Abstract: Application of lime at a rate of 500 to 1500 kg/ha to plots desired to be protected from damage by avian and mammalian feeders has been shown to be quite effective. The lime may be administered to the plots in any form. Use of either powder or slurry form is preferred.

Abstract: There is provided by the invention a structure-activity model for identifying avian repellent compounds. It has now been found that certain topological and electronic features of a molecule, especially the presence of a core ring structure, the basicity of the molecule in general, and the electronegativity of the core ring structure, are predictive of its avian repellency. Such features may be used to identify avian repellent compounds and such compounds may be utilized in methods for repelling birds from consuming or utilizing a material. There is further provided by this invention, novel avian repellents for use in methods of repelling birds from consuming or utilizing materials otherwise susceptible to consumption or utilization. Additionally, methods for repelling birds from consuming or utilizing non-potable aquatic habitats are provided herein.