“…Owing to the cross-border character of mercury emission, the possibility of illegal transportation of mercury-containing wastes, and the complicated processes of migration and accumulation of this element in the environment, the continuous (short-and long-term) monitoring of this element is required (Boening, 2000;Bustnes et al, 2013). The use of birds as bioindicators of mercury levels provides an essential tool for studying the environmental quality of different ecosystems (Stankovic and Stankovic, 2013;Stankovic et al, 2014). As they play an important role in food chains, have wide geographical distribution, and are often sedentary species, birds are good biomonitors of heavy metals (Furnes et al, 1997;Ayaş, 2007;Ayaş et al, 2008;Castro et al, 2011;Bustnes et al, 2013;Stankovic and Stankovic, 2013).…”