Comparative study on nanostructured order–disorder in the wing eyespots of the giant owl butterfly,<i>Caligo memnon</i>

Sackey, J.; Berthier, Serge; Maaza, M.; Beuvier, Thomas; Gibaud, Alain

doi:10.1049/iet-nbt.2017.0320

Cited by 6 publications

(5 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These scales appear matte black, and are thus functionally tuned for anti‐reflectance. Other reports have studied the biophysics of light‐trapping by analogous scale structures, and converge in the finding that highly ordered structures are required for light manipulation . Our measurements of over 250 black scales recapitulate the finding that orderedness of scale ultrastructures, particularly crossrib width and spacing, is linked to light trapping in matte black scale types.…”

Section: Discussionsupporting

confidence: 83%

Sub‐micrometer insights into the cytoskeletal dynamics and ultrastructural diversity of butterfly wing scales

Day

Hanly

Ren

et al. 2019

Developmental Dynamics

View full text Add to dashboard Cite

Background The color patterns that adorn lepidopteran wings are ideal for studying cell type diversity using a phenomics approach. Color patterns are made of chitinous scales that are each the product of a single precursor cell, offering a 2D system where phenotypic diversity can be studied cell by cell, both within and between species. Those scales reveal complex ultrastructures in the sub‐micrometer range that are often connected to a photonic function, including iridescent blues and greens, highly reflective whites, or light‐trapping blacks. Results We found that during scale development, Fascin immunostainings reveal punctate distributions consistent with a role in the control of actin patterning. We quantified the cytoskeleton regularity as well as its relationship to chitin deposition sites, and confirmed a role in the patterning of the ultrastructures of the adults scales. Then, in an attempt to characterize the range and variation in lepidopteran scale ultrastructures, we devised a high‐throughput method to quickly derive multiple morphological measurements from fluorescence images and scanning electron micrographs. We imaged a multicolor eyespot element from the butterfly Vanessa cardui (V. cardui), taking approximately 200 000 individual measurements from 1161 scales. Principal component analyses revealed that scale structural features cluster by color type, and detected the divergence of non‐reflective scales characterized by tighter cross‐rib distances and increased orderedness. Conclusion We developed descriptive methods that advance the potential of butterfly wing scales as a model system for studying how a single cell type can differentiate into a multifaceted spectrum of complex morphologies. Our data suggest that specific color scales undergo a tight regulation of their ultrastructures, and that this involves cytoskeletal dynamics during scale growth.

show abstract

Section: Discussionsupporting

confidence: 83%

Sub‐micrometer insights into the cytoskeletal dynamics and ultrastructural diversity of butterfly wing scales

Day

Hanly

Ren

et al. 2019

Developmental Dynamics

View full text Add to dashboard Cite

show abstract

“…From the Euler angles α ( t ), θ ( t ), and φ ( t ), flapping kinematic data can be obtained at any time. Fourier series combined with different coefficients can be used to describe any arbitrary curve [ 36 , 37 ], so the fitted curves of the three flapping angles can be described via the Fourier series. Figure 2 D shows the Euler angles of the hindwings during the beetle’s flapping flight.…”

Section: Resultsmentioning

confidence: 99%

Investigating the Mechanical Performance of Bionic Wings Based on the Flapping Kinematics of Beetle Hindwings

Liu,

Shen,

Shen

et al. 2024

Biomimetics

View full text Add to dashboard Cite

The beetle, of the order Coleoptera, possesses outstanding flight capabilities. After completing flight, they can fold their hindwings under the elytra and swiftly unfold them again when they take off. This sophisticated hindwing structure is a result of biological evolution, showcasing the strong environmental adaptability of this species. The beetle’s hindwings can provide biomimetic inspiration for the design of flapping-wing micro air vehicles (FWMAVs). In this study, the Asian ladybird (Harmonia axyridis Pallas) was chosen as the bionic research object. Various kinematic parameters of its flapping flight were analyzed, including the flight characteristics of the hindwings, wing tip motion trajectories, and aerodynamic characteristics. Based on these results, a flapping kinematic model of the Asian ladybird was established. Then, three bionic deployable wing models were designed and their structural mechanical properties were analyzed. The results show that the structure of wing vein bars determined the mechanical properties of the bionic wing. This study can provide a theoretical basis and technical reference for further bionic wing design.

show abstract

“…The fitted curves can directly reflect the function of the wing‐flapping angles, which is also useful for inputting related functions in subsequent CFD analysis. Considering Fourier series combined with different coefficients can be used to describe an arbitrary curve [24]; here, the first four Fourier terms were chosen to describe the flapping‐wing motion of the hind wing accurately. The definition of position angle, elevation angle and rotation angle are given below:

F ()(, t) = \sum_{n = 0}^{4} [a_{n} \cos (n K t) + b_{n} \sin (n K t)]

K = \frac{2 π f c}{2 U}

U = 2 θ R f

where n represents an integer changing from 0 to 4; t represents time; K represents the reduced frequency, which is 0.37; a n and b n represent the constant coefficients of the Fourier terms; f represents flapping‐wing frequency and is 68.7 Hz; c is the mean hind wing chord length, which is 11.677 mm; U is calculated to be 6.91 m/s, which represents the reference velocity at the wing tip; R is the length of the hind wing, which is measured to be 45.27 mm; θ is the wing beat amplitude and is about 70°.…”

Section: Resultsmentioning

confidence: 99%

“…The fitted curves can directly reflect the function of the wing-flapping angles, which is also useful for inputting related functions in subsequent CFD analysis. Considering Fourier series combined with different coefficients can be used to describe an arbitrary curve [24]; here, the first four Fourier terms were chosen to describe the flappingwing motion of the hind wing accurately. The definition of position angle, elevation angle and rotation angle are given below:…”

Section: Kinematic Modellingmentioning

confidence: 99%

Wing‐kinematics measurement and flight modelling of the bamboo weevilC. buqueti

Guo

2019

IET nanobiotechnol.

View full text Add to dashboard Cite

Insects are one of the most agile flyers in nature, and studying the kinematics of their wings can provide important data for the design of insect-like wing-flapping micro aerial vehicles. This study integrates high-speed photogrammetry and three-dimensional (3D) force measurement system to explore the kinematics of Cyrtotrachelus buqueti during the wing-flapping flight. The tracking point at the wing tip of the hind wing was recorded using high-speed videography. The lift-thrust force characteristic of wing-flapping motion was obtained by the 3D force sensor. Quantitative measurements of wing kinematics show that the wing-flapping pattern of the hind wing of C. buqueti was revealed as a double figure-eight trajectory. The kinematic modelling of the wing-flapping pattern was then established by converting the flapping motion into rotational motion about the pivoting wing base in the reference coordinate system. Moreover, the lift force generated by C. buqueti during the wing-flapping flight is sufficient to support its body weight without the need to use thrust force to compensate for the lack of lift force.

show abstract

Comparative study on nanostructured order–disorder in the wing eyespots of the giant owl butterfly,Caligo memnon

Cited by 6 publications

References 26 publications

Sub‐micrometer insights into the cytoskeletal dynamics and ultrastructural diversity of butterfly wing scales

Sub‐micrometer insights into the cytoskeletal dynamics and ultrastructural diversity of butterfly wing scales

Investigating the Mechanical Performance of Bionic Wings Based on the Flapping Kinematics of Beetle Hindwings

Wing‐kinematics measurement and flight modelling of the bamboo weevilC. buqueti

Contact Info

Product

Resources

About