18 THE AUDUBON BULLETIN 



Number 17070 is a fighter of unusual ability and proclaims 

 it in a very loud voice. As soon as the hand is put into the trap 

 he starts his challenging, and when the hand gets near he ad- 

 vances to attack and springs on the hand, pecking with all his 

 might, and never gives up a single instant while in the hand 

 being examined, and after release flies to the nearest branch to 

 sulk and scold. 



The Whitethroats are acting just the same as last year; 

 about a dozen staying around like regular boarders, and we ex- 

 pect we will have to feed them until a good storm comes and 

 moves them southward. 



The Audubon Bulletin for Fall 1921 contained an article 

 on "Securing Life Stories by Bird Banding", which described 

 how a male Robin that was trapped, banded and released in 1920 

 returned to be trapped again in 1921, and how a good looking 

 Mother Robin was trapped and banded the same day, as 18030; 

 later they were both trapped in a trap Robin Shelter, and proved 

 to be a mated pair, and their family was also banded. The story 

 ended with our hopes running high in expectation for returns 

 in 1922. 



Well, we were pleased of course when the good looking 

 Mother Robin 18030 was again trapped in 1922, and we keot 

 a constant watch for the Father Robin No. 57617, but we could 

 not find him, or just where the Mother had her nest, but later 

 the sad reason was discovered by the Park Policeman when he 

 found a cat with a Robin, and discovered the band that proved the 

 end of Mother Robin 18030. Now our work of proving Robin 

 history must begin all over again, but some day we hope to be- 

 able to tell you if Robins keep the same mates through life. 



Wm. I. Lyon 



The Canolia Mounds 



A recent bulletin of the Illinois State Museum by A. R. Crook, 

 Director, contains a noteworthy discussion of the theories relat- 

 ing to the origin of the Cahokia mounds and a summary of the 

 most recent conclusions of investigators. Six years ago Profes- 

 sor Crook made some studies of Monks' Mound and was dis- 

 posed to regard all of these mounds as of natural origin. More 

 recent studies made in collaboration with Dr. M. M. Leighton, 

 professor of pleistocene geology at the University of Illinois, 

 who favored the theory that the mounds are artificial, have 

 brought Professor Crook to support that theory. The discus- 

 sion is accompanied by some very interesting photographs of the 

 area made by aeroplane photography, the work of Lieutenant 

 G. W. Goddard, of the Army Service. The bulletin is a valua- 

 ble contribution to the study of primitive man in the Illinois 

 area. Copies of this bulletin may be obtained upon application 

 to the Illinois State Museum, Springfield, Illinois. 



