in winter the swamp glistened with multi-colored flowers embellishing the trees and creepers , and the orchids dangling merrily from the branches of the trees ; the air was suffused with the fragrance of flowers and the ambience encompassing the land reverberated with chatters , squawks , clucks and screeches of migratory birds black-naked cranes , teals , francolins , goosanders , partridges , ibis bills , fork-tails , wag- tails , red-stars , pelicans and innumerable small birds .