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.

  • Barbecue Chicken Download Free Image PNG Image
    Barbecue Chicken Download Free Image
    Format: PNG
    Resolution: 672x430
    Size: 275.3KB
    Downloads: 100
  • Barbecue Chicken Pork Free HQ Image PNG Image
    Barbecue Chicken Pork Free HQ Image
    Format: PNG
    Resolution: 960x677
    Size: 1.2MB
    Downloads: 52
  • Barbecue Chicken Roasted Free Download Image PNG Image
    Barbecue Chicken Roasted Free Download Image
    Format: PNG
    Resolution: 550x300
    Size: 292.2KB
    Downloads: 45
  • Barbecue Chicken Roasted PNG Download Free PNG Image
    Barbecue Chicken Roasted PNG Download Free
    Format: PNG
    Resolution: 1962x563
    Size: 431.2KB
    Downloads: 93
  • 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
  • Chicken Crunchy Kfc PNG Image High Quality PNG Image
    Chicken Crunchy Kfc PNG Image High Quality
    Format: PNG
    Resolution: 1465x735
    Size: 1.5MB
    Downloads: 47
  • Chicken Crunchy Kfc Download Free Image PNG Image
    Chicken Crunchy Kfc Download Free Image
    Format: PNG
    Resolution: 500x500
    Size: 151.8KB
    Downloads: 75
  • 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
  • Photos Chicken Bucket Kfc Free Photo PNG Image
    Photos Chicken Bucket Kfc Free Photo
    Format: PNG
    Resolution: 800x590
    Size: 834.1KB
    Downloads: 60
  • Chicken Pic Bucket Kfc Download HD PNG Image
    Chicken Pic Bucket Kfc Download HD
    Format: PNG
    Resolution: 500x251
    Size: 57.0KB
    Downloads: 54
  • Chicken Bucket Kfc PNG Image High Quality PNG Image
    Chicken Bucket Kfc PNG Image High Quality
    Format: PNG
    Resolution: 500x435
    Size: 215.4KB
    Downloads: 74
  • Chicken Kfc Free Download PNG HQ PNG Image
    Chicken Kfc Free Download PNG HQ
    Format: PNG
    Resolution: 1579x765
    Size: 2.1MB
    Downloads: 79
  • Chicken Kfc Free Clipart HQ PNG Image
    Chicken Kfc Free Clipart HQ
    Format: PNG
    Resolution: 799x471
    Size: 535.2KB
    Downloads: 89
  • Chicken Kfc Free Clipart HD PNG Image
    Chicken Kfc Free Clipart HD
    Format: PNG
    Resolution: 585x382
    Size: 415.1KB
    Downloads: 83
  • Photos Chicken Fried Free Download PNG HQ PNG Image
    Photos Chicken Fried Free Download PNG HQ
    Format: PNG
    Resolution: 1153x781
    Size: 1.4MB
    Downloads: 72
  • 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
  • Chicken Fried PNG Image High Quality PNG Image
    Chicken Fried PNG Image High Quality
    Format: PNG
    Resolution: 1200x538
    Size: 150.0KB
    Downloads: 53
  • 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 Download HD PNG Image
    Popeyes Chicken Fried Crispy Download HD
    Format: PNG
    Resolution: 668x460
    Size: 121.0KB
    Downloads: 58
  • Chicken Fried Popeyes Free Clipart HQ PNG Image
    Chicken Fried Popeyes Free Clipart HQ
    Format: PNG
    Resolution: 615x576
    Size: 157.3KB
    Downloads: 64

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