HOW A FLICKER FEEDS HER YOUNG 27 



common than has ever been determined. If an 

 old bird is seen to put her bill down a young one's 

 throat and keep it there even so short a time as 

 a second, it is probable that she is feeding the 

 little one by regurgitation, that is, by pumping 

 up food from her own stomach. Any bird seen 

 doing this should be carefully watched. It has 

 long been known that the domestic pigeon does 

 this, and the same has been observed a number 

 of times of the ruby-throated hummingbird. A 

 California lady has taken some remarkable pho- 

 tographs of the Anna's hummingbird in the act, 

 showing just how it is done. 



