Cambridge, Mass.
1910
March 19 [March 19, 1910]
  A Northern Shrike spent fully two hours this
morning (8 - 10 A.M.) sitting on a twig in the top of
a large apple tree in our garden singing almost continuously. Not
once during this time did it change its perch or
even its position although it moved its head freely
keeping, or I thought, a keen look out all the
while for possible prey. It was a fully mature bird
with black markings, clear-bluish gray back and white
underparts. Its voice was strong and clear and some
of its notes decidedly sweet and musical. It often
repeated one of them several times much as the Brown
Thrasher repeats its notes. Its song had some general
resemblance to that of a Thrasher in other repeats
but was decidedly less continuous or flowing and also,
of course, less pleasing. It is surprising that a bird 
ordinarily so nervous and restless as a Shrike should
have remained so very long in one place. It was probably
there still earlier for I heard it singing about 7 o'clock before
I was up & about.
Northern
 Shrike
spends two
hours on
one perch,
singing.