A monograph of the Trochilidae, or family of humming-birds. Supplement

Gould, John; Hart, William M.; Phipps, John H. H.; Salomons, David; Sharpe, Richard Bowdler; Walter, T.

doi:10.5962/bhl.title.51215

Cited by 3 publications

(2 citation statements)

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“…The species diverge ecologically as well, with the hybrid individual being found both in an intermediate geographical locality ( a ) and intermediate environmental regime ( b ). Images modified from [81]. …”

Section: Resultsmentioning

confidence: 99%

Interspecific hybridization explains rapid gorget colour divergence inHeliodoxahummingbirds (Aves: Trochilidae)

et al. 2023

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Hybridization is a known source of morphological, functional and communicative signal novelty in many organisms. Although diverse mechanisms of established novel ornamentation have been identified in natural populations, we lack an understanding of hybridization effects across levels of biological scales and upon phylogenies. Hummingbirds display diverse structural colours resulting from coherent light scattering by feather nanostructures. Given the complex relationship between feather nanostructures and the colours they produce, intermediate coloration does not necessarily imply intermediate nanostructures. Here, we characterize nanostructural, ecological and genetic inputs in a distinctive Heliodoxa hummingbird from the foothills of eastern Peru. Genetically, this individual is closely allied with Heliodoxa branickii and Heliodoxa gularis , but it is not identical to either when nuclear data are assessed. Elevated interspecific heterozygosity further suggests it is a hybrid backcross to H. branickii . Electron microscopy and spectrophotometry of this unique individual reveal key nanostructural differences underlying its distinct gorget colour, confirmed by optical modelling. Phylogenetic comparative analysis suggests that the observed gorget coloration divergence from both parentals to this individual would take 6.6–10 My to evolve at the current rate within a single hummingbird lineage. These results emphasize the mosaic nature of hybridization and suggest that hybridization may contribute to the structural colour diversity found across hummingbirds.

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Section: Resultsmentioning

confidence: 99%

Interspecific hybridization explains rapid gorget colour divergence inHeliodoxahummingbirds (Aves: Trochilidae)

et al. 2023

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“…One of the structures most affected by selective processes in birds is the bill, which is directly involved with essential functions such as the acquisition of food, territory or nest defence, vocalization and mate (sexual) selection (Warham, ; van Oordt, Torres‐Mura & Hertel, ). In terms of ecological functions, the bill has been linked mainly with foraging preferences and feeding efficiency (Gould, ; Darwin, ). Therefore, the morphology, and particularly the shape of the bill, can affect niche differentiation both among species and between sexes (Feinsinger & Colwell, ; Berns & Adams, ).…”

Section: Introductionmentioning

confidence: 99%

Geometric morphometrics reveal interspecific and sexual differences in bill morphology in four sympatric planktivorous petrels

et al. 2018

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Variation in morphological structures may indicate the existence of ecological differences between species or sexes. In birds, the bill is one of the structures most affected by selection pressures because it is directly involved with several biological functions, particularly the acquisition of food. In this study, we combined geometric morphometrics and comparisons of linear measurements to assess the presence of sexual dimorphism and differences in bill shape and size of four species of abundant zooplanktivorous seabirds that coexist during their breeding season in Southern Ocean ecosystems [blue petrel (Halobaena caerulea), Antarctic prion (Pachyptila desolata), common diving petrel (Pelecanoides urinatrix) and South Georgia diving petrel (P. georgicus)]. The results showed that bills of Antarctic prion and blue petrel differed noticeably in size and shape from those of the two diving petrels, whereas those of common diving and South Georgian diving petrels overlapped in bill shape. These differences may be due to diet segregation or factors such as diving strategy, vocalizations or olfactory development. In addition, there was sexual dimorphism in bill shape or size in all four species. However, we could not directly attribute these differences to selection pressures because of the lack of studies comparing feeding ecology between sexes in these seabirds. These results reveal relationships between the bill shape and key factors of the ecology of these species, and demonstrate the usefulness of geometric morphometrics for detecting interspecific and sexual differences in species of otherwise sexually monomorphic petrels.

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A Distributional Survey of the Birds of Honduras

Monroe¹

1968

Ornithological Monographs

110

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A monograph of the Trochilidae, or family of humming-birds. Supplement

Cited by 3 publications

References 0 publications

Interspecific hybridization explains rapid gorget colour divergence inHeliodoxahummingbirds (Aves: Trochilidae)

Interspecific hybridization explains rapid gorget colour divergence inHeliodoxahummingbirds (Aves: Trochilidae)

Geometric morphometrics reveal interspecific and sexual differences in bill morphology in four sympatric planktivorous petrels

A Distributional Survey of the Birds of Honduras

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