Nectar robbing by Purple Sunbird, Nectarinia asiatica (L.) in Pomegranate reduces reproductive success.

Aprimary report of nectar robbing and deleterious damage by Purple sunbird on pomegranate flowers in India. Nectar robbing through external pecking at the base of flower was observed at significant heights (11.45%). This unusual foraging behavior sternly damaged the setting ovary with deep uneven peck holes (0.59 + 0.02 cm dia; 0.31+0.02 cm deep) resulting in drop off from plants and deformed fruits. Presence of sufficient nectar secretion in bisexual (16.33+1.94 μl) and staminate (14.43+1.93 μl) flowers encouraged the nectar robbery. The higher foraging rates had profound negative effect on plant reproductive fitness affecting the fruit set and quality. [ABSTRACT FROM AUTHOR]