io2 ROOK 



consideration, makes the following singular remarks re- 

 specting this species : " I am ignorant whether scientific 

 naturalists can inform us with certainty as to the age at 

 which the Rook commences to breed ; no remarks on this 

 subject can be found in any works I have examined. As 

 far as I am able to judge from personal observations, it 

 appears probable that this species does not arrive at 

 maturity before the third year i.e., does not pair and nest 

 till it has arrived at the age of two years." 



