Search Results - "Delhey, Kaspar"

Ornaments are equally informative in male and female birds by Nolazco, Sergio, Delhey, Kaspar, Nakagawa, Shinichi, Peters, Anne

“…Female ornaments are often reduced, male-like traits. Although these were long perceived as non-functional, it is now broadly accepted that female ornaments…”
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Darker eggs feel the heat by Delhey, Kaspar

“…Comparative analyses of egg colouration and experimental data suggest that variation in egg colours between species is shaped by thermoregulatory needs…”
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Variability, heritability and condition-dependence of the multidimensional male colour phenotype in a passerine bird by Fan, Marie, Hall, Michelle L, Roast, Michael, Peters, Anne, Delhey, Kaspar

“…Elaborate ornamental traits are commonly assumed to be honest signals of individual quality, owing to the presumed costs involved in their production and/or…”
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Conspicuous plumage colours are highly variable by Delhey, Kaspar, Szecsenyi, Beatrice, Nakagawa, Shinichi, Peters, Anne

“…Elaborate ornamental traits are often under directional selection for greater elaboration, which in theory should deplete underlying genetic variation. Despite…”
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Bright birds are cautious: seasonally conspicuous plumage prompts risk avoidance by male superb fairy-wrens by McQueen, Alexandra, Naimo, Annalise C., Teunissen, Niki, Magrath, Robert D., Delhey, Kaspar, Peters, Anne

“…Increased predation risk is considered a cost of having conspicuous colours, affecting the anti-predator behaviour of colourful animals. However, this is…”
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Is color data from citizen science photographs reliable for biodiversity research? by Laitly, Alexandra, Callaghan, Corey T., Delhey, Kaspar, Cornwell, William K.

“…Color research continuously demands better methods and larger sample sizes. Citizen science (CS) projects are producing an ever‐growing geo‐ and…”
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Seasonal changes in colour: a comparison of structural, melanin- and carotenoid-based plumage colours by Delhey, Kaspar, Burger, Claudia, Fiedler, Wolfgang, Peters, Anne

“…Plumage coloration is important for bird communication, most notably in sexual signalling. Colour is often considered a good quality indicator, and the…”
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Quantifying variability of avian colours: are signalling traits more variable? by Delhey, Kaspar, Peters, Anne

“…Increased variability in sexually selected ornaments, a key assumption of evolutionary theory, is thought to be maintained through condition-dependence…”
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A review of Gloger's rule, an ecogeographical rule of colour: definitions, interpretations and evidence by Delhey, Kaspar

“…ABSTRACT Gloger's rule is an ecogeographical rule that links animal colouration with climatic variation. This rule is named after C.W.L. Gloger who was one of…”
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The evolution of mimicry of friarbirds by orioles (Aves: Passeriformes) in Australo-Pacific archipelagos by Jønsson, Knud Andreas, Delhey, Kaspar, Sangster, George, Ericson, Per G. P., Irestedt, Martin

“…Observations by Alfred Wallace and Jared Diamond of plumage similarities between co-occurring orioles (Oriolus) and friarbirds (Philemon) in the Malay…”
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What drives our aesthetic attraction to birds? by Santangeli, Andrea, Haukka, Anna, Morris, William, Arkkila, Sarella, Delhey, Kaspar, Kempenaers, Bart, Valcu, Mihai, Dale, James, Lehikoinen, Aleksi, Mammola, Stefano

“…In the Anthropocene, the era when the imprint of humans on nature is pervasive across the planet, it is of utmost importance to understand human relationships…”
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Gloger’s rule by Delhey, Kaspar

“…Delhey introduces the relationship between climatic parameters like humidity or temperature and animal coloration…”
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The effect of skin reflectance on thermal traits in a small heliothermic ectotherm by Matthews, Genevieve, Goulet, Celine T., Delhey, Kaspar, Chapple, David G.

“…Variation in colour patterning is prevalent among and within species. A number of theories have been proposed in explaining its evolution. Because solar…”
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Paternity analysis reveals opposing selection pressures on crown coloration in the blue tit (Parus caeruleus) by Delhey, Kaspar, Johnsen, Arild, Peters, Anne, Andersson, Staffan, Kempenaers, Bart

“…Parus caeruleus…”
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Male sexual attractiveness and parental effort in blue tits: a test of the differential allocation hypothesis by Johnsen, Arild, Delhey, Kaspar, Schlicht, Emmi, Peters, Anne, Kempenaers, Bart

“…When the reproductive value of a breeding attempt is related to attributes of the breeding partner, an individual is expected to allocate more resources to…”
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The colour of an avifauna: A quantitative analysis of the colour of Australian birds by Delhey, Kaspar

“…Animal coloration is a poorly-understood aspect of phenotypic variability. Here I expand initial studies of the colour gamut of birds by providing the first…”
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Nest webs beyond woodpeckers: the ecological role of other nest builders by Delhey, Kaspar

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Conservation implications of anthropogenic impacts on visual communication and camouflage by Delhey, Kaspar, Peters, Anne

“…Anthropogenic environmental impacts can disrupt the sensory environment of animals and affect important processes from mate choice to predator avoidance…”
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The carotenoid-continuum: carotenoid-based plumage ranges from conspicuous to cryptic and back again by Delhey, Kaspar, Roberts, Mark L, Peters, Anne

“…Carotenoids are frequently used by birds to colour their plumage with green, yellow, orange or red hues, and carotenoid-based colours are considered honest…”
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Rejection of brood‐parasitic shiny cowbird Molothrus bonariensis nestlings by the firewood‐gatherer Anumbius annumbi? by Delhey, Kaspar, Carrizo, Martín, Verniere, Lucas, Mahler, Bettina, Peters, Anne

“…Costs imposed by brood parasitic birds exert strong selection on their hosts to avoid parasitism. While egg rejection is a common defence, nestling rejection…”
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