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 Animals. In this category "Chicken" we have 45 free PNG images with transparent background.

  • Gray Chicken Png Image PNG Image
    Gray Chicken Png Image
    Format: PNG
    Resolution: 900x1151
    Size: 338.7KB
    Downloads: 817
  • Chicken Png Image PNG Image
    Chicken Png Image
    Format: PNG
    Resolution: 2700x2536
    Size: 2.5MB
    Downloads: 801
  • Chicken Png Image PNG Image
    Chicken Png Image
    Format: PNG
    Resolution: 2206x2274
    Size: 1.5MB
    Downloads: 769
  • Chicken Png Image PNG Image
    Chicken Png Image
    Format: PNG
    Resolution: 1849x2061
    Size: 1.4MB
    Downloads: 727
  • Chicken Png Image PNG Image
    Chicken Png Image
    Format: PNG
    Resolution: 1812x2486
    Size: 1.7MB
    Downloads: 707
  • Picture Chicken Png Image PNG Image
    Picture Chicken Png Image
    Format: PNG
    Resolution: 674x800
    Size: 40.5KB
    Downloads: 701
  • Chicken Png Image PNG Image
    Chicken Png Image
    Format: PNG
    Resolution: 1000x799
    Size: 139.7KB
    Downloads: 688
  • Chicken Png Image PNG Image
    Chicken Png Image
    Format: PNG
    Resolution: 1811x2484
    Size: 1.7MB
    Downloads: 591
  • Chicken Png Image PNG Image
    Chicken Png Image
    Format: PNG
    Resolution: 2546x2431
    Size: 1.9MB
    Downloads: 534
  • Chicken Png Image PNG Image
    Chicken Png Image
    Format: PNG
    Resolution: 1902x2802
    Size: 1.4MB
    Downloads: 459
  • Chicken Png Image PNG Image
    Chicken Png Image
    Format: PNG
    Resolution: 1910x2272
    Size: 1.0MB
    Downloads: 451
  • Chicken Png Image PNG Image
    Chicken Png Image
    Format: PNG
    Resolution: 1499x2165
    Size: 1013.0KB
    Downloads: 409
  • Chicken White Curry Hen Free Photo PNG PNG Image
    Chicken White Curry Hen Free Photo PNG
    Format: PNG
    Resolution: 2250x2316
    Size: 2.4MB
    Downloads: 273
  • King Vkontakte Telegram Sticker Fries French Burger PNG Image
    King Vkontakte Telegram Sticker Fries French Burger
    Format: PNG
    Resolution: 512x512
    Size: 97.8KB
    Downloads: 238
  • And Cheese Sandwich Hamburger Ham King Cheeseburger PNG Image
    And Cheese Sandwich Hamburger Ham King Cheeseburger
    Format: PNG
    Resolution: 500x540
    Size: 185.9KB
    Downloads: 236
  • Tattoo Chicken Haan Rooster Download HQ PNG PNG Image
    Tattoo Chicken Haan Rooster Download HQ PNG
    Format: PNG
    Resolution: 599x734
    Size: 114.6KB
    Downloads: 233
  • King Whopper Tendercrisp Fingers Burger Sandwiches Grilled PNG Image
    King Whopper Tendercrisp Fingers Burger Sandwiches Grilled
    Format: PNG
    Resolution: 500x540
    Size: 254.4KB
    Downloads: 233
  • Butter King Sandwich Burger Schnitzel Chicken Fried PNG Image
    Butter King Sandwich Burger Schnitzel Chicken Fried
    Format: PNG
    Resolution: 1285x1306
    Size: 472.9KB
    Downloads: 216
  • Portable Pollinator Graphics Chicken Bird Network PNG Image
    Portable Pollinator Graphics Chicken Bird Network
    Format: PNG
    Resolution: 699x921
    Size: 84.2KB
    Downloads: 208
  • Grill Sleeve Relations Barbecue Chicken Fried Public PNG Image
    Grill Sleeve Relations Barbecue Chicken Fried Public
    Format: PNG
    Resolution: 1024x676
    Size: 541.0KB
    Downloads: 169

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