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THE BIRDS OF WISCONSIN, 
Gontopns borealis (Swains.). OLIVE-SIDED FLYCATCHER. 
Rather a rare but regular migrant. More common during 
the latter part of May than in the autumn, when it appears 
sparingly for a short time from the last of August on. Breeds 
along Lake Michigan from Sheboygan northward, and doubt- 
less in other sections of the state. Specimens have been taken 
at Lake Koshkonong as late as June 10, often to June 2 and 3. 
We think this species is more common than generally sup- 
posed. When one has learned where to look for it, it can 
always be found during the migrations. Will usually be found 
on the topmost dead branch of a tree higher than the surround- 
ing ones, from which elevated perch it constantly darts out, 
frequently to great distances, after insects. 
Cojitopus virens (Linn.). WOOD PEWEE. 
The most abundant and generally distributed of the fly- 
catchers throughout the summer, nesting in almost every piece 
of woods. Arrives the last of April, or early in May (April 28 
to May 5), and remains until late in September (last dates 
September 13, 20, 27, 28). It often rears at least two broods, 
nesting commencing the first of June, and young unable to fly 
may still be found in August. 
Contopns richardsonii (Swains.). WESTERN WOOD PEWEE. 
Rare, straggling summer resident. Several typical western 
wood pewees have been taken at Lake Koshkonong. One 
pair, with nest and eggs, were identified by Dr. Cones as 
unquestionably of this species. Not reported by other 
observers at any point in the state, and we can add nothing to 
the above bare facts. Doubtless careful watching will prove 
its presence rarely at other localities within our boundaries. 
Empidonax flavi ventris Baird. YELLOW-BELLIED FLYCATCHER. 
Not as rare in Wisconsin as early writers have made us 
believe, the yellow-bellied flycatcher is a regular migrant and 
rare summer resident. A rather late arrival in the spring it is 
usually not present until May 15 to 30. Thure Kumlien took a 
nest with four eggs in the Bark River woods, Jefferson County, 
June 7, 1860, and two nests at a later date in 1803 and 1864. A 
nest was found by L. Kumlien in a tamarack swamp near 
Albion, Wisconsin, June 25, 1891. This nest contained two 
young just hatched, and one egg. Mr. F. H. King obtained a 
specimen at Worcester, July 26, 1876, which would lead one 
