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 
