Xu, Xing (2006). "Feathered dinosaurs from China and the evolution of major avian characters". Integrative Zoology. 1 (1): 4–11. doi: 10.1111/j.1749-4877.2006.00004.x. PMID 21395983. S2CID 1516713. The feather is a recurring motif in many cultures around the world including Native American tribes like the Hopi who believe that feathers represent their link between heaven and earth; for some Pacific Islanders, they represent rainbows connecting the sky-world with our Earth-world; while others attribute them as symbols of love, peace or hope. However, if white feathers appeared while dreaming then perhaps this is a sign from the universe encouraging someone who needs help; maybe they don’t feel like their prayers are getting heard or felt alone even though they know others love them.

Feather File Format — Apache Arrow v13.0.0 Feather File Format — Apache Arrow v13.0.0

Several genes have been found to determine feather development. They will be key to understand the evolution of feathers. For instance, some genes convert scales into feathers or feather-like structures when expressed or induced in bird feet, such as the scale-feather converters Sox2, Zic1, Grem1, Spry2, and Sox18. [80] Since the 1990s, dozens of feathered dinosaurs have been discovered in the clade Maniraptora, which includes the clade Avialae and the recent common ancestors of birds, Oviraptorosauria and Deinonychosauria. In 1998, the discovery of a feathered oviraptorosaurian, Caudipteryx zoui, challenged the notion of feathers as a structure exclusive to Avialae. [99] Buried in the Yixian Formation in Liaoning, China, C. zoui lived during the Early Cretaceous Period. Present on the forelimbs and tails, their integumentary structure has been accepted [ by whom?] as pennaceous vaned feathers based on the rachis and herringbone pattern of the barbs. In the clade Deinonychosauria, the continued divergence of feathers is also apparent in the families Troodontidae and Dromaeosauridae. Branched feathers with rachis, barbs, and barbules were discovered in many members including Sinornithosaurus millenii, a dromaeosaurid found in the Yixian formation (124.6 MYA). [100]

Niko Tinbergen, a 1973 Nobel Prize winner for his work to understand animal behavior, developed what he called the four levels of analysis that biologists have been using ever since to structure their research. For us to fully understand anything in nature, he said, we need to think about these four questions:

Feather - Wikipedia

Ribak, G.; Weihs, D.; Arad, Z. (2005). "Water retention in the plumage of diving great cormorants Phalacrocorax carbo sinensis". J. Avian Biol. 36 (2): 89–95. doi: 10.1111/j.0908-8857.2005.03499.x. Bonser, R.; Saker, L.; Jeronimidis, G. (2004). "Toughness anisotropy in feather keratin". Journal of Materials Science. 39 (8): 2895–2896. Bibcode: 2004JMatS..39.2895B. doi: 10.1023/B:JMSC.0000021474.75864.ff. S2CID 135873731. A blue feather can be seen as an indication that someone you love is thinking about you or even the color of your soul! Understanding what finding a blue feather means will help you find out what significance this finding holds for your life. Read more about it: blue feather meaning. Brown feathersJohnston, Nicole & Parsons, Jean (20 September 2018). "Feathers: Endangered – Fauna and Fashion". University of Missouri's Historic Costume and Textiles Collection.

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Burtt, Edward H. Jr.; Ichida, Jann M. (2004). "Gloger's Rule, feather-degrading bacteria, and color variation among Song Sparrows" (PDF). Condor. 106 (3): 681–686. doi: 10.1650/7383. S2CID 5857742. Archived (PDF) from the original on 20 November 2012. Gray feathers symbolize wisdom & knowledge which might be why they show up when people need direction in their lives or someone to guide them through difficult times; this color also represents neutrality because it doesn’t signify any one specific thing even though gray is considered a negative color representing apathy.Xu, X.; H. H. Zhou & R. O. Prum (2001). "Branched integumental structures in Sinornithosaurus and the origin of feathers". Nature. 410 (6825): 200–204. Bibcode: 2001Natur.410..200X. doi: 10.1038/35065589. PMID 11242078. S2CID 4426803.

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a b St. Fleur, Nicholas (8 December 2016). "That Thing With Feathers Trapped in Amber? It Was a Dinosaur Tail". The New York Times. Archived from the original on 8 December 2016 . Retrieved 8 December 2016. Vinther, Jakob; Briggs, Derek E. G.; Clarke, Julia; Mayr, Gerald; Prum, Richard O. (2009). "Structural coloration in a fossil feather" (PDF). Biology Letters. 6 (1): 128–31. doi: 10.1098/rsbl.2009.0524. PMC 2817243. PMID 19710052. Archived from the original (PDF) on 21 June 2010 . Retrieved 19 July 2010.a b Delhey, K; Peters, A.; Kempenaers, B. (2007). "Cosmetic coloration in birds: occurrence, function and evolution" (PDF). Am. Nat. 169: S145–158. doi: 10.1086/510095. PMID 19426089. S2CID 29592388. Archived from the original (PDF) on 3 December 2007. In some cases, however, feather symbolism for Christianity may involve something more sinister like vultures because these birds show up after times of death and destruction which means they could be used by both good and evil spirits throughout history depending on how people choose to interpret them! Dinosaur feathers found in Alberta amber". CBC News. 15 September 2011. Archived from the original on 15 September 2011. Shawkey, M. D.; Pillai, S. R.; Hill, G. E. (2003). "Chemical warfare? Effects of uropygial oil on feather-degrading bacteria" (PDF). Journal of Avian Biology. 34 (4): 345–349. doi: 10.1111/j.0908-8857.2003.03193.x. Archived from the original (PDF) on 10 September 2008.