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 Transparent Image PNG Image
    Chicken Transparent Image
    Format: PNG
    Resolution: 540x640
    Size: 118.4KB
    Downloads: 421
  • Cooked Chicken Photos PNG Image
    Cooked Chicken Photos
    Format: PNG
    Resolution: 500x500
    Size: 317.5KB
    Downloads: 509
  • Chicken Transparent PNG Image
    Chicken Transparent
    Format: PNG
    Resolution: 900x886
    Size: 363.5KB
    Downloads: 606
  • Cooked Chicken Clipart PNG Image
    Cooked Chicken Clipart
    Format: PNG
    Resolution: 904x600
    Size: 498.2KB
    Downloads: 448
  • Cooked Chicken Transparent PNG Image
    Cooked Chicken Transparent
    Format: PNG
    Resolution: 740x774
    Size: 620.6KB
    Downloads: 420
  • Cooked Chicken Transparent Image PNG Image
    Cooked Chicken Transparent Image
    Format: PNG
    Resolution: 904x600
    Size: 813.6KB
    Downloads: 958
  • Chicken Image PNG Image
    Chicken Image
    Format: PNG
    Resolution: 2055x2256
    Size: 1.5MB
    Downloads: 444
  • Cooked Chicken File PNG Image
    Cooked Chicken File
    Format: PNG
    Resolution: 1200x799
    Size: 1.7MB
    Downloads: 384
  • Chicken Photos PNG Image
    Chicken Photos
    Format: PNG
    Resolution: 1812x2486
    Size: 1.7MB
    Downloads: 357
  • Chicken File PNG Image
    Chicken File
    Format: PNG
    Resolution: 1772x3161
    Size: 1.9MB
    Downloads: 400
  • Cooked Chicken Image PNG Image
    Cooked Chicken Image
    Format: PNG
    Resolution: 1457x972
    Size: 1.9MB
    Downloads: 609
  • Chicken Clipart PNG Image
    Chicken Clipart
    Format: PNG
    Resolution: 2580x1939
    Size: 2.1MB
    Downloads: 427
  • Chicken Wings Free Download PNG HD PNG Image
    Chicken Wings Free Download PNG HD
    Format: PNG
    Resolution: 600x600
    Size: 207.5KB
    Downloads: 64
  • Chicken Wings PNG Download Free PNG Image
    Chicken Wings PNG Download Free
    Format: PNG
    Resolution: 960x350
    Size: 145.4KB
    Downloads: 76
  • Chicken Wings Free PNG HQ PNG Image
    Chicken Wings Free PNG HQ
    Format: PNG
    Resolution: 741x555
    Size: 428.0KB
    Downloads: 56
  • Chicken Wings Free Download PNG HD PNG Image
    Chicken Wings Free Download PNG HD
    Format: PNG
    Resolution: 860x413
    Size: 217.3KB
    Downloads: 47
  • Chicken Wings Free Download PNG HD PNG Image
    Chicken Wings Free Download PNG HD
    Format: PNG
    Resolution: 820x362
    Size: 162.4KB
    Downloads: 49
  • Chicken Wings Free HQ Image PNG Image
    Chicken Wings Free HQ Image
    Format: PNG
    Resolution: 650x651
    Size: 279.1KB
    Downloads: 56
  • Chicken Wings Download Free Image PNG Image
    Chicken Wings Download Free Image
    Format: PNG
    Resolution: 860x462
    Size: 321.6KB
    Downloads: 65
  • Chicken Wings Download Free Image PNG Image
    Chicken Wings Download Free Image
    Format: PNG
    Resolution: 860x553
    Size: 528.8KB
    Downloads: 100

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