 Further east in Arabia is the endangered race "T. c. kalbaensis" with a population of 55 pairs or fewer; these are almost entirely restricted to Khor Kalba in the United Arab Emirates but breeding has also occurred recently at Khor Shinass in Oman.Further subspecies occur locally around the coasts of India and Bangladesh and on the Andaman and Nicobar Islands.In Southeast Asia and Indonesia the species is widespread and common, occurring far inland in some regions.