| evolutionary and ecological correlates of quiet flight in nightbirds, hawks, falcons, and owls. | two hypotheses have been proposed for the evolution of structures that reduce flight sounds in birds. according to the stealth hypothesis, flying quietly reduces the ability of other animals (e.g. prey) to detect the animal's approach from its flight sounds. this hypothesis predicts that animals hunting prey with acute hearing evolve silencing features. the self-masking hypothesis posits that reduced flight sounds permit the animal itself to hear better (such as the sounds of its prey, or its ow ... | 2020 | 32426839 |
| speciation in indo-pacific swiftlets (aves: apodidae): integrating molecular and phenotypic data for a new provisional taxonomy of the <i>collocalia</i> <i>esculenta</i> complex. | white-bellied swiftlets of the collocalia esculenta complex constitute a radiation of colony-breeding swifts distributed throughout the tropical indo-pacific region. resolution of their taxonomy is challenging due to their morphological uniformity. to analyze the evolutionary history of this complex, we combine new biometric measurements and results from plumage assessment of museum specimens with novel as well as previously published molecular data. together, this body of information constitute ... | 2017 | 28609999 |
| [analysis and discrimination of collocalia esculenta l. via ftir spectroscopy]. | collocalia esculenta l. is called yanwo in china. thirty kinds of dry yanwo were identified by fourier transform infrared spectroscopy (ftir) . the results indicated that there were some obvious differences in ftir between the dry yanwo and the natural yanwo, mainly represented in some absorption peaks of protein, amino acid (1 634, 1 535 cm(-1)) and amylase (1 034 cm9-1)). meanwhile, the shape, position and intensity of the peaks from methylene (2 935 cm(-1)), protein and amino acid (1 647, 1 5 ... | 2006 | 17020031 |