Gallus gallus is a domesticated bird known as the chicken which is believed to have first bred in southeast Asia. Ever since Darwin, we have known that the chicken originated in southeast Asia, although the exact details of which one or more of several possible jungle fowls is the primal form has been debated. The idea that the existence of chicken is the contribution of more than one wild species has been on the table for a very long time. Notice the yellow legs on this chicken. If you pluck out the feathers, you will find the skin to be yellow as well. But if you go find, say, a crow, and pluck its feathers, it will be greyish in colour. The gist of this is that some birds are yellow while some are not.
There is a gene that is expressed in certain tissues that produces an enzyme that cleaves the carotenoid molecules that provide the yellow colour. You get a yellow bird (depending on other factors we shall ignore) if there is no functional copy of this gene. In short, it is confirmed by the new research that previously thought the red jungle fowl, Gallus gallus, is ancestral to the modern chicken, as Darwin suspected. But this research also suggests that another bird, the grey jungle fowl, Gallus sonneratii, also contributed to the chicken's genome, providing the yellow color we see on this chicken's legs.

In this sub category you can download free PNG images: Chicken Animals. In this category "Chicken" we have 45 free PNG images with transparent background.

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  Chicken Png Image
  Format: PNG
  Resolution: 2149x2367
  Size: 1.4MB
  Downloads: 836
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  Chicken Png Image
  Format: PNG
  Resolution: 243x329
  Size: 30.4KB
  Downloads: 1,494
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  Chicken Png Image
  Format: PNG
  Resolution: 219x295
  Size: 26.6KB
  Downloads: 1,116
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  Chicken Fried Wings PNG File HD
  Format: PNG
  Resolution: 900x680
  Size: 581.1KB
  Downloads: 77
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  Chicken Png Image
  Format: PNG
  Resolution: 3567x2796
  Size: 926.9KB
  Downloads: 982
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  Chicken Png Image
  Format: PNG
  Resolution: 1000x799
  Size: 139.7KB
  Downloads: 688
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  Chicken Png Image
  Format: PNG
  Resolution: 2546x2431
  Size: 1.9MB
  Downloads: 534
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  Chicken Png Image
  Format: PNG
  Resolution: 2370x3272
  Size: 5.3MB
  Downloads: 874
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  Chicken Png Image
  Format: PNG
  Resolution: 1902x2802
  Size: 1.4MB
  Downloads: 459
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  Grill Sleeve Relations Barbecue Chicken Fried Public
  Format: PNG
  Resolution: 1024x676
  Size: 541.0KB
  Downloads: 169
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  Chicken Wings Free Download Image
  Format: PNG
  Resolution: 570x418
  Size: 240.6KB
  Downloads: 67
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  Chicken Png Image
  Format: PNG
  Resolution: 1648x2753
  Size: 1.5MB
  Downloads: 856
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  Chicken Png Image
  Format: PNG
  Resolution: 2700x2536
  Size: 2.5MB
  Downloads: 801
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  Chicken Png Image
  Format: PNG
  Resolution: 300x321
  Size: 25.2KB
  Downloads: 823
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  Portable Pollinator Graphics Chicken Bird Network
  Format: PNG
  Resolution: 699x921
  Size: 84.2KB
  Downloads: 208
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  Chicken Crunchy Kfc Free Download PNG HQ
  Format: PNG
  Resolution: 620x300
  Size: 79.1KB
  Downloads: 96
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  King Whopper Tendercrisp Fingers Burger Sandwiches Grilled
  Format: PNG
  Resolution: 500x540
  Size: 254.4KB
  Downloads: 233
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  Chicken Png Image
  Format: PNG
  Resolution: 1665x2810
  Size: 1.5MB
  Downloads: 875
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  Tattoo Chicken Haan Rooster Download HQ PNG
  Format: PNG
  Resolution: 599x734
  Size: 114.6KB
  Downloads: 233
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  Chicken White Curry Hen Free Photo PNG
  Format: PNG
  Resolution: 2250x2316
  Size: 2.4MB
  Downloads: 273

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