Results 11 to 20 of about 246,696 (380)

The Epithelial Egg Tooth of the Chicken Shares Protein Markers with the Embryonic Subperiderm and Feathers [PDF]

Journal of Developmental Biology
The epithelial egg tooth is used by birds to open the eggshell for hatching. This ectodermal structure consists of a multilayered periderm and a hard cornified portion, the caruncle or actual egg tooth.
Attila Placido Sachslehner, Julia Steinbinder, Claudia Hess, Veronika Mlitz, Leopold Eckhart   +4 more
doaj   +2 more sources

How flight feathers stick together to form a continuous morphing wing

Science, 2020
Wing shapes take flight Birds can dynamically alter the shape of their wings during flight, although how this is accomplished is poorly understood. Matloff et al. found that two mechanisms control the movement of the individual feathers.
Laura Y. Matloff, Eric Chang, Teresa J. Feo, Lindsie Jeffries, Amanda K. Stowers, C. Thomson, D. Lentink   +6 more
semanticscholar   +1 more source

Feather versus non-feather bedding for asthma [PDF]

Cochrane Database of Systematic Reviews, 2000
Two recent epidemiological studies have reported that children using non-feather pillows suffered from more frequent episodes of wheeze than those using feather pillowsTo evaluate the efficacy of using feather bedding in the control of asthma symptoms.The Cochrane Airways Group asthma clinical trials register, derived from MEDLINE, EMBASE and hand ...
F, Campbell, K, Jones
openaire   +2 more sources

Reduced reflectance and altered color: The potential cost of external particulate matter accumulation on urban Rock Pigeon (Columba livia) feathers

Frontiers in Ecology and Evolution, 2023
Feather quality in birds is considered an honest signal of individual health as feather appearance and function depend on an individual’s ability to maintain them.
Jennifer L. Ellis, Alexandra G. Ponette-González, Alexandra G. Ponette-González, Matthew Fry, Matthew Fry, Jeff A. Johnson, Jeff A. Johnson   +6 more
doaj   +1 more source

Taphonomic analysis of the exceptional preservation of early bird feathers during the early Cretaceous period in Northeast China

Frontiers in Earth Science, 2023
Fossil soft tissues contain important and irreplaceable information on life evolution, and on the comprehensive understanding of the nature of Mesozoic ecosystems.
Yan Zhao, Qian Tian, Guang-Ying Ren, Ying Guo, Xiao-Ting Zheng, Xiao-Ting Zheng   +5 more
doaj   +1 more source

Structural absorption by barbule microstructures of super black bird of paradise feathers

Nature Communications, 2018
Many studies have shown how pigments and internal nanostructures generate color in nature. External surface structures can also influence appearance, such as by causing multiple scattering of light (structural absorption) to produce a velvety, super ...
D. E. McCoy, Teresa J. Feo, T. Harvey, R. Prum   +3 more
semanticscholar   +1 more source

Metal Levels in Blood of Three Species of Shorebirds during Stopover on Delaware Bay Reflect Levels in Their Food, Horseshoe Crab Eggs

Toxics, 2017
Understanding the relationship between metal level in predators and their prey is an important issue, and is usually difficult to determine because animals eat a variety of organisms.
Joanna Burger, Nellie Tsipoura, Michael Gochfeld   +2 more
doaj   +1 more source

Environmental effects on magnetic fluorescent powder development of fingermarks on bird of prey feathers [PDF]

, 2019
A comparison study of the effects of environmental conditions on the development of latent fingermarks on raptor feathers using green magnetic fluorescent powder was undertaken using both sebaceous loaded and natural fingermark deposits.
Farrugia, K. J., Gentles, D., Jones, Benjamin J., McMorris, H., Sturrock, K.   +4 more
core   +2 more sources

Registro de ácaros em avestruz no estado do Rio de Janeiro Report of mites in ostrich in Rio de Janeiro State

Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 2007
For the first time, it was identified a mite in a three-year-old male ostrich that had lost feathers and showed skin irritation. The animal belonged to a flock of 50 birds, located in Baixada Fluminense, in Rio de Janeiro State.
D.G. Mattos Jr, J.A. Amaral, M. Porto, L.P.L. Fedullo, L.M.C. Balthazar, P. Tucunduva   +5 more
doaj   +1 more source

Imaging Diagnostics Coupled with Non-Invasive and Micro-Invasive Analyses for the Restoration of Ethnographic Artifacts from French Polynesia

Heritage, 2022
In this paper, two different objects from the ethnographic collection of the museum of the Congregation of the Sacred Hearts of Jesus and Mary (Rome), a Polynesian barkcloth (tapa) and a Polynesian headdress in feathers (pa’e ku’a), were investigated to ...
Claudia Colantonio, Luca Lanteri, Alessandro Ciccola, Ilaria Serafini, Paolo Postorino, Erminia Censorii, Doinita Rotari, Claudia Pelosi   +7 more
doaj   +1 more source