132 Bulletin Wisconsin Natural History Society. [Vol. 7, Nos. 3-4. 



right in stating that the study of bird migration has thus far been 

 limited to chronicles of arrival and departure up and down our 

 country, to weather conditions, or scarcity of food supply. 



BANK SWALLOW NESTING SITES. 



BY ALFRED C. BURKILL. 



Although bank swallows (Riparia riparia) about Milwaukee 

 and Madison make their homes in very high cliff banks, it is inter- 

 esting to note the variation of the instinct of this cosmopolitan 

 little bird in choosing nest-sites even in this hilly state, indicating 

 an adaptability to very low unprotected banks, as has been re- 

 ported of them in railroad banks crossing the western prairie 

 (E. Ingersoll, 1902, "Wild Life of Orchard and Field," p. 287). 

 About three or four miles south of Markesan, Green Lake Co., 

 Wis., there was a colony of some hundred or so holes in a little 

 creek bank facing mostly east, though a very tortuous meander, 

 in some places hardly 4 feet to the water and in others not 

 over 10 feet high. This tributary is, I believe, from Lake 

 Maria to Lake Puckaway. 



