I am not prepared 

 to affirm that they 

 are from the di- 

 gestive laboratory 

 of the owl. Some- 

 thing in their size 

 suggests that a 

 hawk is equally 



likely to be respon- 

 sible for them, all 

 the birds of prey hav- 

 ing this same singular 

 habit of ejecting the in- 

 digestible portions of 

 animals which they de- 

 vour. A pet red-tailed 

 hawk which I kept dur- 

 ing the past summer lit- 

 tered its pen with pellets 



