The majority of dinosaurs known to have had feathers or protofeathers are theropods, however featherlike "filamentous integumentary structures" are also known from the ornithischian dinosaurs Tianyulong and Psittacosaurus. [89] The exact nature of these structures is still under study. However, it is believed that the stage-1 feathers (see Evolutionary stages section below) such as those seen in these two ornithischians likely functioned in display. [90] In 2014, the ornithischian Kulindadromeus was reported as having structures resembling stage-3 feathers. [91] The likelihood of scales evolving on early dinosaur ancestors are high. However, this was by assuming that primitive pterosaurs were scaly. [92] [93] A 2016 study analyzes the pulp morphology of the tail bristles of Psittacosaurus and finds they are similar to feathers but notes that they are also similar to the bristles on the head of the Congo peafowl, the beard of the turkey, and the spine on the head of the horned screamer. [94] A reestimation of maximum likelihoods by paleontologist Thomas Holtz finds that filaments were more likely to be the ancestral state of dinosaurs. [95] The feather symbol’s meaning varies depending on its color, curliness, placement, and the culture looking at it. It can also mean different things to you depending on your culture, and where you are in life spiritually and emotionally. Some even say a person who has a close link to their psychic powers can basically feel the angelic message simply by touching a feather (there’s a saying: “ feathers appear when angels are near“). Some Christian art also shows feathers as a symbol of John the Baptist or sometimes even God himself so they could represent humility since he was known as someone who had no earthly father which made him more like those born out of divine means than anyone else during his lifetime. D'Alba, Liliana (2019). "Pterosaur plumage". Nature Ecology & Evolution. 3 (1): 12–13. doi: 10.1038/s41559-018-0767-0. ISSN 2397-334X. PMID 30568284. S2CID 56480834. Barrett, Paul M.; Evans, David C.; Campione, Nicolás E. (30 June 2015). "Evolution of dinosaur epidermal structures". Biology Letters. 11 (6): 20150229. doi: 10.1098/rsbl.2015.0229. PMC 4528472. PMID 26041865.

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Mayr, Gerald; Pittman, Michael; Saitta, Evan; Kaye, Thomas G.; Vinther, Jakob (30 August 2016). Benson, Roger (ed.). "Structure and homology of Psittacosaurus tail bristles". Palaeontology. 59 (6): 793–802. Bibcode: 2016Palgy..59..793M. doi: 10.1111/pala.12257. hdl: 1983/029c668f-08b9-45f6-a0c5-30ce9256e593. S2CID 89156313. Finding feathers on the ground is a common thing. Also, when you notice a feather show up in your life, both make you wonder what it could mean. Maybe the feather helped breathe new life into you during hard times and you didn’t understand why? You always wondered about native people wearing feathers, painting them on walls, or respecting them entirely organically & naturally; maybe this is because of something to do with their meaning? The next paragraphs will try to shine some light on the feather color meaning. White feather If nothing else, bird feathers can be a reminder that it’s important not to get too caught up in the daily grind of life because birds remind us that we’re free from what binds other animals’ bodies which is why they have been seen as an omen for death and creativity by many cultures throughout time. Let us learn about the different meanings and symbolism of feathers and what they represent spiritually. It may help you make decisions, change your life path, or even look within yourself to find answers. In 2010, a carcharodontosaurid named Concavenator corcovatus was found to have remiges on the ulna suggesting it might have had quill-like structures on the ams. [96] However, Foth et al. 2014 disagress with the publication where they point out that the bumps on the ulna of Concavenator are on the anterolateral which is unlike remiges which are in a posterolateral on the ulna of some birds, they consider it more likely that these are attachments for interosseous ligaments. [97] This was refuted by Cuesta Fidalgo and her colleagues, they pointed out that these bumps on the ulna are posterolateral which is unlike that of interosseous ligaments. [98]Johnston, Nicole & Parsons, Jean (20 September 2018). "Feathers: Endangered – Fauna and Fashion". University of Missouri's Historic Costume and Textiles Collection.

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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.Feathers have adorned hats at many prestigious events such as weddings and Ladies Day at racecourses (Royal Ascot). McGraw, KH; Nogare, MC (2005). "Distribution of unique red feather pigments in parrots". Biology Letters. 1 (1): 38–43. doi: 10.1098/rsbl.2004.0269. PMC 1629064. PMID 17148123. Eagle feathers have great cultural and spiritual value to American Indians in the US and First Nations peoples in Canada as religious objects. In the United States, the religious use of eagle and hawk feathers is governed by the eagle feather law, a federal law limiting the possession of eagle feathers to certified and enrolled members of federally recognized Native American tribes.