DIVERSITY OF AVIFAUNA DURING DIFFERENT DEVELOPMENTAL STAGES OF PADDY CROP IN TIRUCHIRAPPALLI DISTRICT,TAMIL NADU, INDIA

摘要

Paddy is one of the most important and large-scale grown cereal crops in India and also in many parts of the world. In general, birds play both positive and negative roles in agriculture ecosystem. Bird surveys were conducted in the Village of Anbil from Lalgudi Taluk of Tiruchirappalli District, Tamil Nadu. The encountered birds and their population observed during four different developmental stages of paddy crop Eco-system from August 2017 to December 2017 are presented in this communication. There were 78 bird species from 39 families recorded in the rice fields during the survey period. Of the 78 species, 76 and 2 bird species belonged to Least Concern and Near Threatened Categories, respectively. Among them, there were 73 species of bird's belonged to beneficial category and the remaining 5 were harmful birds. Further, there were 64 resident birds, 3 Resident Migrants and 11 Winter Migrants. All the observed 78 species of birds were classified into 8 major groups based on their diet. They areOmnivorous, Molluscivorous, Carnivorous, Insectivorous, Piscivorous, Granivorous, Frugivorous and Nectivorous. A maximum number of birds (34) were observed in the Insectivorous category. The propensity of birds observed were to the tune of 768,1145,1092and 887 during Vegetative, Milky, Panicle Formation and Panicle Maturation stages of the crop, respectively. It is obvious from the present study that diverse species of birds' visit and use the paddy crop ecosystem on their own thus indicating that they are in general mutually dependent on each other.