258 ANIMAL INTELLIGENCE 



The sense of support is very fully developed almost 

 or quite from the beginning. 



Voice is present in a few days after hatching. 



Motor co-ordinations peculiar to birds, and the power 

 of recognising their own nest, parents, etc., are gradually 

 but well developed. 



Physical changes peculiar to this group of birds, and 

 with modifications for each variety, occur at fairly 

 definite periods, are closely related in time, and are 

 probably in some way bound up with psychic changes. 



The Domestic Fowl. 



This bird is so different in many respects from the 

 pigeon, that I have thought it better to keep the notes 

 I have taken apart. 



These observations were made on pure-bred Anda- 

 lusian chicks, though many others have been studied. 



Diary. 



Chick A, hatched. out some time before daylight, is 

 taken from the nest for the first time, and tested at 

 4.30 P.M. 



It pecks three times in succession at a very small 

 speck on the table, and touches it each time. It strikes 

 a crumb about a \ inch in diameter two or three times, 

 and then swallows it. 



Soon after it pecks at a smaller crumb, and takes it 

 up and swallows it on the first attempt. 



It also pecks accurately at a dark spot on the table. 



Chick B, of about the same age (same hatch), picks 

 up bread-crumbs and particles of hard-boiled yolk of 

 egg without missing. 



