BIRDS. 301 



Harriet Wright. On August 20, the last one was seen on the Point. 

 In the sand region about Rush Lake a few birds were seen between 

 August 10 and 20. 



106. Dendroica vigorsii. Pine warbler. — Michigan: Not un- 

 common migrant and summer resident, breeding localh' throughout 

 the state except on Isle Royale. 



This species was the most common warbler that bred in the sand 

 region, and it was also a common migrant. Nests were found in 

 the tops of small jack pine trees. The following observations are 

 from notes of the senior writer: "On June 16, while tramping 

 through the sand dunes near the end of the Point, I saw a female on 

 the ground collecting material for a nest. With her bill full, she 

 flew into the top of a jack pine about thirty feet high. Here she 

 disappeared, and I next saw her on the ground with more material 

 which she carried to the same place in the jack pine. With the 

 glass the foundation of a nest was found, and the bird was watched 

 for a long time as she flew back and forth. The male came and 

 chased her away among the tree tops, but soon I heard his song and 

 found him perched on a dead hmb of a w^hite pine nearby, while the 

 female worked steadily on. The male was not seen to help with the 

 nest building, but stayed near by and kept singing his sweet clear 

 trill. Both birds were very tame and often came within a few feet 

 of me. About thirty hours later the nest seemed nearly complete. 

 It was a beautiful cup-shaped affair, quite deep and round, and was 

 placed in a thick bunch of short stems and small cones that were 

 woven into it. The outside was made of pieces of bark fibre and 

 grass or weed stems, and the walls seemed ready for the lining, which 

 was not seen as the nest was blown away a day or two afterward. 



On July 7, a female was observed about a pile of chips near camp 

 where she seemed to be picking up food and carrying it to a thick 

 bunch of jack pines not far away. On July 13 the first young were 

 seen, as they were being fed by the female, and they became common 

 about July 25. These local birds were all gone by August 3, and 

 none were seen on the Point until August 18, when small flocks were 

 again common all over the Point, with other migrating warblers that 

 no doubt came from across Saginaw Bay. (The species was found 

 breeding in Iosco County in June, 1907, by Miss Harriet Wright.) 



At Rush Lake the species was also not uncommon and became 

 numerous on August 10 and 11, but was seen but once after the latter 

 date. 



107. Dendroica discolor. Prairie warbler.— Michigan: Scarce 

 summer resident, breeding locally north of latitude 42°. 



This species was a rare migrant in the sand region. It Avas ob- 



