2. The grackle never harms Human being attact if someone troubles him
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Answer:
Among the predictable subjects of calls to this desk each spring and fall are complaints that someone's bird feeder is being "raided" or "taken over" by grackles.
Many feeder-operators don't take kindly to the big blackbirds stopping by to eat. Maybe that's because five or 10 of them, rather than one or two, will usually show up.
If you don't already know it, the common grackle is that foot-long blackbird seen nearly everywhere -- from golf courses and crop fields to shorelines and town parks -- usually in large numbers. Some people have even mistaken the large bird for a small crow. It survives on a varied diet ranging from grasshoppers and grubs to corn and caterpillars. When millet, milo or cracked corn is found at a birdfeeder, grackles will make it a regular stop on their appointed rounds.
"They make a real mess," complained an Allentown man in a phone call a few days back. "They can't stay on the (small) feeder so they just knock the (millet) to the ground and eat it there. I'd like to get rid of them but I don't know how."
My recommendation was to quit feeding millet and provide only sunflower seed in enclosed tube-feeders. The blackbirds will eat sunflower seeds but they're too big to cling to the small perches on the hanging, cylindrical feeders.
Maybe it's due to their abundance or any of a number of other characteristics and behaviors that the grackle is low bird on the birdwatcher's poll of feathered favorites. Or maybe it's just that they're too abundant and nothing "special" to birders. In a Pennsylvania Breeding Bird Survey from 1966 through 1987, data showed nesting grackles were more numerous than any other songbird, outnumbering even the robin, starling and red-winged blackbird.
Although many people pass it off as "just another blackbird," the common grackle is truly a bird of color and beauty. Its glossy, iridescent plumage shifts from blue to green to purple or bronze depending on the light. In fact, it's former official common name was "purple grackle" and, to the West, "bronze grackle." It might as readily have been called "green grackle," especially in the Southeast where that tint seems to dominate.Explanation: