Fig. 2

Aa and Ba show the blotchy marks of the Agelastes meleagrides chick, which live in forests, compared with the striped markings, Ca and Da, of the Numida meleagris chick, which live in the open habitats. Agelastes meleagrides is regarded as plain, and N. meleagris as striped. Ea and Fa show the plain dorsal patterns and lateral eye stripe respectively of the Peliperdix lathami chick, which live in forests. Note that the latter possesses an eye stripe which is similar to the spurfowls. In fact, structurally, it is only the plain back that differentiates it from the spurfowls