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- W3100560500 abstract "Abstract Mutualisms between nectarivorous birds and the plants they pollinate are functionally diverse. Nectarivorous birds which hover while feeding (the majority of hummingbirds) tend to have straight bills, while those that perch while feeding (some hummingbirds and almost all passerine nectarivores) tend to have decurved bills. Sunbirds typically use their curved bills to feed in an arc from a perching position and we thus predicted that they would prefer, and feed most efficiently on, flowers that are curved towards a perching position. To test this, we examined the responses of sunbirds to model flowers differing in curvature (straight or curved), orientation (facing upwards or downwards), and availability of a top perch (present or absent). Birds did not show preferences among model flower types in terms of number of landings to feed or number of probes. In general they preferred to use perches above model flowers, particularly those that curved upwards, but they tended to perch below model flowers that curve downwards and in such cases also took the least time to insert their bills. These results are consistent with the idea that perching birds with curved beaks will feed most efficiently from flowers that are curved towards the perching position. We discuss the implications of these results for the evolution of floral architecture, including provision of perches." @default.
- W3100560500 created "2020-11-23" @default.
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- W3100560500 date "2020-11-12" @default.
- W3100560500 modified "2023-10-01" @default.
- W3100560500 title "Functional consequences of flower curvature, orientation and perch position for nectar feeding by sunbirds" @default.
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- W3100560500 doi "https://doi.org/10.1093/biolinnean/blaa154" @default.
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