viii CONTENTS 



CHAPTER XII 



Special instincts of birds The play of young birds and of adults 

 Bower-builders and their peculiarities Ornamentation of 

 nests The instinct for food-storage in some forms The 

 practice of piracy Toilet and bed-time habits pp. 303-318 



CHAPTER XIII 



Special physiological peculiarities of birds Longevity Tempera- 

 ture of body Change of colour in bare skin of some, such as 

 Turkey The phenomena of the moult Gradual change in 

 colour of bill and feet according to age and sex or season 

 Changes in iris colour Beak-sheath shedding as in Puffin 



pp. 319-328 



CHAPTER XIV - 



Abnormalities Hybrids, their characteristics and power of repro- 

 duction or otherwise Abnormal plumages, such as albinism 

 or melanism, temporary or permanent Overgrowth of claws 

 and bill pp. 329-342 



CHAPTER XV 



Relations of birds with men Persecuted species Parasitic or 

 commensal species Domestic forms Introduced forms and 

 the results of introduction . . . .pp. 343~3S6 



INDEX pp. 357-363 



