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
  Format: PNG
  Resolution: 672x430
  Size: 275.3KB
  Downloads: 100
• 

  Barbecue Chicken Pork Free HQ Image
  Format: PNG
  Resolution: 960x677
  Size: 1.2MB
  Downloads: 52
• 

  Barbecue Chicken Roasted Free Download Image
  Format: PNG
  Resolution: 550x300
  Size: 292.2KB
  Downloads: 45
• 

  Barbecue Chicken Roasted PNG Download Free
  Format: PNG
  Resolution: 1962x563
  Size: 431.2KB
  Downloads: 93
• 

  Chicken Crunchy Pic Kfc PNG Image High Quality
  Format: PNG
  Resolution: 1920x1142
  Size: 2.8MB
  Downloads: 93
• 

  Chicken Crunchy Kfc PNG Image High Quality
  Format: PNG
  Resolution: 1465x735
  Size: 1.5MB
  Downloads: 47
• 

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

  Chicken Bucket Kfc PNG Image High Quality
  Format: PNG
  Resolution: 1046x1336
  Size: 1.8MB
  Downloads: 63
• 

  Photos Chicken Bucket Kfc Free Photo
  Format: PNG
  Resolution: 800x590
  Size: 834.1KB
  Downloads: 60
• 

  Chicken Pic Bucket Kfc Download HD
  Format: PNG
  Resolution: 500x251
  Size: 57.0KB
  Downloads: 54
• 

  Chicken Bucket Kfc PNG Image High Quality
  Format: PNG
  Resolution: 500x435
  Size: 215.4KB
  Downloads: 74
• 

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

  Chicken Kfc Free Clipart HQ
  Format: PNG
  Resolution: 799x471
  Size: 535.2KB
  Downloads: 89
• 

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

  Photos Chicken Fried Free Download PNG HQ
  Format: PNG
  Resolution: 1153x781
  Size: 1.4MB
  Downloads: 72
• 

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

  Chicken Fried PNG Image High Quality
  Format: PNG
  Resolution: 1200x538
  Size: 150.0KB
  Downloads: 53
• 

  Chicken Fried Free PNG HQ
  Format: PNG
  Resolution: 1285x1306
  Size: 472.9KB
  Downloads: 62
• 

  Popeyes Chicken Fried Crispy Download HD
  Format: PNG
  Resolution: 668x460
  Size: 121.0KB
  Downloads: 58
• 

  Chicken Fried Popeyes Free Clipart HQ
  Format: PNG
  Resolution: 615x576
  Size: 157.3KB
  Downloads: 64

RELATED CATEGORIES

Owl

Jaguar

Polar Bear

Yoga

Crow

Sparrow

Grass

Crocodile

Chicken

Violin