24 University of Michigan 



later. At Warren Dimes it occurred May 6, 1920, and later. 



Progne subis subis. Purple Martin. — A rare summer resi- 

 dent. A large colony occupied two houses at Mr. E. K. War- 

 ren's summer home near Lakeside in 1918, and a small colony 

 lived in a bird house near the south pond. April 19, 1920, 

 several Hew over the Warren Dunes at the north pond. 



Petrochelidon hmifrons lunifrons. Cliff Swallow. — This 

 species was noted only as a spring migrant at Birchwood Beach 

 April 29, 1918, where a few in company with other swallows 

 were flying north over the dunes. 



Hirundo erythrogastra. Barn Swallow. — A common sum- 

 mer resident noted daily after April 28, 1918, at Birchwood 

 Beach. At Warren Woods it was not seen until May 16, 



1919, and later a few others circled over the wood. April 29, 



1920, a few appeared at Warren Dunes and later a pair nested 

 in a barn near the north pond. 



Iridoprocne bicolor. Tree Swallow. — This common summer 

 resident was first seen April 28, 19 18, flying over the dunes at 

 Birchwood Beach. Later it was found breeding about the 

 inland ponds and streams. It was common at Warren Dunes 

 after April 30, 1920, breeding in the dead trees at the north 

 pond. 



Riparia riparia. Bank Swallow. — A summer resident, but 

 not very common. After May 7, 1918, a few were seen over 

 the dunes at Birchwood Beach, and later a small colony nested 

 in a gravel pit near Harbert. After May 3, 1920, a few were 

 noted at Warren Dunes. All of the swallows fed over the 

 water as well as over the dunes and cultivated fields. 



Vircosylra gik'a gilva. Warbling Vireo. — This summer res- 

 ident was rare in the region and was only recorded at Warren 

 Woods May 22, 1918, and at Warren Dunes after May 26, 1920. 



Lanivirco Hafifrons. Yellow-throated Vireo. — This is a 



