Population Biology Commons^™

Testing Three Chemicals For Deterring Crop Damage By Cranes, Anne E. Lacy, Jeb A. Barzen, Andrew P. Gossens

Proceedings of the North American Crane Workshop

Damage to planted corn seed by cranes has the potential to cause great economic loss in areas where both intersect. In 2000 the International Crane Foundation (ICF) tested limonene (LIM), methyl anthranilate (MA), and 9,10-anthraquinone (AQ) as possible replacements for the insecticides lindane and diazinon that had been used as deterrents to cranes damaging corn seed and seedlings. LIM, MA, and AQ lowered germination rates (down to 85, 90, and 92%, respectively) as compared to a germination rate of 96% in untreated corn. A 1.0% solution of AQ was effective as a crane deterrent, while LIM and MA were not. …

Effective And Sustainable Prevention Of Avian Damage To Planted Seeds Through Seed Treatment, Jeb A. Barzen, Kenneth E. Ballinger Jr.

Proceedings of the North American Crane Workshop

Several species of cranes and other wildlife have recovered from low populations because, in part, they have adapted to resources found in agricultural environments. If future conservation strategies are to succeed in areas dominated by agricultural use, we must develop sustainable models that solve crop damage problems that are caused by expanding wildlife populations. Using crane damage to planted seed as an example, we propose 1 such model of sustainable crop damage prevention. The deterrent, 9,10-anthraquinone (AQ), is a natural product produced by plants, in part to control bird frugivory, and induces gastro-intestinal distress (temporarily sickens an individual) in sandhill …

Sandhill Crane Foraging Behavior And Damage Estimates In Cornfields During Spring, Jeb A. Barzen, Andrew P. Gossens, Anne E. Lacy

Proceedings of the North American Crane Workshop

Damage to corn in the spring caused by greater sandhill cranes (Grus canadensis tabida) has increased concurrent with growth of the Eastern Population of cranes. Our study was designed to: 1) describe foraging rates and food acquisition behavior where damage was likely and 2) estimate damage in cornfields treated and untreated with a taste deterrent: 9,10-anthraquinone (AQ; Avipel®). Our 6,251.6-ha study area was located near Briggsville, Wisconsin, and we sampled 415 ± 13.2 individuals/ survey (x ± SE), of which 36 ± 1.7% used cornfields. During 10-30 May 2009, 121 observation bouts of 33 marked cranes that foraged …

Blackbirds, Richard A. Dolbeer, George M. Linz

Wildlife Damage Management Technical Series

The term blackbird loosely refers to a diverse group of about 10 species of North American birds that belong to the avian family Icteridae. The most common species include: Red-winged blackbird (Agelaius phoeniceus) Common grackle (Quiscalus quiscula) Great-tailed grackle (Quiscalus mexicanus) Brown-headed cowbird (Molothrus ater) Yellow-headed blackbird (Xanthocephalus xanthocephalus) Brewer’s blackbird (Euphagus cyanocephalus) Rusty blackbird (Euphagus carolinus) In addition to blackbirds, this family includes orioles, meadowlarks, and bobolinks.

Human-Wildlife Conflicts 1 Damage Identification 3 Management Methods 4 Economics 7 Species Overview 8 Legal Status 11 Glossary …