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Biologists from Darwin onwards [23] have puzzled over how evolution produces species whose adult members look extraordinarily alike, and distinctively different from the members of other species. Lions and leopards are, for instance, both large carnivores that inhabit the same general environment, and hunt much the same prey, but look quite ...
Leaves have evolved multiple times - see Evolutionary history of plants. They have evolved not only in land plants, but also in various algae, like kelp. [214] Prickles, thorns and spines are all modified plant tissues that have evolved to prevent or limit herbivory, these structures have evolved independently a number of times. [215]
The peacock continued to represent elegance and royalty in India during medieval times; for instance, the Mughal seat of power was called the Peacock Throne. The peacock is represented in both the Burmese and Sinhalese zodiacs. To the Sinhalese people, the peacock is the third animal of the zodiac of Sri Lanka. [35]
The phasianids have a varied diet, with foods taken ranging from purely vegetarian diets of seeds, leaves, fruits, tubers, and roots, to small animals including insects, insect grubs, and even small reptiles. Most species either specialise in feeding on plant matter or are predatory, although the chicks of most species are insectivorous.
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Galliformes / ˌ ɡ æ l ɪ ˈ f ɔːr m iː z / is an order of heavy-bodied ground-feeding birds that includes turkeys, chickens, quail, and other landfowl.Gallinaceous birds, as they are called, are important in their ecosystems as seed dispersers and predators, and are often reared by humans for their meat and eggs, or hunted as game birds.
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Sexual selection in birds concerns how birds have evolved a variety of mating behaviors, with the peacock tail being perhaps the most famous example of sexual selection and the Fisherian runaway. Commonly occurring sexual dimorphisms such as size and color differences are energetically costly attributes that signal competitive breeding ...