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 Free Download PNG HQ PNG Image
    Chicken Bucket Kfc Free Download PNG HQ
    Format: PNG
    Resolution: 600x600
    Size: 354.7KB
    Downloads: 85
  • Barbecue Chicken Serving Download HD PNG Image
    Barbecue Chicken Serving Download HD
    Format: PNG
    Resolution: 800x459
    Size: 142.2KB
    Downloads: 84
  • Chicken Kfc Free HQ Image PNG Image
    Chicken Kfc Free HQ Image
    Format: PNG
    Resolution: 1634x929
    Size: 1.6MB
    Downloads: 84
  • Chicken Kfc Free Clipart HD PNG Image
    Chicken Kfc Free Clipart HD
    Format: PNG
    Resolution: 585x382
    Size: 415.1KB
    Downloads: 83
  • Chicken Fried Wings Free Download PNG HD PNG Image
    Chicken Fried Wings Free Download PNG HD
    Format: PNG
    Resolution: 1000x1000
    Size: 765.7KB
    Downloads: 82
  • Chicken Fried Free HD Image PNG Image
    Chicken Fried Free HD Image
    Format: PNG
    Resolution: 516x348
    Size: 310.0KB
    Downloads: 81
  • Picture Chicken Fried Wings Free Clipart HQ PNG Image
    Picture Chicken Fried Wings Free Clipart HQ
    Format: PNG
    Resolution: 1001x1001
    Size: 907.8KB
    Downloads: 80
  • Barbecue Chicken Drumstick PNG File HD PNG Image
    Barbecue Chicken Drumstick PNG File HD
    Format: PNG
    Resolution: 500x305
    Size: 201.5KB
    Downloads: 80
  • Chicken Crunchy Kfc Download Free Image PNG Image
    Chicken Crunchy Kfc Download Free Image
    Format: PNG
    Resolution: 1984x1000
    Size: 1.0MB
    Downloads: 80
  • Images Chicken Wings Free Download Image PNG Image
    Images Chicken Wings Free Download Image
    Format: PNG
    Resolution: 811x450
    Size: 702.2KB
    Downloads: 79
  • Chicken Kfc Free Download PNG HQ PNG Image
    Chicken Kfc Free Download PNG HQ
    Format: PNG
    Resolution: 1579x765
    Size: 2.1MB
    Downloads: 79
  • Chicken Fried Free Transparent Image HD PNG Image
    Chicken Fried Free Transparent Image HD
    Format: PNG
    Resolution: 700x349
    Size: 391.1KB
    Downloads: 77
  • Chicken Wings PNG Download Free PNG Image
    Chicken Wings PNG Download Free
    Format: PNG
    Resolution: 960x350
    Size: 145.4KB
    Downloads: 76
  • Chicken Wings Free Download Image PNG Image
    Chicken Wings Free Download Image
    Format: PNG
    Resolution: 900x449
    Size: 300.9KB
    Downloads: 76
  • Barbecue Chicken Grill Download HQ PNG Image
    Barbecue Chicken Grill Download HQ
    Format: PNG
    Resolution: 750x500
    Size: 606.2KB
    Downloads: 76
  • Chicken Fried Pic Free Transparent Image HQ PNG Image
    Chicken Fried Pic Free Transparent Image HQ
    Format: PNG
    Resolution: 620x300
    Size: 79.1KB
    Downloads: 76
  • Popeyes Chicken Fried Crispy Free Download Image PNG Image
    Popeyes Chicken Fried Crispy Free Download Image
    Format: PNG
    Resolution: 1920x1142
    Size: 2.9MB
    Downloads: 76
  • Chicken Crunchy Kfc Download Free Image PNG Image
    Chicken Crunchy Kfc Download Free Image
    Format: PNG
    Resolution: 500x500
    Size: 151.8KB
    Downloads: 75
  • Chicken Kfc Download HD PNG Image
    Chicken Kfc Download HD
    Format: PNG
    Resolution: 1133x664
    Size: 795.5KB
    Downloads: 75
  • Chicken Wings Free Transparent Image HQ PNG Image
    Chicken Wings Free Transparent Image HQ
    Format: PNG
    Resolution: 1234x1064
    Size: 2.4MB
    Downloads: 74

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