Stages of Plumage Maturation of the Tawny-bellied Seedeater: Evidence of Delayed Plumage Maturation and Cryptic Differentiation between Juveniles and Females

Facchinetti, Carolina; Mahler, Bettina; Giácomo, Alejandro G. Di; Reboreda, Juan C.

doi:10.1525/cond.2011.110010

Cited by 9 publications

(20 citation statements)

References 35 publications

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“…These observations on plumage maturation of S. ruficollis agree with recent studies made with the species S. hypoxantha under laboratory conditions that were measured objectively using reflectance spectrometry (Facchinetti et al 2011). Such study found that males have a plumage similar to females during their first year (delayed plumage maturation).…”

Section: Remarkssupporting

confidence: 90%

“…IS A Neotropical genus of ca 30 species of small (8-10 g) seedeaters of forests, grasslands and wetlands from southern United States to southern South America (Ridgely and Tudor 1989). In recent years a group of smaller species of Sporophila known as capuchinos, that inhabit southern South America grasslands, have attracted increasing interest by researchers who have studied their plumage, vocalizations, breeding ecology, systematic and evolution (Lijtmaer et al 2004, Facchinetti et al 2008, 2011, Areta 2008, 2009, Areta et al 2011, Benites et al 2010, Machado and Silveira 2011, Campagna et al 2009, 2012, Areta and Repenning 2011a, 2011b, Repenning et al 2010). In spite of diverse plumages, vocalizations, and habitat uses of the species of this group some studies indicate that they are genetically very similar (Lijtmaer et al 2004, Campagna et al 2009, 2012).…”

Section: Resumen-mentioning

confidence: 99%

“…Males acquire typical plumage of an adult after a year of age, being the crown the latest patch acquiring gray coloration. Further studies of the plumage of S. hypoxantha indicate that the pigments involved in reddish and dark coloration are melanins (transmission electron microscopy, Facchinetti 2012), while the olive or gray coloration of the crown and dorsal parts would correspond to structural (not pigment) and whose function is often associated with signals of male competitiveness or social dominance (see Facchinetti et al 2011).…”

Section: Remarksmentioning

confidence: 99%

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A New Species of Seedeater (Emberizidae:Sporophila) from the Iberá Grasslands, in Northeast Argentina

Giacomo

Lanús²,

Kopuchian

2016

Preprint

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We describe a new species of capuchino of the genus Sporophila 1 (Emberizidae) of the Esteros del Iberá, province of Corrientes, in northeastern Argentina. 2 This species would have remained unidentified due to lack of ornithological explorations in 3 the central area of the Esteros del Iberá. It has been confused with immature individuals of 4 other Sporophila species. We made observations of behavior and habitat, playback 5 experiments, comparative analyzes of the vocalizations and plumage with other sympatric 6 species of the same genus, and we found this species, which we have named Sporophila 7 iberaensis, inhabiting wet grasslands from the edges of the marshes, having a unique vocal 8 repertoire and a unique plumage. Because of its restricted geographical distribution and the 9 threats that have their habitat, this new species should be categorized as Vulnerable on the 10 IUCN Red List. 11 Sporophila, vocalizations 13 14 RESUMEN.-Describimos una nueva especie de capuchino del género Sporophila 15 (Emberizidae) de los Esteros del Iberá, provincia de Corrientes, en el noreste de Argentina. 16 Esta especie habría permanecido sin identificar debido a la falta de exploraciones 17 ornitológicas en la región central de los Esteros del Iberá y además habría sido confundida 18 con individuos inmaduros de otras especies de Sporophila. Realizamos observaciones de 19 comportamiento y hábitat, experimentos de playback, análisis comparativos de las 20 vocalizaciones y comparaciones del plumaje con otras especies simpátricas del mismo 21 género encontrando que esta especie, a la que nombramos como Sporophila iberaensis, 22 habita pastizales húmedos de los bordes de los esteros, presentando un repertorio vocal y un 1 plumaje únicos. Debido a su distribución restringida y las amenazas que tiene su hábitat, 2 esta nueva especie debe ser categorizada como Vulnerable en la lista roja de la IUCN. 3 4 SPOROPHILA IS A Neotropical genus of ca 30 species of small (8-10 g) seedeaters of 1

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Section: Remarkssupporting

confidence: 90%

Section: Resumen-mentioning

confidence: 99%

Section: Remarksmentioning

confidence: 99%

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A New Species of Seedeater (Emberizidae:Sporophila) from the Iberá Grasslands, in Northeast Argentina

Giacomo

Lanús²,

Kopuchian

2016

Preprint

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“…Therefore, it is important to test the distinctiveness of avian plumage coloration in avian tetrachromatic visual models (Burns & Shultz, ; Eaton, ). To our knowledge, only one previous study on DPM has adopted an avian visual system to assess differences in color between sex and age classes (Facchinetti, Mahler, Giacomo, & Reboreda, ). Tawny‐bellied seedeater ( Sporophila hypoxantha ) is able to detect differences in plumage color between ASY and SY males, as well as differences between SY males and females with the avian visual system, although SY males look like females to the human eye (Facchinetti et al, ).…”

Section: Introductionmentioning

confidence: 99%

“…To our knowledge, only one previous study on DPM has adopted an avian visual system to assess differences in color between sex and age classes (Facchinetti, Mahler, Giacomo, & Reboreda, ). Tawny‐bellied seedeater ( Sporophila hypoxantha ) is able to detect differences in plumage color between ASY and SY males, as well as differences between SY males and females with the avian visual system, although SY males look like females to the human eye (Facchinetti et al, ). As avian visual system was not used in testing DPM hypotheses in the tawny‐bellied seedeater study, there is a general lack of combination of avian visual and behavioral evidences to test the FMH, and our work would help fill in this gap.…”

Section: Introductionmentioning

confidence: 99%

Delayed plumage maturation in green‐backed flycatchers (Ficedula elisae): An evidence of female mimicry

et al. 2018

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Delayed plumage maturation (DPM) is the delayed acquisition of an adult color and pattern of plumage until after the first potential breeding period. Among the hypotheses proposed to explain DPM, the female mimicry hypothesis (FMH) has received considerable attention. FMH predicts that after‐second‐calendar‐year (ASY) males should attack ASY males more than second‐calendar‐year (SY) males and females, while no difference between the two latter. Few studies have been thought as support for FMH, while in fact most of them give no conclusive evidence to the assumption of FMH that ASY males are unable to distinguish SY males from females. Thus, other support besides behavioral experiments, such as it is physiologically impossible to discriminate SY males and females from avian perspective, is important in testing FMH. We studied color differences in six plumage patches between ASY male, SY male and female by analyzing reflectance spectra in the avian visual system, and tested the prediction of FMH by conducting intrusion experiments on territorial males with three kinds of conspecifics (i.e., ASY males, SY males and females) as territory “intruders” in the green‐backed flycatcher (Ficedula elisae). It is physiologically impossible for ASY males to distinguish SY males and females through the plumage color of crown, mantle, rump, and throat patches, moreover difficult to distinguish through breast and belly patches even under reasonable viewing conditions. ASY males were more aggressive toward ASY males than SY males and females with no differences between the two latter. SY males showed a slightly but not significantly higher attack intensity on ASY males than SY males and females. Our results suggest that female mimicry is more likely to be the explanation for DPM in the green‐backed flycatcher. To our knowledge, this is the first study combining avian visual system and behavioral experiments in testing hypotheses of DPM.

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Female tawny-bellied seedeaters do not prefer more colorful males in choice experiments

Facchinetti

Reboreda

2013

J Ethol

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Stages of Plumage Maturation of the Tawny-bellied Seedeater: Evidence of Delayed Plumage Maturation and Cryptic Differentiation between Juveniles and Females

Cited by 9 publications

References 35 publications

A New Species of Seedeater (Emberizidae:Sporophila) from the Iberá Grasslands, in Northeast Argentina

A New Species of Seedeater (Emberizidae:Sporophila) from the Iberá Grasslands, in Northeast Argentina

Delayed plumage maturation in green‐backed flycatchers (Ficedula elisae): An evidence of female mimicry

Female tawny-bellied seedeaters do not prefer more colorful males in choice experiments

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