FOOD CHOICE IN BIRDS AND INSECT CHEMICAL DEFENSES

Many insects contain defensive compounds to protect them from parasite s or predators. The biological significance of insect defenses against insectivorous birds has been unsufficiently studied, and is poorly kn own. Insect defenses may affect the birds' choice of food, its foragin g behaviour, and may even have adverse effects on the birds' fitness. This paper briefly summarizes evidence that insect chemical defenses p lay a considerable role in avian feeding and nutrition.