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.
-
Grill Chicken Barbecue Free HD Image
Format: PNG
Resolution: 1795x1322
Size: 4.9MB
Downloads: 61
-
Barbecue Chicken Drumstick PNG File HD
Format: PNG
Resolution: 500x305
Size: 201.5KB
Downloads: 80
-
Barbecue Chicken Seekh HD Image Free
Format: PNG
Resolution: 700x389
Size: 100.9KB
Downloads: 86
-
Barbecue Chicken Serving Download HD
Format: PNG
Resolution: 800x459
Size: 142.2KB
Downloads: 84
-
Barbecue Chicken Vector Free Clipart HQ
Format: PNG
Resolution: 512x512
Size: 30.9KB
Downloads: 53
-
Chicken Crunchy Kfc Free Clipart HQ
Format: PNG
Resolution: 1400x1028
Size: 528.9KB
Downloads: 71
-
Chicken Crunchy Kfc HQ Image Free
Format: PNG
Resolution: 1217x572
Size: 634.5KB
Downloads: 62
-
Photos Chicken Crunchy Kfc PNG Image High Quality
Format: PNG
Resolution: 500x375
Size: 90.6KB
Downloads: 64
-
Chicken Bucket Kfc HQ Image Free
Format: PNG
Resolution: 792x557
Size: 604.1KB
Downloads: 72
-
Chicken Bucket Kfc Free HD Image
Format: PNG
Resolution: 500x630
Size: 107.9KB
Downloads: 87
-
Chicken Bucket Kfc HD Image Free
Format: PNG
Resolution: 601x450
Size: 147.5KB
Downloads: 91
-
Chicken Bucket Kfc Free Download PNG HQ
Format: PNG
Resolution: 600x600
Size: 354.7KB
Downloads: 85
-
Chicken Kfc Free HQ Image
Format: PNG
Resolution: 1634x929
Size: 1.6MB
Downloads: 84
-
Chicken Kfc Download HD
Format: PNG
Resolution: 640x349
Size: 81.1KB
Downloads: 71
-
Chicken Fried Free HQ Image
Format: PNG
Resolution: 1024x664
Size: 1006.8KB
Downloads: 56
-
Chicken Fried Free HD Image
Format: PNG
Resolution: 516x348
Size: 310.0KB
Downloads: 81
-
Chicken Fried Free PNG HQ
Format: PNG
Resolution: 1599x866
Size: 1.6MB
Downloads: 88
-
Chicken Fried Free Transparent Image HD
Format: PNG
Resolution: 700x349
Size: 391.1KB
Downloads: 77
-
Popeyes Chicken Fried Crispy PNG Free Photo
Format: PNG
Resolution: 850x665
Size: 264.3KB
Downloads: 45
-
Pic Popeyes Chicken Fried Crispy
Format: PNG
Resolution: 600x460
Size: 455.9KB
Downloads: 100
RELATED CATEGORIES