NOTES. 



185 



dirty condition of the nest after the young had flown. On 

 the other hand the Chaffinches invariably carried away the 

 fceces, and the nest was quite neat ?.nd clean when vacated. 



NEST OF GREENFINCH TO SHOW ITS DIRTY CONDITION 

 AFTER THE FLEDGING OF THE YOUNG. 



{Photoorapht'd by C. K. Siddall.) 



The habits of the other two pairs of Greenfinches \\ere 

 similar, and the nests in the same foul condition after use. 



It would appear from the above that individuals of the 

 same species may differ in their behaviour. 



C. KiNGSLEY Siddall. 



[Perhaps the young Greenfinches in the nest watched by 

 Mr. Ford-Lindsay were very small. Certainly the dirty condition 

 of the nest as above described is usual in this species. — Eds.] 



THE CROSSBILL IRRUPTION. 



No advantage is likely to accrue from the publication of further 

 notes regarding the movements of Crossbills, unless indeed a 

 fresh irruption occurs. I should, however, wish to publish every 

 authentic instance of nesting, and \\o\x\A especially draw my 

 readers' attention to the importance of discovering whether 

 tlie bii'ds breed next year and, if so, in what numbers. 



I am making an attempt to draw up an account of the 

 course of the " irruption " of 1909-10, and shall be very 



