1068 Report of State Geologist. 



about the size of that of the Cerulean Warbler. The identity of this 

 nest was ascertained beyond a doubt. A good view was had of the 

 female when first seen carrying the materials for building; also on the 

 next day with the glass, while she was at work on the nest. The 

 well-known song of the male was heard in the vicinity all the while 

 that nidifieation and incubation was going on. 



"The above article was ivritten several years ago for a friend, who 

 desired me to give him some information from my observations of the 

 family of Warblers in this locality. I have been able to add but little 

 of interest since in regard to the Sycamore Warbler. As the timber 

 is being cut from the bottom lands, they have become much rarer 

 than formerly. I am not positive that I saw more than a single bird 

 this year, 1897. In the swamps, away from the river, where sycamores 

 grow plentifully, I have sometimes come across a few of these birds, 

 and I believe they nested there, as they were seen or heard as late as 

 July. This species departs for their winter habitat along the last 

 of September, or the first of October, as I have never been able to 

 detect their presence later than the 10th of October. 



275. (667). Dendroica virens (Gmel.). 



Black-throated Green Warbler. 



,AduU Male. — Above, bright olive-green; wing, crossed by two white 

 bars; line over the eye and side of face, gamboge-yellow; chin, throat 

 and breast, deep black; belly, white. Adult Female. — Similar,. but 

 black markings more or less broken by yellow or whitish. Imma- 

 ture. — Similar to female; black markings almost replaced by yellow. 



Length, 4.35-5.40; wing, 2.40-2.55; tail, 1.90-2.05. 



Range. — Eastern North America, from Panama and Cuba, north- 

 ward to Hudson Bay, straggling to Greenland and Europe. Breeds 

 from South Carolina, northward along the Alleghanies. Common, 

 northern Ohio and northern Illinois and Michigan, northward. Win- 

 ters from Cuba and Mexico, southward. 



Nest, in woods, usually on horizontal branch of coniferous bush or 

 tree; 2 to 50 feet up; of bark, grass, twigs, fibres, feathers; lined with 

 down. Eggs, 4; white or creamy-white, spotted with burnt umber or 

 russet, and purplish-gray, usually arranged in wreaths about larger 

 ends; .64 by .48. 



The Black-throated Green Warbler is a very common migrant. Few 

 among the Wood Warblers, perhaps none, are as well known as this. 

 It comes after the earliest ones have renewed their acquaintance, and 

 is one of several that seem to be associated at this season. It spends 



