BIRDS. 307 



Michigan it breeds well north of northern boundary of this zone as 

 defined by Merriam.* 



126. Hylocichla fuscescens. Wilson's thrush. — Michigan: Com- 

 mon summer resident, breeding all over the state. 



Apparently rather rare on Sand Point but very common in the 

 sand region northeast of Caseville. It was a rare breeder on Sand 

 Point. Its habitat was the thick bushes between the swamps and 

 burnings. It was seen on June 15, 23, and 30, but rarely after the 

 latter date. Near Rush Lake it was a common breeder in the sand 

 country, and severaj could often be heard singing at one time all 

 during August. A nest containing two eggs was found, on August 

 17, on a sand dune near Hat Point. 



127. Planesticus migratorius. Robin.— Michigan: Abundant 

 summer resident, breeding all over the state. 



Apparently a rather rare breeder in the sand region and on Stony 

 Island, but common as a migrant. No nests were found, but it was 

 observed as^arly as June 27 on Sand Point, July 12 on Stony Island 

 and July 29 at Rush Lake. Only two birds were seen on Stony Is- 

 land. It became very common in the sand region in August. Large 

 flocks were seen on August 14 near the camp on Sand Point, feeding 

 on the*juneberry and blueberry bushes, and a few were seen feeding 

 on the wild red cherry near Long Lake on August 22. At Rush Lake 

 it became very common after August 10, when large flocks were seen 

 in both the sand region and clay country. Many in the former 

 habitat fed among the blueberries. 



128. Sialia sialis. Bluebird. — Michigan: Common summer resi- 

 dent throughout except on Isle Royale. 



A rather uncommon breeder in the sand region but more common 

 as a migrant. A single bird observed on Stony Island, July 12. Onh- 

 a pair or two of bluebirds were noticed on Sand Point, between June 

 17 and August 1. On June 27, a brood of young still being fed by 

 the parents were seen flying about a burning on the sand ridges. 

 After August 1, they became common on Sand Point, and they were 

 also common at this time at Rush Lake, both in the sand region and 

 clay country but particularly in the latter. After August 15, there 

 was a decided decrease in numbers. 



♦Life Zones and Crop Zones of the U. S., U. S. Dept. of Agr., Div. of Biol. Surv., Bull. No 10. 



