372 ANNUAL REPORT SMITHSONIAN INSTITUTION, 11)21. 



extent. In this conclusion 1 am naturally excepting "courtship" 

 flight, which is usually of an accelerated nature. 



I also find, after eliminating abnormal conditions and observa- 

 tions based on meager evidence, that the normal and migratory rate 

 of flight in miles per hour is as follows : — 



Corvidae 31-45 



Smaller passeres 20-37 



Geese 42-£5 



Tame pigeons 30-36 



Waders 34-51, but mostly from 40-51. 



Starlings 38-19 



Falcons 40-48 



Ducks . 44-59 



Sandgrouse 43—17 



