Effects of environmental conditions on aerial feeding by Collared Pratincoles Glareola pratincola breeding in southwest Spain



During the chick-rearing period, adult Collared Pratincoles Glareola pratincola tended to feed in the colony or nearby on insects caught in flight. Before and after this period, they often moved further from colonies to forage in groups over areas of marshes and reeds. Daily activity was highly influenccd.by weather conditions. Collared Pratincole feeding density was lower on rainy, windy or cloudy or cloudy days. [n generai, fccding activity increased through the morning up to early afternoon and decreased after that. Food availability in marsh and reed sites was higher than in the crop site. Apart frorn cereals, few Collared Pratineoles fed over crops.