Characterization of Phenotypic Variation in Indigenous Chicken Populations in Lower Northern Thailand to Improve Chicken Breeding

Figure 3

Variation in qualitative traits of comb type and beak color in the native chicken breeds. Note. (a) Single comb, (b) walnut comb, (c) blackish-green beak, and (d) ivory beak.

(a)

(b)

(c)

(d)