Forest Preserve District of Cook County, Illinois
Nature Bulletins
Newton Home Page

Introduction and Instructions

Search Engine

Table of Contents

Copyright

Disclaimer

The Shrikes
Nature Bulletin No. 312-A   September 14, 1968
Forest Preserve District of Cook County
Richard B. Ogilvie, President
Roland F. Eisenbeis, Supt. of Conservation

THE SHRIKES
Once in a while, here in the Middle West, we farm boys used to see a peculiar bird, always alone, perched on a telephone pole or at the top of a small tree in a hedgerow. n was about the size of a robin but chunkier, with shorter legs, a bigger head, and a hooked beak like that of a hawk. Instead of powerful talons, however, it had feet like a songbird. It had a gray back, white underparts, black wings and tail with white markings, and a black stripe that extended along the sides of its head, through the eyes, and across the forehead .

This was the Migrant Shrike which, because of that sinister black mask and its habit of killing so much more than it ate, we called it "the Butcher Bird". We found caterpillars, large beetles, cicadas, crickets, baby snakes, frogs, field mice, lots of grasshoppers and occasionally a sparrow or other small bird, which the shrike had eaten only partially or not at all. Some of these were merely wedged in crotches but usually they were impaled upon a thorn of such trees as sage orange, hawthorn and honey locust, or upon a barbed wire. We watched a shrike dart from its perch, like an arrow, to pursue and seize such prey, then carry it to some thorny tree. Mice and birds are killed by vicious blows at the base of their skulls but apparently, because of its weak feet, this bird must fix its food upon a thorn, or in a crotch, in order to tear it apart.

The migrant shrike nests in most of our middle western and northeastern states but is nowhere abundant. They usually arrive during the latter part of April and leave during July or August. The nest is a deep bulky affair of small twigs, weed stems and grasses, thickly lined with plant down, feathers or wool and located from 2 to 2 0 feet up in the center of thorny trees, hedges or thickets.

The Loggerhead Shrike of our southeastern and gulf states is more abundant, especially in Florida. Its coloring is the same as that of the migrant shrike but its bill is larger and its tail longer. Its habits and food are the same and its song, in common with all our shrikes, sounds like a very poor, very harsh imitation of a catbird or a brown thrasher: squeaky whistles, gurgles and mews, jumbled-up with fairly melodious trills and notes resembling the calls of other birds. There are also three western races of logger-head shrikes.

The Northern Shrike nests from southern Canada to the northern limit of trees. In late autumn a few wander south into our northern states but about every fourth year, when mice are scarce in Canada, this species is found here in greater numbers and more widely distributed. It differs from the migrant shrike in that the black mask does not extend across the forehead, its underparts are marked with fine wavy gray lines, and it is about an inch longer. It kills more birds, larger birds, and seems more savage -- probably because there are no insects in winter and mice are hard to find. This is the shrike that John Burghs called "a feathered assassin" and denounced as a "Bluebeard among songbirds", that conceals "the character of a murderer under a form as innocent as that of a robin. Thoreau, because this shrike is one of the few birds that sings in midwinter, speaks of it as "perching now on winter's curls" and "heedless and unfrozen melody bringing back summer again..

Thoreau was not a sparrow.


To return to the Nature Bulletins Click Here!
Hosted by NEWTON

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (help@newton.dep.anl.gov), or at Argonne's Educational Programs

NEWTON AND ASK A SCIENTIST
Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Sponsered by Argonne National Labs