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is a complex series of ecological changes combined with pesticides that build up and concentrate lethal chemicals in the food chain: from grass to grasshopper to mouse to shrike.
The usual cause of a downward spiral of bird populations is loss of habitat. The Mockingbird — a species that the shrike resembles in size and color — is thriving in the world man has made.
Both species like brushy, overgrown fields with clumps of thick shrubs. The shrike requires an exposed perch — a dead limb or utility wire — from which to stare at the ground for any movement that may signify food. From the perch, he flies with undulating flight and rapid wing beats to sail over the ground and pounce on his prey, which he captures and kills with his bill.
The eyesight of a Loggerhead Shrike is remarkable. In one study with a cap
94.2%