106 



into Michigan. Mr. Jerome Trombley notes that they were present at Peters- 

 burgh, Mich., in January and Ftbruary, 1886, also February 9, 1887. In winter 

 they seek the more sheltered places, usually away from our homes, hence it is 



Head of Robin, nat. size. 



rarely one sees them, even though they may be found. I have a number of ref- 

 erences from central and northern Indiana concerning their occurrence in winter. 



Qenus SIALIA Swainson. 



"305. Sialia sialis (Linn.). Bluebird. 



Common summer resident; resident also, most numerous southward, but vary- 

 ing much in numbers different years; breeds. I do not think they are nearly so 

 numerous as they were twelve or fifteen years ago. Certainly this is the case about 

 our towns, where they have been driven off and their nesting sites occupied by the 

 aggressive and unwelcome English Sparrow. 



