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As a matter of fact, we know that dinosaurs developed wings a number of times in their evolution from small dinosaur raptors. Benton, Michael [3]Archived 2022-02-24 at the Wayback Machine
Terborgh J 2005. Mixed flocks and polyspecific associations: costs and benefits of mixed groups to birds and monkeys. American Journal of Primatology. 21 (2): 87–100. [4]Archived 2021-07-10 at the Wayback Machine
Sayol F. et al. 2020. Anthropogenic extinctions conceal widespread evolution of flightlessness in birds. Science Advances. 6 (49):eabb6095, DOI: 10.1126/sciadv.abb6095. [5]Archived 2021-08-06 at the Wayback Machine
Zaher, Mostafa 2012. Anatomical, histological and histochemical adaptations of the avian alimentary canal to their food habits: I-Coturnix coturnix. Life Science Journal9: 252–275. [6]Archived 2021-10-29 at the Wayback Machine
Meurisse J. Gonzalez A. Delsol, G. Caba M. Levy F. Poindron P. 2005. Estradiol receptor-α expression in hypothalamic and limbic regions of ewes is influenced by physiological state and maternal experience. Hormones and Behavior. 48 (1): 34–43. [8]Archived 2021-07-10 at the Wayback Machine
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Longrich, Nicholas R. 2012. Primitive wing feather arrangement in Archaeopteryx lithographica and Anchiornis huxleyi. Current Biology22, 23, 2262-2267. [10]Archived 2020-09-04 at the Wayback Machine
Influence of Earth's history on the dawn of modern birds. www.sciencedaily.com. American Museum of Natural History 2015. [11]Archived 2019-04-03 at the Wayback Machine
Spalding D.A. 1873. Macmillan's Magazine27, 282–293. Popular Science Monthly gives the same content: [2]Archived 2021-07-09 at the Wayback Machine
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Thorpe W.H. 1958. The learning of song patterns by birds, with especial reference to the song of the chaffinch Fringilla coelebs. Birds100, 4, p535-570. [9]Archived 2021-07-09 at the Wayback Machine
As a matter of fact, we know that dinosaurs developed wings a number of times in their evolution from small dinosaur raptors. Benton, Michael [3]Archived 2022-02-24 at the Wayback Machine
