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Avian Use of Various Bait Mixtures Offered in Harvested Cornfields during Spring Migration in South Dakota
USDA National Wildlife Research Center - Staff Publications
  • George M. Linz, National Wildlife Research Center, U.S. Department of Agriculture
  • H. Jeffrey Homan, National Wildlife Research Center, U.S. Department of Agriculture
  • Ryan L. Wimberly, National Wildlife Research Center, U.S. Department of Agriculture
Date of this Version
1-1-2001
Abstract

The avicide, DRC-1339, is used to cull populations of spring-migrating blackbirds in eastern South Dakota to reduce damage to ripening sunflower in late summer. We investigated non-target bird hazards associated with using various grain mixtures to attract blackbirds (Icteridae), especially red-winged blackbirds (Agelaius phoeniceus), to avicide-treated bait broadcast in harvested cornfields. During spring 1997 and 1998, we recorded the species and numbers of birds attracted to 0.2-ha plots baited with cracked corn and brown rice, fine-chipped sunflower meats and brown rice (1997 only), and unsupplemented brown rice. Unbaited plots were used as reference sites. In 1997 and 1998, non-target birds showed no preference among bait mixtures (P's > 0.16). In 1997, blackbird preference did not differ among bait mixtures (P> 0.12); whereas, in 1998, blackbirds preferred the cord rice mixture over rice (P= 0.02). Our data show that augmenting brown rice with cracked corn or sunflower meats poses little additional risk to non-target birds and may help attract blackbirds to the baitsite.

Citation Information
George M. Linz, H. Jeffrey Homan and Ryan L. Wimberly. "Avian Use of Various Bait Mixtures Offered in Harvested Cornfields during Spring Migration in South Dakota" (2001)
Available at: http://works.bepress.com/george_m_linz/52/