THE BIRDS OF WISCONSIN. 
113 
April, and is busily engaged at nest building by the 10th of 
May. Universally common and generally distributed over the 
state. 
Dendroica cierulescens (Gmel.J. BLACK-THROATED BLUE 
WARBLER. 
A common migrant from May 10 to May 30, and from the 
first of September until October. All points from which we 
have any record give this species as common. We are disposed 
to consider it as reallv a summer resident in the northern part 
of the state. There are several records of summer specimens 
from different sections. 
Dendroica coronata (Linn.). MYRTLE WARBLER. 
Migrant. The most abundant of all the warblers, the first 
arrival in the spring, and the last to leave us in the autumn. 
During late September and October it flocks along the road- 
side like the junco and tree sparrow. Sometimes taken in 
southern Wisconsin as late as December 1. King (1) says "a 
few may breed in northern Wisconsin, for I obtained a male at 
Elk Lake in Chippewa County, July 26, 1876." We have never 
found it in the state in summer. 
Dendroica maculosa (Gmcl.). MAGNOLIA WARBLER. 
The beautiful magnolia is also one of our most abundant 
warblers during the migrations, which reach their height 
through May and September. There are no authentic records 
of this species nesting within the state, but as it is recorded as 
nesting at Mackinac Island and in the north peninsula of 
Michigan it would not be surprising if a few summered in the 
state. All observers report it as common during the 
migrations, but it is far less plenty than thirty years ago. 
Dendroica rara (Wils.). CERULEAN WARBLER. 
A rather rare species in Wisconsin, though of regular 
occurrence, especially along Lake Michigan. There are many 
records for Lake Koshkonong, as this section has been closely 
observed for a long period. There are also records for Delavan, 
Milwaukee, Racine, Two Rivers, etc. Mr. Clark has not found 
it in Dunn County. Dr. Hoy considered it as a breeding 
species, which is very probably true. There is one record for 
Lake Koshkonong, June 14 (1872). 
1. Econ. Rel. Wis. Birds, Geol. of Wis. I, 503. 
