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 Fried Pic Wings HD Image Free PNG Image
    Chicken Fried Pic Wings HD Image Free
    Format: PNG
    Resolution: 765x390
    Size: 415.8KB
    Downloads: 97
  • Chicken Fried Popeyes Free Transparent Image HD PNG Image
    Chicken Fried Popeyes Free Transparent Image HD
    Format: PNG
    Resolution: 800x400
    Size: 510.8KB
    Downloads: 96
  • Picture Chicken Wings Free Transparent Image HQ PNG Image
    Picture Chicken Wings Free Transparent Image HQ
    Format: PNG
    Resolution: 634x409
    Size: 346.5KB
    Downloads: 95
  • Photos Chicken Wings Download HQ PNG Image
    Photos Chicken Wings Download HQ
    Format: PNG
    Resolution: 820x435
    Size: 194.8KB
    Downloads: 95
  • Chicken Fried Free Download Image PNG Image
    Chicken Fried Free Download Image
    Format: PNG
    Resolution: 1579x765
    Size: 1.4MB
    Downloads: 94
  • Chicken Fried Wings Free Transparent Image HD PNG Image
    Chicken Fried Wings Free Transparent Image HD
    Format: PNG
    Resolution: 860x567
    Size: 546.2KB
    Downloads: 94
  • Chicken Crunchy Pic Kfc PNG Image High Quality PNG Image
    Chicken Crunchy Pic Kfc PNG Image High Quality
    Format: PNG
    Resolution: 1920x1142
    Size: 2.8MB
    Downloads: 93
  • Barbecue Chicken Roasted PNG Download Free PNG Image
    Barbecue Chicken Roasted PNG Download Free
    Format: PNG
    Resolution: 1962x563
    Size: 431.2KB
    Downloads: 93
  • Photos Chicken Kfc Free HQ Image PNG Image
    Photos Chicken Kfc Free HQ Image
    Format: PNG
    Resolution: 850x665
    Size: 640.8KB
    Downloads: 93
  • Barbecue Chicken Vector Seekh Free Clipart HD PNG Image
    Barbecue Chicken Vector Seekh Free Clipart HD
    Format: PNG
    Resolution: 514x481
    Size: 65.9KB
    Downloads: 92
  • Chicken Bucket Kfc HD Image Free PNG Image
    Chicken Bucket Kfc HD Image Free
    Format: PNG
    Resolution: 601x450
    Size: 147.5KB
    Downloads: 91
  • Picture Chicken Wings Download Free Image PNG Image
    Picture Chicken Wings Download Free Image
    Format: PNG
    Resolution: 1224x570
    Size: 316.1KB
    Downloads: 90
  • Chicken Pic Wings Free Clipart HD PNG Image
    Chicken Pic Wings Free Clipart HD
    Format: PNG
    Resolution: 900x546
    Size: 385.2KB
    Downloads: 89
  • Chicken Kfc Free Clipart HQ PNG Image
    Chicken Kfc Free Clipart HQ
    Format: PNG
    Resolution: 799x471
    Size: 535.2KB
    Downloads: 89
  • Barbecue Chicken Vector Free Download PNG HD PNG Image
    Barbecue Chicken Vector Free Download PNG HD
    Format: PNG
    Resolution: 612x603
    Size: 311.8KB
    Downloads: 88
  • Chicken Fried Free PNG HQ PNG Image
    Chicken Fried Free PNG HQ
    Format: PNG
    Resolution: 1599x866
    Size: 1.6MB
    Downloads: 88
  • Chicken Bucket Kfc Free HD Image PNG Image
    Chicken Bucket Kfc Free HD Image
    Format: PNG
    Resolution: 500x630
    Size: 107.9KB
    Downloads: 87
  • Chicken Fried Popeyes Free Download Image PNG Image
    Chicken Fried Popeyes Free Download Image
    Format: PNG
    Resolution: 549x446
    Size: 85.9KB
    Downloads: 86
  • Barbecue Chicken Seekh HD Image Free PNG Image
    Barbecue Chicken Seekh HD Image Free
    Format: PNG
    Resolution: 700x389
    Size: 100.9KB
    Downloads: 86
  • Chicken Fried Wings Free Download PNG HQ PNG Image
    Chicken Fried Wings Free Download PNG HQ
    Format: PNG
    Resolution: 835x498
    Size: 437.9KB
    Downloads: 85

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