THE BIRDS OF WISCONSIN. 
107 
FAliILY LANIID/E: SHRIKES. 
Lanius boreal is Vieill. NORTHERN SHRIKE. 
A winter visitant, regular, and sometimes common. It 
usually appears in October. Dr. Hoy claimed that a few spent 
the summer in the middle and northern parts of the state, and 
the same idea was entertained by Thure Kumlien fifty years 
ago. The nearest approach to summer residence we can learn 
of is the case of a young bird in the brown plumage shot 
September 0, 1891, in Jefferson County. This bird might have 
come a considerable distance, however. "We are unable to 
obtain any recent authentic records of its remaining in 
Wisconsin in summer, and very much doubt that it does. The 
northern shrike here feeds largely on the mice of the genus 
Microtus, but often catches the smaller birds also. 
Lnnius hidovicianus migrans Palmer. MIGRANT SHRIKE. 
Summer resident. A very early arrival in spring, often 
nesting early in April, and again in July. A common bird in 
open regions, along roadsides and borders of fields, where it 
nests preferably in isolated, bushy-topped trees. Not as 
common north of the central part of the state as south of it, 
except toward the northwest, where it appears to be found more 
or less to the extreme north portion. We feel that the above 
name is only provisional, but prefer to include all our smaller 
shrikes under the one name, rather than to include in this list 
both ludovicianus and excubitondes as we should otherwise 
have to do. 
FAHILY VIREONID/C: VIRE05 
Vireo olivaeeus (Linn.). RED-EYED VIREO. 
An abundant summer resident throughout the entire state. 
This vireo is one of our commonest nesting birds, although, 
hiding itself away in the most retired woodlands, as it usually 
does, it is as little known to the average person as some of our 
rarest visitors. Here, in any quiet spot, its beautiful song may 
be heard on all sides the entire summer through. No species 
appears to be as persistently imposed upon by the renegade 
cowbird as is the little red-eye; indeed, it is a rare circumstance 
to find a nest that does not contain one or more eggs of this 
miserable nuisance. 
