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
  Format: PNG
  Resolution: 600x600
  Size: 354.7KB
  Downloads: 85
• 

  Barbecue Chicken Serving Download HD
  Format: PNG
  Resolution: 800x459
  Size: 142.2KB
  Downloads: 84
• 

  Chicken Kfc Free HQ Image
  Format: PNG
  Resolution: 1634x929
  Size: 1.6MB
  Downloads: 84
• 

  Chicken Kfc Free Clipart HD
  Format: PNG
  Resolution: 585x382
  Size: 415.1KB
  Downloads: 83
• 

  Chicken Fried Wings Free Download PNG HD
  Format: PNG
  Resolution: 1000x1000
  Size: 765.7KB
  Downloads: 82
• 

  Chicken Fried Free HD Image
  Format: PNG
  Resolution: 516x348
  Size: 310.0KB
  Downloads: 81
• 

  Picture Chicken Fried Wings Free Clipart HQ
  Format: PNG
  Resolution: 1001x1001
  Size: 907.8KB
  Downloads: 80
• 

  Barbecue Chicken Drumstick PNG File HD
  Format: PNG
  Resolution: 500x305
  Size: 201.5KB
  Downloads: 80
• 

  Chicken Crunchy Kfc Download Free Image
  Format: PNG
  Resolution: 1984x1000
  Size: 1.0MB
  Downloads: 80
• 

  Images Chicken Wings Free Download Image
  Format: PNG
  Resolution: 811x450
  Size: 702.2KB
  Downloads: 79
• 

  Chicken Kfc Free Download PNG HQ
  Format: PNG
  Resolution: 1579x765
  Size: 2.1MB
  Downloads: 79
• 

  Chicken Fried Free Transparent Image HD
  Format: PNG
  Resolution: 700x349
  Size: 391.1KB
  Downloads: 77
• 

  Chicken Wings PNG Download Free
  Format: PNG
  Resolution: 960x350
  Size: 145.4KB
  Downloads: 76
• 

  Chicken Wings Free Download Image
  Format: PNG
  Resolution: 900x449
  Size: 300.9KB
  Downloads: 76
• 

  Barbecue Chicken Grill Download HQ
  Format: PNG
  Resolution: 750x500
  Size: 606.2KB
  Downloads: 76
• 

  Chicken Fried Pic Free Transparent Image HQ
  Format: PNG
  Resolution: 620x300
  Size: 79.1KB
  Downloads: 76
• 

  Popeyes Chicken Fried Crispy Free Download Image
  Format: PNG
  Resolution: 1920x1142
  Size: 2.9MB
  Downloads: 76
• 

  Chicken Crunchy Kfc Download Free Image
  Format: PNG
  Resolution: 500x500
  Size: 151.8KB
  Downloads: 75
• 

  Chicken Kfc Download HD
  Format: PNG
  Resolution: 1133x664
  Size: 795.5KB
  Downloads: 75
• 

  Chicken Wings Free Transparent Image HQ
  Format: PNG
  Resolution: 1234x1064
  Size: 2.4MB
  Downloads: 74

RELATED CATEGORIES

Owl

Jaguar

Polar Bear

Yoga

Crow

Sparrow

Grass

Crocodile

Chicken

Violin