Ophthalmology of Accipitrimorphae, Strigidae, and Falconidae: Hawks, Eagles, Vultures, Owls, Falcons, and Relatives

Moore, Bret A.; Montiani‐Ferreira, Fabiano

doi:10.1007/978-3-030-71302-7_20

Cited by 3 publications

(2 citation statements)

References 323 publications

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“…Additionally, studies in most species support that the corneal periphery is thicker than the central cornea (Bergmanson, 2019, 2021; Collin & Collin, 2021; Coyo et al., 2015; Downie et al., 2021; Jones et al., 2007; Pinto et al., 2016). In most other avian species, considerably higher values can be seen than in the Common pauraque cornea (Chard & Gundlach, 1938; Collin & Collin, 2021; Gonçalves et al., 2016; Gonzalez‐Alonso‐Alegre et al., 2015; Liu et al., 2016; Montiani‐Ferreira et al., 2004; Moore & Montiani‐Ferreira, 2022; Moraes, 2018; Murphy & Dubielzig, 1993; Sokolenko et al., 2021; Werther et al., 2017) (Table 1). Species smaller than the Common pauraque have been shown to have thinner corneas, such as in the Anna's and Black‐Chinned Hummingbirds (Moore et al., 2019), and in the Japanese Quail (Mayakkannan et al., 2018) (Table 1).…”

Section: Discussionmentioning

confidence: 99%

Evaluation of the common pauraque (Nyctidromus albicollis) cornea using light and scanning electron microscopy

Tozetti,

de Lima Sousa Araújo,

Moreira

et al. 2023

Anat Histol Embryol

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The common pauraque Nyctidromus albicollis (Gmelin, 1789) is a widespread avian species; however due to its nocturnal habits and reclusive behaviour, little is known about their vision and ecology. Most avian species are visually dependent with advanced visual systems providing high spatial resolution, on the species needs. Each ocular structure has a specific role in contributing towards high visual function, and the cornea is the first refractive structure in the visual process. However, the common pauraque cornea had not been described until the present data. Therefore, this study aims to describe the morphology and morphometry of the common pauraque cornea by means of light and scanning electron microscopy to evaluate the cross‐sectional anatomy as well as the ultrastructure of the endothelial cells. Histological similarities with the cornea of other birds have been observed, but the thickness of the common pauraque cornea is much smaller than the other described corneas. A better understanding of the common pauraque cornea can help us better explain the physiology of vision and the visual requirements of this species. In turn, this will help us better understand how this species successfully interacts with its environment, and will improve our knowledge on how to interpret pathological changes in their cornea in a clinical setting.

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Section: Discussionmentioning

confidence: 99%

Evaluation of the common pauraque (Nyctidromus albicollis) cornea using light and scanning electron microscopy

Tozetti,

de Lima Sousa Araújo,

Moreira

et al. 2023

Anat Histol Embryol

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“…The reductions in visual contrast conferred by dark plumage occur above the visual discrimination threshold assumed for most birds [52]. Furthermore, both chromatic and achromatic contrast are important for diurnal raptor foraging [73], indicating that the dark dorsal plumage of island birds reduces their conspicuousness to predators ( [74]; but see [75]). The relationship between plumage phenotype and camouflage was less clear under mainland environmental conditions (i.e.…”

Section: Discussionmentioning

confidence: 99%

Adaptive and non-adaptive convergent evolution in feather reflectance of California Channel Islands songbirds

Porter,

Romero,

Adams

et al. 2023

Proc. R. Soc. B.

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Convergent evolution is widely regarded as a signature of adaptation. However, testing the adaptive consequences of convergent phenotypes is challenging, making it difficult to exclude non-adaptive explanations for convergence. Here, we combined feather reflectance spectra and phenotypic trajectory analyses with visual and thermoregulatory modelling to test the adaptive significance of dark plumage in songbirds of the California Channel Islands. By evolving dark dorsal plumage, island birds are generally less conspicuous to visual-hunting raptors in the island environment than mainland birds. Dark dorsal plumage also reduces the energetic demands associated with maintaining homeothermy in the cool island climate. We also found an unexpected pattern of convergence, wherein the most divergent island populations evolved greater reflectance of near-infrared radiation. However, our heat flux models indicate that elevated near-infrared reflectance is not adaptive. Analysis of feather microstructure suggests that mainland-island differences are related to coloration of feather barbs and barbules rather than their structure. Our results indicate that adaptive and non-adaptive mechanisms interact to drive plumage evolution in this system. This study sheds light on the mechanisms driving the association between dark colour and wet, cold environments across the tree of life, especially in island birds.

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The visual fields of the Harpy Eagle (Harpia harpyja)

et al. 2023

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Ophthalmology of Accipitrimorphae, Strigidae, and Falconidae: Hawks, Eagles, Vultures, Owls, Falcons, and Relatives

Cited by 3 publications

References 323 publications

Evaluation of the common pauraque (Nyctidromus albicollis) cornea using light and scanning electron microscopy

Evaluation of the common pauraque (Nyctidromus albicollis) cornea using light and scanning electron microscopy

Adaptive and non-adaptive convergent evolution in feather reflectance of California Channel Islands songbirds

The visual fields of the Harpy Eagle (Harpia harpyja)

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