THE PSYCHIC DEVELOPMENT OF YOUNG ANIMALS 251 



llth day. Feathers shooting from the skin, but 

 it is difficult to determine the exact colour yet. 



12th day. A great advance in growth and feathering 

 in twenty-four hours. 



When one approaches, it pecks hard, and uses its 

 wings offensively also. 



13th day. Colour of the bird, though one not 

 naturally easily made out, is now clear. 



14th day. When taken from the small compartment 

 in which its nest is, it walks back promptly and 

 well. 



16th day. The wings are well covered with feathers. 



18th day. The bird does not peck when approached, 

 but shrinks. 



When its wings are drawn out it pulls them in again 

 (as did the owl-pigeon on the 22nd day). 



2Qth day. Shrinks to-day, but when it gets back 

 into a corner of its nest it then pecks vigorously. 



24th day. Behaviour similar to that of 20th and 

 following days. 



28th day. Out of the nest, looking after itself to a 

 large extent, and beginning to fly. 



34th day. The iris is turning red. Hitherto it has 

 been of a dull, ill-defined colour. 



Another Dragoon-Pigeon, C, of different Parentage. 



Though the diary was kept in the same way as the 

 previous one, only such parts of it will be given here as 

 serve to bring out something new or to mark individual 

 differences. 



1st day. I could get no definite reaction to tests for 

 taste or smell. 



Eyes held closed, but can be opened. 



4th day. Holds its head somewhat differently 

 from B. 



