Bill morphology is adapted to feeding niche in many avian species (e.g. Myton and Ficken 1967, Newton 1967). Consequently bill deformities, depending on their severity, may reduce an individual’s longevity and reproductive success. For species with broad foraging niches, i.e. generalists, individuals with abnormal feeding structures may compensate somewhat by restricting their efforts to whatever alternative foraging patterns or prey sizes are available.