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.

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

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