x EVOLUTION OF BIRD-SONG 



CHAPTER IX 



THE INFLUENCE OF IMITATION IN RELATION TO BIRD-SONG 



Imitation by dogs and other animals The notes of some birds 

 wholly perpetuated by imitation ; of others wholly by inherit- 

 anceObservations of authors on the mimicry of birds 

 House-sparrow with lark's song, and other instances Pos- 



PAGES 



APPENDIX 



Transcripts of music sung by blackbirds, thrushes, and skylarks 241-246 



BIBLIOGRAPHY OF THE SUBJECT . . . 247, 248 



INDEX . 249-253 



