X CONTENTS. 



Page 

 CHAPTER XII. 



Training of young Birds by their Parents . . .212 



Instinct 212 



Training of young Eagles 212 



The Stork ....... 214 



Remarks on the common opinion .... 214 



Instance from Salmon-fry . . . . .216 



Swallows and Sparrows ..... 216 



Warnings of danger ...... 218 



Anecdote from Smellie . . , .219 



Instructions in catching prey .... 221 



Rooks 222 



CHAPTER XIII. 



Vocal Organs of Birds 225 



Mechanism of the voice . . . . . 225 



Aldrovand's account of the Wild Swan . . . 231 



Another Wild Swan discovered by Mr. Kingcote . 233 



Vocal organs of birds according to Herissant . 235 



Remarks of Hunter, Cuvier, and Kircher . . . 236 

 Tongue of the Nightingale . . . .237 



Call-note of the Bittern 239 



Mistake of Thomson 243 



Bleating of the Snipe ...... 245 



Crowned Pigeon of Africa . . . , . 246 



CHAPTER XIV. 



Language of Birds \ . 247 



The Richel Bird 247 



Natural notes of alarm 247 



Theory of Darwin 249 



Variety in the language of birds .... 252 



Social signals for congregating .... 253 



Fables originating therefrom . , 256 



