328 Wood, Autumn Warbler Migration. [.July 



the success of arboreal warblers in eluding detection is in no way 

 due to wariness or sagacity. They feel absolutely safe in the tree 

 tops and arc totally indifferent to what transpires on the ground 

 beneath. The cause is protective coloration and food habits that 

 keep them among the slender twigs and leaves. Of this type is 

 the Tennessee. On windy days they are practically safe among 

 the agitated leaves but are betrayed in calm weather by their natural 

 activity. As another type the Black and White may be mentioned. 

 They spend much time about the tree trunks and large limbs and 

 can not be overlooked. A mounted owl would make an excellent 

 decoy. 



In number of species the Mniotiltidse surpass all other families 

 here, and rank second in abundance of individuals. During 1906 

 I noted thirty species, or six in excess of the Fringillidee. The 

 following data refer to Ecorse Township, Wayne Co., Michigan, 

 and the summer and autumn of 1906, except where otherwise 

 stated. 



Warblers seen in spring but absent in fall were: Blue-winged 

 (HelminthophUa pi mis), Orange-crowned (Helminthophila celata), 

 Louisiana Water Thrush (Sri urns motacilla), Kentucky (GeotMypis 

 formosa), Mourning (GeotMypis pkiiadelphia) and Wilson's (117/- 

 sonia fnisiMa) — all the best possible for identification. 



In preparing the following list I have included a few birds with 

 haunts so similar to the warblers that they were constantly under 

 notice. 



Yellow-bellied Flycatcher (Enifridonax flaviventris) . — One-noted 

 Sept. 15. Exceptionally common in September, 1905. 



Red-breasted Nuthatch (Sitta ennadensis). — More common than 

 any other season in my recollection. Absent in autumn of 1905. Se- 

 cured a male January 11, 1891, which is the only winter record here 1 am 

 aware of. 



Red-eyed Vireo (Vireo olivaceus). — Abundant until Sept. 15; then 

 rare and last seen Sept. 30. Common 1905, and the last seen were secured 

 Oct. 12 and IT). 



Philadelphia Vireo (Vireo philadelphicus). — Absent, but noted in 

 spring of 1900 and Sept. 3, 5, 10 and 24, 1905. 



Warbling Vireo (Vireo gilvus). — No autumn records in three years 

 in this portion of Ecorse Twp. Common in spring. 



Yellow-throated Vireo (yireo flavifrons). — Common, inclusive of 

 Sept. 5, and last seen on the 7th; most abundant the last week in AugnM . 



