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Use of anthropogenic material for extended ornamented phenotype in two fairy-wrens
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This observational study reported the first documented instances of two fairy-wren species (White-winged and Red-backed) using plastic pieces as substitutes for flower petals in petal displays used to attract mates. With increasing global plastic pollution, the authors noted that use of anthropogenic materials in extended phenotypic displays by birds and other animals will likely increase, emphasizing the importance of understanding population-level effects of such behavioral changes.
Abstract Birds often advertise their quality to potential mates through sexual displays that complement their colorful plumage. Some species use materials to enhance their attractiveness, such as the use of colorful fruits and anthropogenic materials in the display bowers across bowerbirds. Here we report the first observations of anthropogenic materials in sexual displays by two fairy-wren species. On two separate occasions and sites, we witnessed a White-winged and Red-backed male carrying a piece of plastic as a substitute for a flower petal during a petal display, which are used across Malurus to enhance reproductive fitness. Given increasing plastic pollution globally, the use of anthropogenic materials as part of extended phenotypes in birds and other animals will likely increase and it will be important to understand the effect this has on populations.
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Researchers examined the incorporation of anthropogenic nest materials, including plastic debris, by two distinct migratory bird populations in Europe, assessing how habitat transformation and plastic pollution affect nesting behavior. The study found that birds in both populations used plastic materials as nest components, with the prevalence and types of anthropogenic materials reflecting local availability and degree of habitat modification.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.