IOC) The Wilson Bulletin — No. 71. 



sand spit, for practically its whole length, anil about the Lake 

 Laboratory gives the impression of being abundant. It was found 

 on all of the wooded islands, even Hen island, and North Harbor. 

 The median date of arrival is April 30. My latest record is Octo- 

 ber 1, IDOO. I have not foimd a nest of this vireo in the past ten 

 years that did not have at least one egg of the Cowbird in it. and 

 there are often two and even three. One young Cowbird in a nest 

 is enough to cause the death of every young vireo. The earliest 

 nest recorded is Mlay 29, 190:!. 



188. Yircosylra philadelpliica. — Phlladeli)hia Vireo. 



Not recorded until May 24, 1900. when two were captured at Rug- 

 gles Beach, east of Huron. On September 21 and 24 of the same 

 year two were found near Oberlin. In 1907 four were found on the 

 sand spit April 29, and on May 13 it was found there in uncount- 

 able numbers. The last one was recorded on May 27, and none in 

 the fall. In 1908 it was recorded on May 11, 16, 18 and 20; 1 

 2, more than 10, and 1 respectively, all along the sand spit. 

 The records for 1909 are May 6, 12, 14, 17 and 19; 1, 1, 2, 3, and 1 

 respectively. From these all too scanty records the Sandusky re- 

 gion would appear to contain a distinct migration route. My short 

 experience with the bird in the spring migration indicates that it 

 is a lover of the bushes and shrubbery which are characteristic of 

 the borders of swamps, or the flood plain of small streams. Its 

 habitat is thus distinctly different from that of any other vireo. 



189. Yircof<yh-(i ;/ili:a. — Warbling Vireo. 



Common in parks and about human habitations, but scarce in 

 brushy wood from about May 1st to the middle of September. On 

 the Cedar Point sand spit it is much more numerous east of the 

 Lake Laboratory than west of it. The typical habitat seems to be 

 an open woods with considerable under-brush, always remembering 

 that in these days the vicinity of human habitations is preferred. 

 The median date of arrival is April 27. My latest fall record is 

 September 20, 1907. 



190. Lani vireo flavifioiis. — Yellow-throated Vireo. 



Tolerably common in tlie heavier woods from the first week in 

 May to the first of September. I found one about the middle of 

 the sand spit on April 27, 1908. which is the only record for the 

 sand spit. I did not find it on any of the islands. The typical hab- 

 itat is a woods with slender but high trees, and with little or no 

 underbrush. I have not fomid typical breeding places on any of the 

 islands, and there are none on Cedar Point except the pleasure 

 resort grounds. The median date of arrival is ^lay 1. My latest- 

 fall date is September 21. 190(;. 



