Squirrel Proof Wild Bird Seed Works
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1999 Cornell University Feeding Study
The efficacy of capsaicin-treated sunflower seed as a repellent to birdseed Consumption by free-ranging Gray squirrels.
Dr. Paul D. Curtis
Eastern gray squirrels (Sciurus carolinensis) are considered to be a pest by many bird-lovers because they can steal significant quantities of seed from birdfeeders. None of the available methods of protecting birdseed against squirrels is completely effective. We assessed the efficacy of treating birdseed with capsaicin oleoresin as a means of deterring squirrels. Consumption of treated and untreated whole black-oil sunflower seed was compared by carrying out one-choice feeding trials at three sites near Ithaca, New York from 11 May to 24 June 1999. Untreated seed was provided in weeks 1, 2 and 4 and capsaicin-treated seed was offered in weeks 3, 5 and 6.
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