20 Wood, Warblers in Wayne County, Mich., in 1909. [jan. 



lands of the River Rouge, the home of a pair of Red-shouldered 

 Hawks and Green Herons. The two above localities will be 

 designated respectively as the river district and the inland district, 

 while the autumn river district refers to some twenty acres of 

 woods on Section 24, Monguagon Township, eight miles south of 

 the spring district. No such intensive observation was given 

 the autumn migration, both the waders and the raptores receiving 

 a share. An accident confined me to the house during the first 

 two weeks in October but the inland district was carefully worked 

 October 16 and 17 with gratifying results. I tried again October 

 24 but saw nothing except Myrtle Warblers and abandoned the 

 warblers for the year. 



The last week in April was cold and cloudy, culminating on the 

 night of the 28th and morning of the 29th in the greatest snowfall 

 so late in the season in the history of the local weather bureau, 

 covering 26 years. A very brisk wind with the temperature at 

 37° and an almost continuous snowstorm distinguished May 1, 

 and the 2d was very similar except that it did not snow as much. 

 Unfavorable as these conditions were the warblers began to arrive, 

 the Palm and Myrtle late but the Black and White and the Yellow 

 about on time. The wholly transient migration terminated be- 

 tween two days. Seven species were present May 27 and four on 

 the 29th. May 30 we spent all day in the inland district, but the 

 only wholly transient of any kind was a female Philadelphia Vireo, 

 though such warblers as the Cerulean and Golden-winged were 

 still migrating. May 16 was distinctly warbler day. In the heart 

 of the woods on the inland district they were congregated on the 

 ground along the margin of a water-covered section and the same 

 day similar conditions were observed by Mr. Bradshaw H. Swales 

 on Grosse Isle, and by Mr. Jefferson Butler on Belle Isle. A brisk 

 wind was blowing causing much swaying of branches and vibrat- 

 ing of leaves above but whether it was the insects or the warblers 

 that were forced down could not be determined. Such a con- 

 gestion of warblers I do not expect to see again. There were 

 hundreds of them within a hundred yard radius. Hopping here 

 and there or quickly fluttering over one another or jumping into 

 the air to capture a passing insect the general effect, as one glanced 

 along the forest floor, was a suggestion of whirling and drifting 



