)
- Stress (1)
- Tropical songbird (1)
Articles 1 - 11 of 11
Full-Text Articles in Life Sciences
Painted Bunting (Passerina Ciris) Caught In The Web Of A Giant Lichen Orb-Weaver Spider (Araneus Bicentenarius), Philip Queller, Troy G. Murphy
Painted Bunting (Passerina Ciris) Caught In The Web Of A Giant Lichen Orb-Weaver Spider (Araneus Bicentenarius), Philip Queller, Troy G. Murphy
Troy G Murphy
Orb-weaver spiders weave large webs that are capable of entrapping various species of birds. We report a case of a male Painted Bunting (Passerina ciris) caught in the web of a giant lichen orb-weaver (Araneus bicentenarius). Most cases of bird entrapment in spider webs involve spiders with larger webs (often Nephila sp.) and very small birds, usually hummingbirds. Our case is noteworthy because we report a relatively large bird caught in a relatively small web. Furthermore, the geographic distribution of A. bicentenarius extends beyond the tropics and subtropics, which is where most reported cases of bird …
Dynamic Status Signal Reflects Outcome Of Social Interactions, But Not Energetic Stress, Keith A. Tarvin, L Jin Wong, David C. Lumpkin, Gabrielle M. Schroeder, Dominic D'Andrea, Sophie Meade, Pearl Rivers, Troy G. Murphy
Dynamic Status Signal Reflects Outcome Of Social Interactions, But Not Energetic Stress, Keith A. Tarvin, L Jin Wong, David C. Lumpkin, Gabrielle M. Schroeder, Dominic D'Andrea, Sophie Meade, Pearl Rivers, Troy G. Murphy
Troy G Murphy
Social defeat induces stress-responses in a wide array of vertebrates and can generate winner-loser effects. Dynamic condition-dependent signaling systems that reflect preparation for subsequent agonistic interactions, and thereby mediate winner-loser effects, should be more sensitive to competitive history than to non-social sources of stress. Bill color of female American goldfinches (Spinus tristus) is a dynamic condition-dependent ornament that functions as a signal of competitive status and mediates intrasexual agonistic social interactions. We tested the “social experience signaling hypothesis” in female goldfinches by (1) manipulating a non-social energetic stressor by experimentally elevating flight costs via wing-clipping in free-ranging birds, …
Display Of An Inedible Prop As A Signal Of Aggression? Adaptive Significance Of Leaf-Display By The Turquoise-Browed Motmot, Eumomota Superciliosa, Troy G. Murphy
Troy G Murphy
The incorporation of an inedible object (prop) into a behavioral display is rare among birds. Only four avian taxa have been reported to display with a prop, and in all studied species, prop use has been found to play a role in mate acquisition. However, little is known about the context and adaptive significance of prop use by the motmots. Both male and female motmots perform a leaf-display, whereby a leaf is held horizontally in the tip of the bill for an extended period. I collected observational data on leaf-display by the turquoise-browed motmots (Eumomota superciliosa) to investigate the potential …
Dishonest ‘Preemptive’ Pursuit-Deterrent Signal? Why The Turquoise-Browed Motmot Wags Its Tail Before Feeding Nestlings, Troy G. Murphy
Dishonest ‘Preemptive’ Pursuit-Deterrent Signal? Why The Turquoise-Browed Motmot Wags Its Tail Before Feeding Nestlings, Troy G. Murphy
Troy G Murphy
Both sexes of the turquoise-browed motmot, Eumomota superciliosa, display their long-racketed tail in an exaggerated side-to-side wag display in two contexts. In the first, the wag display is performed in the presence of predators (predator-elicited wag display), and evidence supports the hypothesis that the signal functions as a pursuit-deterrent signal (Murphy 2006, Behavioral Ecology, 17, 547e553). In the second, the wag display is performed in the apparent absence of predators immediately before feeding nestlings (prefeeding wag display). I tested four hypotheses on the adaptive significance of the prefeeding wag display: (1) a dishonest, preemptive, pursuit-deterrent signal given in case predators …
Lack Of Melanized Keratin And Barbs That Fall Off: How The Racketed Tail Of The Turquoise-Browed Motmot Eumomota Superciliosa Is Formed, Troy G. Murphy
Lack Of Melanized Keratin And Barbs That Fall Off: How The Racketed Tail Of The Turquoise-Browed Motmot Eumomota Superciliosa Is Formed, Troy G. Murphy
Troy G Murphy
The racket-tipped tail of the motmots is uniquely shaped and its formation has attracted much attention. Barbs that grow along the wire of the motmot’s two central tail feathers are weakly attached and shed soon after development. The cause of the weak attachment of these barbs is unclear. I induced feather growth by plucking the central tail feathers from seven turquoise-browed motmots Eumomota superciliosa and then collected the regrown feathers before the barbs along the wire had fully shed. I compared the barb-rachis junction (petiole of the ramus) along the distal flag (the racket-tip of the tail) where barbs are …
Sex-Role Reversal In Song? Females Sing More Frequently Than Males In The Streak-Backed Oriole, J. J. Price, L. Yunes-Jimenez, M. Osorio-Beristain, K. E. Omland, Troy G. Murphy
Sex-Role Reversal In Song? Females Sing More Frequently Than Males In The Streak-Backed Oriole, J. J. Price, L. Yunes-Jimenez, M. Osorio-Beristain, K. E. Omland, Troy G. Murphy
Troy G Murphy
Birds in which both sexes produce complex song are more common in the tropics than in the temperate north, where typically only males sing. Yet surprisingly little is known about female song characteristics in most tropical species. Here we present a comparison of female and male singing behaviors in the Streak-backed Oriole (Icterus pustulatus), a tropical songbird in which both sexes perform solo songs. Females sing much more frequently than males and produce songs with similar acoustic complexity. Rates of singing by both sexes were higher during breeding than postbreeding while the rates of most other vocalizations did …
Lack Of Assortative Mating For Tail, Body Size, Or Condition In The Elaborate Monomorphic Turquoise-Browed Motmot (Eumomota Superciliosa), Troy G. Murphy
Lack Of Assortative Mating For Tail, Body Size, Or Condition In The Elaborate Monomorphic Turquoise-Browed Motmot (Eumomota Superciliosa), Troy G. Murphy
Troy G Murphy
Elaborate male and female plumage can be maintained by mutual sexual selection and function as a mate-choice or status signal in both sexes. Both male and female Turquoise-browed Motmot (Eumomota superciliosa) have long tails that terminate in widened blue-and-black rackets that appear to hang, unattached, below the body of the bird. I tested whether mutual sexual selection maintains the Turquoise-browedMotmot’s elaborate tail plumage by testing the prediction that mating occurs in an assortative manner for tail plumage. I also tested whether assortative mating occurs for body size, a potential measure of dominance, and for phenotypic condition, a measure of individual …
Carotenoid-Based Ornaments Of Female And Male American Goldfinches (Spinus Tristis) Show Sex-Specific Correlations With Immune Function And Metabolic Rate, Ryan J. Kelly, Troy G. Murphy, Keith A. Tarvin, Gary Burness
Carotenoid-Based Ornaments Of Female And Male American Goldfinches (Spinus Tristis) Show Sex-Specific Correlations With Immune Function And Metabolic Rate, Ryan J. Kelly, Troy G. Murphy, Keith A. Tarvin, Gary Burness
Troy G Murphy
Conspicuous ornamentation has been linked to immunological and physiological condition in males of many species. In species where both sexes are ornamented, it is unclear whether the signal content of ornaments differs between males and females. We examined the immunological and physiological correlates of carotenoid-based bill and plumage ornamentation in American goldfinches Spinus tristis, a species in which bright orange bills are sexually monomorphic but yellow plumage is sexually dimorphic during the breeding season. Because bill color is dynamic over short periods while plumage color is static over longer time frames, we tested whether these signals have the potential to …
Lack Of Assortative Mating For Tail, Body Size, Or Condition In The Elaborate Monomorphic Turquoise-Browed Motmot (Eumomota Superciliosa), Troy G. Murphy
Lack Of Assortative Mating For Tail, Body Size, Or Condition In The Elaborate Monomorphic Turquoise-Browed Motmot (Eumomota Superciliosa), Troy G. Murphy
Troy G Murphy
Elaborate male and female plumage can be maintained by mutual sexual selection and function as a mate-choice or status signal in both sexes. Both male and female Turquoise-browed Motmot (Eumomota superciliosa) have long tails that terminate in widened blue-and-black rackets that appear to hang, unattached, below the body of the bird. I tested whether mutual sexual selection maintains the Turquoise-browedMotmot’s elaborate tail plumage by testing the prediction that mating occurs in an assortative manner for tail plumage. I also tested whether assortative mating occurs for body size, a potential measure of dominance, and for phenotypic condition, a measure of individual …
Honesty Of A Dynamic Female Aggressive Status Signal: Baseline Testosterone Relates To Bill Color In Female American Goldfinches, T T. Pham, Philip Queller, K A. Tarvin, Troy G. Murphy
Honesty Of A Dynamic Female Aggressive Status Signal: Baseline Testosterone Relates To Bill Color In Female American Goldfinches, T T. Pham, Philip Queller, K A. Tarvin, Troy G. Murphy
Troy G Murphy
Status signals are linked to fighting ability and enable competitors to gain access to resources without risking injury in aggressive combat. The relationship between testosterone (T), a hormone that mediates aggression, and signals of status is well studied in males, but little is known about the relationship between T and female signals of status. Female and male American goldfinches Spinus tristis express a dynamic carotenoid-based orange bill color during the breeding season and previous work has demonstrated that females use orange bill color to communicate competitive ability during intrasexual competition. We test the hypothesis that female bill color reflects baseline …
Lack Of Melanized Keratin And Barbs That Fall Off: How The Racketed Tail Of The Turquoise-Browed Motmot Eumomota Superciliosa Is Formed, Troy G. Murphy
Lack Of Melanized Keratin And Barbs That Fall Off: How The Racketed Tail Of The Turquoise-Browed Motmot Eumomota Superciliosa Is Formed, Troy G. Murphy
Troy G Murphy
The racket-tipped tail of the motmots is uniquely shaped and its formation has attracted much attention. Barbs that grow along the wire of the motmot’s two central tail feathers are weakly attached and shed soon after development. The cause of the weak attachment of these barbs is unclear. I induced feather growth by plucking the central tail feathers from seven turquoise-browed motmots Eumomota superciliosa and then collected the regrown feathers before the barbs along the wire had fully shed. I compared the barb-rachis junction (petiole of the ramus) along the distal flag (the racket-tip of the tail) where barbs are …