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WARBLING VIREO, Vireo gilvus (Vieill.) 



The warbling vireo appeared to be one of the most abundant 

 species in the Ticinity of the Biological Station. Every locality 

 described was enlivened by the presence and notes of this 

 charming greenlet. On the day of our arrival at the Station, 

 June 14, a nest of the warbling vireo was taken in the lot across 

 the road from the laboratory grounds. This nest was eight 

 feet from the ground, suspended in a small fork near the ex- 

 tremity of an oblique stem, and contained four eggs quite 

 advanced in incubation. The female occupied the nest when 

 it was discovered, and the male was singing in an evergreen 

 tree above the clump containing the nest. While the nest 

 was being disturbed, the female remained in the immediate 

 neighborhood, uttering ditties similar to those of the male. 



On the following day, June 15, a nest of this species was 

 noted in a swampy woods at the right of Swan River. It was 

 nine feet from the ground, situated as usual in a dependent 

 fork, and contained three fresh eggs. As in the preceding 

 instance, the female was attending to her home duties, while the 

 male was singing near the nest. Indeed, the song of this 

 vireo is generally a sure index of a nest in the immediate vicin- 

 ity, during the nesting season. 



East of the Swan River bridge and to the left of the road 

 leading thence southward, there is an extensive area of low, 

 damp woodland, which forms a very desirable home- for the 

 vireos, the olive-backed thrush, and other species. A nest 

 of the warbling vireo was examined in these woods on June 18. 

 It was six feet from the ground, pendent in a fork near the 

 end of a low sprout. Four fresh eggs formed the complement, 

 upon which one of the parent birds was sitting when disturbed 

 by the collector. 



Planking the road and adjacent woods, a rocky ridge stripped 

 of tall timber by fires and overgrown with maple clumps 

 and small evergreens, invites the attention of the collector. 

 On June 20, a nest of the warbling vireo was found there, sit- 

 uated nine feet from the ground in a maple clump. It con- 

 tained four eggs advanced in incubation. 



The woods around Esfe/s Pond form coverts for numbers 

 of warbling vireos. Mobile exploring the margins of this pond 

 on June 32, we took a nest of the warbling vireo from a 

 fork in bushes five and one-half feet from the ground. The 

 branch sustaining the nest overhung a trail along the pond, 

 so that anyone passing would likely brush against the nest 



