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 Food. In this category "Chicken" we have 108 free PNG images with transparent background.

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  Chicken Bucket Kfc PNG Image High Quality
  Format: PNG
  Resolution: 1046x1336
  Size: 1.8MB
  Downloads: 63
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  Chicken Fried Wings HD Image Free
  Format: PNG
  Resolution: 1773x826
  Size: 1.8MB
  Downloads: 62
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  Chicken Fried Wings Download HQ
  Format: PNG
  Resolution: 900x900
  Size: 402.2KB
  Downloads: 62
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  Chicken Crunchy Kfc HQ Image Free
  Format: PNG
  Resolution: 1217x572
  Size: 634.5KB
  Downloads: 62
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  Chicken Fried Free PNG HQ
  Format: PNG
  Resolution: 1285x1306
  Size: 472.9KB
  Downloads: 62
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  Popeyes Chicken Fried Crispy Photos
  Format: PNG
  Resolution: 1153x781
  Size: 1.4MB
  Downloads: 62
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  Chicken Fried Wings Free Clipart HD
  Format: PNG
  Resolution: 1890x1890
  Size: 1.3MB
  Downloads: 61
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  Grill Chicken Barbecue Free HD Image
  Format: PNG
  Resolution: 1795x1322
  Size: 4.9MB
  Downloads: 61
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  Popeyes Chicken Fried Crispy HQ Image Free
  Format: PNG
  Resolution: 576x410
  Size: 509.1KB
  Downloads: 61
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  Photos Chicken Bucket Kfc Free Photo
  Format: PNG
  Resolution: 800x590
  Size: 834.1KB
  Downloads: 60
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  Chicken Fried Download Free Image
  Format: PNG
  Resolution: 1155x736
  Size: 1.4MB
  Downloads: 59
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  Popeyes Chicken Fried Crispy Download HD
  Format: PNG
  Resolution: 668x460
  Size: 121.0KB
  Downloads: 58
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  Chicken Wings Free PNG HQ
  Format: PNG
  Resolution: 741x555
  Size: 428.0KB
  Downloads: 56
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  Chicken Wings Free HQ Image
  Format: PNG
  Resolution: 650x651
  Size: 279.1KB
  Downloads: 56
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  Chicken Fried Free HQ Image
  Format: PNG
  Resolution: 1024x664
  Size: 1006.8KB
  Downloads: 56
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  Chicken Pic Bucket Kfc Download HD
  Format: PNG
  Resolution: 500x251
  Size: 57.0KB
  Downloads: 54
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  Barbecue Chicken Vector Free Clipart HQ
  Format: PNG
  Resolution: 512x512
  Size: 30.9KB
  Downloads: 53
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  Chicken Fried PNG Image High Quality
  Format: PNG
  Resolution: 1200x538
  Size: 150.0KB
  Downloads: 53
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  Chicken Wings PNG File HD
  Format: PNG
  Resolution: 920x587
  Size: 499.1KB
  Downloads: 52
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  Barbecue Chicken Pork Free HQ Image
  Format: PNG
  Resolution: 960x677
  Size: 1.2MB
  Downloads: 52

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