“…Their nesting sites are tall trees, buildings, and water towers with available food resources (Lindauer, 1956: Morse andBenton, 1967;Reddy, 1980, Hadorn, 1984. However, the biology, aggregation, migration and immigration of this species are poorly understood (Roepke, 1930;Lindauer, 1956;Morse and Benton, 1967;Koeniger and Koeniger, 1980;Seeley et al,. 1982;Hadorn, 1984;Sihag, 1998;).…”