Plate 4. Grouse Chicks at Different Ages. A (Upper left). One day old-a 

 cute, completely downy little fellow. B (Upper right). At five days of age, the 

 chick shows marked improvement in wing feathering. C (Lower left). By the 

 time seventeen days have passed, the wings are well developed, and it can fly 

 short distances. D (Lower right). At five weeks of age the juvenile feathering is 

 quite complete with tail and all. It now resembles a small edition of its parents 

 and can night-roost by itself. Photos by A. A. Allen. 



